Interfaces and surfaces are where the action happens. Catalysis, molecular recognition, charge transfer, polymerization and many other critical processes take place at the boundary between one medium and another. With the need to integrate new materials into devices, and applications ranging from catalysis to sensors, medicine to self-cleaning surfaces, and displays to lasers, fundamental and applied studies of surface and interface processes and optimization are of critical importance in developing new technology to meet today's challenges. The selection of recent research articles presented below illustrates the vast potential of this field.
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Straw poll: Flax straw extract added to strong alkaline solution acts as a mixed-type Al corrosion inhibitor. The electrochemistry of Al in alkaline solution and in the presence of a flax straw extract added to the alkaline solution, as well as the effect on the Al morphology, surface films formed, and the corrosion inhibition mechanism are discussed. Al–air cells that use alkaline solutions that contain the flax straw extract show a markedly higher discharge capacity compared with other alkaline electrolytes.
Ekaterina Grishina, Danny Gelman, Sergey Belopukhov, David Starosvetsky, Alec Groysman, Yair Ein-Eli
ChemSusChem, July 28, 2016, DOI: 10.1002/cssc.201600298. Read article
Silicon-nanosheet-based nanocomposites are synthesized in a one-step reaction. The hybrid material exhibits the processing properties of the polymeric matrix and the optoelectronic properties of the silicon material. In addition, the polymer stabilizes the nanomaterial against external influences, providing an insight into the photodegradation processes of the silicon monolayers.
Tobias Helbich, Alina Lyuleeva, Theresa Ludwig, Lavinia M. Scherf, Thomas F. Fässler, Paolo Lugli, Bernhard Rieger
Adv. Funct. Mater., July 28, 2016, DOI: 10.1002/adfm.201602137. Read article
Partially covered and supported: An ultrastable gold nanocatalyst was prepared by tuning the strong metal–support interaction between Au nanoparticles (NPs) and a titanium dioxide–hydroxyapatite (HAP) support (see picture). The Au NPs are located at the interfaces of TiO2/HAP support, forming anchored and partially covered active Au NPs.
Hailian Tang, Fei Liu, Jiake Wei, Botao Qiao, Kunfeng Zhao, Yang Su, Changzi Jin, Lin Li, Jingyue (Jimmy) Liu, Junhu Wang, Tao Zhang
Angew. Chem. Int. Ed., July 27, 2016, DOI: 10.1002/anie.201601823. Read article
Atomic-scale origin of the unusually high performance and long-term stability of wurtzite p-GaN oriented nanowire arrays is revealed. Nitrogen termination of both the polar top face and the nonpolar side faces of the nanowires is essential for long-term stability and high efficiency. Such a distinct atomic configuration ensures not only stability against (photo) oxidation in air and in water/electrolyte but as importantly provides the necessary overall reverse crystal polarization needed for efficient hole extraction in p-GaN.
Md Golam Kibria, Ruimin Qiao, Wanli Yang, Idris Boukahil, Xianghua Kong, Faqrul Alam Chowdhury, Michel L. Trudeau, Wei Ji, Hong Guo, F. J. Himpsel, Lionel Vayssieres, Zetian Mi
Adv. Mater., July 26, 2016, DOI: 10.1002/adma.201602274. Read article
Heal thyself! Healable conductive superhydrophobic films are fabricated by depositing a conductive superhydrophobic layer containing Ag nanowires on a thermally healable polymer film. Under a low applied voltage or upon irradiation with low-power near infrared light, Ag nanowires in the superhydrophobic films act as heaters to enable repeated and rapid restoration of lost superhydrophobicity caused by cuts or scratches several hundreds of micrometers wide.
Mengchun Wu, Yang Li, Ni An, Junqi Sun
Adv. Funct. Mater., July 25, 2016, DOI: 10.1002/adfm.201601979. Read article
As prepared and reduced form of 5 wt % Pd on CeZrO4-δ exhibit 100 % conversion for typical Suzuki C−C coupling reaction in 2.5 and 1 h, respectively; whereas, 1 wt % Pd photodeposited on reduced CeZrO4-δ support shows 100 % conversion in 20 min. Mechanistic investigations suggests a strong metal-support interaction through charge transfer, especially through oxygen vacancy sites on support.
Anand S. Burange, Rakesh Shukla, Avesh Kumar Tyagi, Chinnakonda S. Gopinath
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600655. Read article
Investigation of the surface properties with relaxation and reconstruction are crucial for understanding covellite stability and chemical reactivity. Three different cleavage planes along (001) direction leading to the exposition of the sulfur and copper atoms were investigated under DFT/Plane Waves formalism. Five relaxed surfaces arising from the cleavage planes were studied.
Antonio L. Soares, Egon C. Dos Santos, Ángel Morales-García, Hélio A. Duarte, Heitor A. De Abreu
ChemistrySelect, July 22, 2016, DOI: 10.1002/slct.201600422. Read article
A new molecular spring formed by hydrophobic Cu2(tebpz) (tebpz=3,3',5,5'-tetraethyl-4,4'-bipyrazolate) Metal-Organic Framework (MOF) and water is presented. Proposed nanoporous heterogeneous lyophobic system (HLS) has exceptional properties compared to numerous reported systems of such type in terms of stability, efficiency and operational pressure. Mechanical and thermal energetic characteristics, as well as stability of the system are discussed and are in details compared with other HLSs presented in the literature.
Yaroslav Grosu, Mian Li, Yun-Lei Peng, Dong Luo, Dan Li, Abdessamad Faik, Jean-Marie Nedelec, Jean-Pierre Grolier
ChemPhysChem, July 21, 2016, DOI: 10.1002/cphc.201600567. Read article
Synthesis of metal alloys usually requires harsh reaction conditions. We herein report that the chemical reactions of HAuCl4 and cubic Cu2O nanocrystal in an ethanol-water mixture solution at ambient temperature can form supported Au-Cu alloys. The parallel galvanic replacement reaction between HAuCl4 and Cu2O and disproportionation reaction of Cu2O simultaneously form Au and Cu atoms on the Cu2O surface, respectively, that cluster and grow into Au-Cu alloys. Supported AuCu alloy particles exhibit excellent activity in catalyzing the liquid phase aerobic oxidation reaction of benzyl alcohol. These results demonstrate a novel approach to fabricate metal alloys at very mild conditions via oxide surface-participated synthesis.
Zhenhua Zhang, Tian Cao, Liangfeng Luo, Rui Song, Huijuan Wang, Weixin Huang
ChemNanoMat, July 21, 2016, DOI: 10.1002/cnma.201600211. Read article
A broadband photodetector based on a single Se microtube is demonstrated with responsivity of ≈19 mA W−1 at 610 nm and fast speed (rise time 0.32 ms and fall time 23.02 ms). The responsivity of this device is improved by Au nanoparticles via a simple sputtering method and (≈600% to ≈800%) responsivity enhancement is realized within broadband region (300–700 nm).
Kai Hu, Hongyu Chen, Mingming Jiang, Feng Teng, Lingxia Zheng, Xiaosheng Fang
Adv. Funct. Mater., July 21, 2016, DOI: 10.1002/adfm.201602408. Read article
In this study, the femtosecond pump-probe technique is used to measure electron transfer of the Au nanoantenna/MoS2 heterostructure, which is fabricated by the template-based sputtering method with low cost and simple procedures. The results demonstrate that plasmon-induced hot electron transfer takes place in the heterostructure in the order of 200 fs with an injected electron density of about 5.6 × 1012 cm−2.
Ying Yu, Ziheng Ji, Shuai Zu, Bowen Du, Yimin Kang, Ziwei Li, Zhangkai Zhou, Kebin Shi, Zheyu Fang
Adv. Funct. Mater., July 21, 2016, DOI: 10.1002/adfm.201601779. Read article
Influence of oxygen onto the stability of SrVO3 film: At high temperature, these self-organized nanostructures appear with an angle of 90° between the two variants in an oxidizing atmosphere. They have been identified as Sr3V2O8. A fine control of oxygen pressure and temperature prevent their formation in order to obtain smooth and good quality of SrVO3 thin films.
Bruno Bérini, Valérie Demange, Muriel Bouttemy, Elena Popova, Niels Keller, Yves Dumont, Arnaud Fouchet
Adv. Mater. Interfaces, July 20, 2016, DOI: 10.1002/admi.201600274. Read article
The network density of polymer-wrapped semiconducting carbon nanotube networks is controlled by self-assembled monolayers on Al/AlO x gate electrodes for field-effect transistor fabrication. Medium-dense networks on self-assembled monolayers with long alkyl chains and amine or hydroxyl end-groups give the best combination of high on-conductances, high hole mobilities (up to 20 cm2 V−1 s−1), low trap densities, and low contact resistance.
Stefan P. Schießl, Florentina Gannott, Sebastian H. Etschel, Manuel Schweiger, Saeideh Grünler, Marcus Halik, Jana Zaumseil
Adv. Mater. Interfaces, July 20, 2016, DOI: 10.1002/admi.201600215. Read article
Time and temperature evolution of the crystalline phase and different amorphous fractions (totally mobile, slightly constrained mobile, and rigid) of poly(L-lactic acid) are measured (i) during crystallization at different temperatures and (ii) upon the successive cooling step down to room temperature. The exact evolution of all the phases is thus assessed during the entire thermal history of the material.
Maria Cristina Righetti, Daniele Prevosto, Elpidio Tombari
Macromol. Chem. Phys., July 19, 2016, DOI: 10.1002/macp.201600210. Read article
Charuksha Walgama, Matthew Gallman, Sadagopan Krishnan
Electroanalysis, July 19, 2016, DOI: 10.1002/elan.201600271. Read article
Corinne Lagrost, Yann Leroux, Philippe Hapiot
Electroanalysis, July 19, 2016, DOI: 10.1002/elan.201600203. Read article
The growing number of applications of layered double hydroxide (LDH) colloids demands for detailed understanding of particle aggregation processes in such samples. Tuning the colloidal stability in aqueous suspensions is essential in order to design stable systems or to induce controlled aggregation of these elongated particles. In this review, we summarize the recent progress in this field, i.e., charging and aggregation of LDHs of various compositions and sizes are discussed in the presence of different aggregating agents. The review focuses on the effect of monovalent salts, multivalent ions and polyelectrolytes on the suspension stability of LDHs. The provided information will help to better understand the origin of interparticle forces responsible for the colloidal stability and to design highly stable or aggregating LDH colloids according to the desired goal in certain applications. Moreover, the potential future research directions to obtain a broader picture about LDH aggregation are also suggested.
Marko Pavlovic, Paul Rouster, Tamas Oncsik, Istvan Szilagyi
ChemPlusChem, July 19, 2016, DOI: 10.1002/cplu.201600295. Read article
Viruses are small agents that can infect living creatures and cause harmful diseases. Rapid, sensitive virus detection would be beneficial for public health, and recent studies have shown that nanoparticles may have applications in virus detection. In particular, the unique properties of metal nanoparticles, originating from localized surface plasmon, allow for detection of virus through various methods. Additionally, the high surface-to-volume ratio and ease of surface modification of these nanoparticles provide advantages for bio-applications. In this focus review, we describe currently available and recent advances in virus detection methods with metal nanoparticles. First, we outline several features of traditional virus detection methods and provide a brief explanation of metal nanoparticles. Then, we discuss virus detection based on solution or substrate according to the main operating phase of the detection elements. Finally, we evaluate the use of clinical samples for virus detection with metal nanoparticles.
Jeong-Eun Park, Keunsuk Kim, Yoonjae Jung, Jae-Ho Kim, Jwa-Min Nam
ChemNanoMat, July 19, 2016, DOI: 10.1002/cnma.201600165. Read article
Surface functionalization controls local environments and induces solvent-like effects at liquid-solid interfaces. We explored structure-property relationships between organic groups bound to pore surfaces of mesoporous silica nanoparticles and Stokes shifts of adsorbed solvatochromic dye Prodan. Correlating shifts of the dye on the surfaces with its shifts in solvents resulted in a local polarity scale for functionalized pores. The scale was validated by studying the effects of pore polarity on quenching of Nile Red fluorescence and on the vibronic band structure of pyrene. Measurements were done in aqueous suspensions of porous particles, proving that the dielectric properties in the pores are different from the bulk solvent. The precise control of pore polarity was used to enhance the catalytic activity of TEMPO in the aerobic oxidation of furfuryl alcohol in water. An inverse relationship was found between pore polarity and activity of TEMPO in the pores, demonstrating that controlling the local polarity around an active site allows modulating the activity of nanoconfined catalysts.
Dilini Singappuli-Arachchige, Sebastian Manzano, Lindy Sherman, Igor I. Slowing
ChemPhysChem, July 18, 2016, DOI: 10.1002/cphc.201600740. Read article
Electron transfer (ET) reactions at a liquid/liquid (L/L) interface have attracted much attention because they are relevant to many important chemical and biological processes. Comparing with ion transfer (IT) reactions at a L/L interface, the ET is usually coupling with an IT and it is difficult to discriminate them. Despite of great progress has been made, the coupling nature is still misty and the two proposed mechanisms have been the subject of much argument over past several decades. In this work, the coupling reactions between ferrocene (Fc) in 1,2-dichloroethane (DCE) and Fe(CN)63- in water have been investigated in detail using various types of pipette electrodes, and the two mechanisms can be clarified with the help of salting out effects. We demonstrate that which mechanism dominating is dependent upon the concentration ratio of redox species in both phases.
Xin Zhang, Haomin Wang, Celeste Morris, Chaoyue Gu, Mingzhi Li, Lane Baker, Yuanhua Shao
ChemElectroChem, July 18, 2016, DOI: 10.1002/celc.201600234. Read article
Stefan Urth Nielsen, Line Koefoed, Henning Lund, Kim Daasbjerg, Steen U. Pedersen
Electroanalysis, July 15, 2016, DOI: 10.1002/elan.201600208. Read article
A toroidal dipole in metasurfaces provides an alternate approach for the excitation of high-Q resonances. In contrast to conventional multipoles, toroidal dipole interaction strength depends on the time derivative of the surrounding electric field. A characteristic feature of a toroidal dipole is tightly confined loops of oscillating magnetic field that curl around the fictitious arrow of a toroidal dipole vector.
Manoj Gupta, Vassili Savinov, Ningning Xu, Longqing Cong, Govind Dayal, Shuang Wang, Weili Zhang, Nikolay I. Zheludev, Ranjan Singh
Adv. Mater., July 15, 2016, DOI: 10.1002/adma.201601611. Read article
Chain gang: On cooling, absorbed acetic acid crystallized and aggregated on the surface of Al2O3 in cluster chains, which slowed acetate formation by covering the surface active sites on Al2O3. Crystalline acetic acid reacted with Al2O3 itself.
Siqi Hou, Shengrui Tong, Ying Zhang, Fang Tan, Yucong Guo, Maofa Ge
Chem. Asian J., July 13, 2016, DOI: 10.1002/asia.201600402. Read article
Hierarchical nanotubes consisting of ternary alloyed MoS2xSe2(1−x) nanosheets with tunable compositions and highly expanded interlayer spacings are synthesized for efficient hydrogen evolution reaction (HER). Significant enhancement in electrocatalytic HER activity is achieved by modulating the chalcogen composition and the interlayer distance of the ternary MoS2xSe2(1−x) alloys.
Junjun Zhang, Mei-Hui Wu, Zheng-Tian Shi, Miao Jiang, Wen-Jing Jian, Zhangru Xiao, Jixue Li, Chun-Sing Lee, Jun Xu
Small, July 12, 2016, DOI: 10.1002/smll.201601496. Read article
Tailoring cell–surface interactions is important for the of design medical implants as well as regenerative medicine and tissue engineering materials. Here the single parameter system is transcended via translating hard nanotopology into soft polymeric hydrogel structures via hydrogel imprinting lithography. The response of these cells to the nanotopology of the same dimensions but with different mechanical properties displays unexpected behavior between “hard” tissue cells and “soft” tissue cells.
Qihui Zhou, Patrick Wünnemann, Philipp T. Kühn, Joop de Vries, Marta Helmin, Alexander Böker, Theo G. van Kooten, Patrick van Rijn
Adv. Mater. Interfaces, July 12, 2016, DOI: 10.1002/admi.201600275. Read article
Lipid-siRNA materials self-assemble into different nanostructures onto substrates as a function of composition and environmental cues. This feature highlights the potential of using reversible transformations in lipid film materials for actuated surface-based cellular delivery. The diffusion of biomolecules is enhanced from 1D in lamellar and hexagonal phases to 3D in bicontinuous cubic phases by hydration at 37 °C.
Minjee Kang, Cecilia Leal
Adv. Funct. Mater., July 12, 2016, DOI: 10.1002/adfm.201600681. Read article
Quantum dot-based light-emitting diodes (QLEDs) with hybrid quantum dot-semiconducting polymer emission layers, which surpass the efficiency and brightness of the conventional QLEDs are developed. Their superior properties are a result of the morphology of the hybrid emission layer, which influences charge carrier transport and photoluminescence properties of the devices positively.
Ana Fokina, Yeonkyung Lee, Jun Hyuk Chang, Myeongjin Park, Younghun Sung, Wan Ki Bae, Kookheon Char, Changhee Lee, Rudolf Zentel
Adv. Mater. Interfaces, July 11, 2016, DOI: 10.1002/admi.201600279. Read article
Bubble, bubble…: It is demonstrated that ultrasound is ideal to investigate the existence of bulk nanobubbles because it is sensitive to small amounts of gas, can be used to determine the size distribution of the bubbles and it can discriminate between solid and gaseous inclusions.
Valentin Leroy, Tomohisa Norisuye
ChemPhysChem, July 08, 2016, DOI: 10.1002/cphc.201600576. Read article
Gold Nanorods (AuNRs) with different surface modification induce distinct metabolic consequences to cancer and noncancer cells. PEI-AuNRs show specific cytotoxiciy to A549 cancer cells companied with large disruptions to the cell metabolisms such as energy metabolism, choline metabolism, hexosamine biosynthesis pathway, and oxidative stress to cells. Comprehensive molecular information of different surface modified AuNRs can be valuable in designing purpose-driven AuNRs.
Zhigang Liu, Liming Wang, Limin Zhang, Xiaochun Wu, Guangjun Nie, Chunying Chen, Huiru Tang, Yulan Wang
Adv. Healthcare Mater., July 08, 2016, DOI: 10.1002/adhm.201600164. Read article
An ultralong life LiMn1/3Co1/3Ni1/3O2 microspherical cathode has been prepared by constructing an Mn-rich surface. Even after 600 cycles, its capacity retention ratio is still as large as 92.9% at a current density of 700 mA g−1. Additionally, it is discovered that both the corrosion of active materials and the segregation of TM ions can be mitigated by building layered lithium transition-metal oxides with an Mn-rich surface.
Dong Luo, Shaohua Fang, Yu Tamiya, Li Yang, Shin-ichi Hirano
Small, July 07, 2016, DOI: 10.1002/smll.201601923. Read article
Why did the boron cross the polymer? The physical and structural properties of gel-like high-viscosity dispersions (composed of partially hydrolyzed poly(vinyl acetate) and borax) are investigated as a function of the structure of added short-chain glycol ethers, which are incorporated into the solvent system both below and above the critical aggregation (or micellar) concentrations. An application to cleaning surfaces is also assessed.
Teresa T. Duncan, Barbara H. Berrie, Richard G. Weiss
ChemPhysChem, July 07, 2016, DOI: 10.1002/cphc.201600266. Read article
H2O2 generation: Hydrogen peroxide generation at the 2-nitrophenyloctyl ether (NPOE)/water interface with decamethylferrocene (DMFc) as the electron donor, catalyzed by using MoS2 microparticles, is demonstrated. The use of a carbon-paste electrode with an organic phase as a binder allows for electroregeneration of the electron donor.
Justyna Jedraszko, Olga Krysiak, Wojciech Adamiak, Wojciech Nogala, Hubert H. Girault, Marcin Opallo
ChemElectroChem, July 06, 2016, DOI: 10.1002/celc.201600242. Read article
In the formamidinium (FA) lead iodide/titania heterostructure the organic layer-mediated interface, i.e., FAI/titania interface, can induce photovoltaic diode effect via positive bias poling due to combined effects of ion diffusion, rotation of organic moieties, and ferroelectric redistribution.
Hong-Jian Feng, Jinsong Huang, Xiao Cheng Zeng
Adv. Mater. Interfaces, July 06, 2016, DOI: 10.1002/admi.201600267. Read article
A computational approach to predicting the precise 3D form of carbon nanotube (CNT) microstructures via strain-engineered CVD is presented and validated. The model incorporates the kinetics of CNT growth and the mechanics of the aligned CNTs. Analysis of the internal stress distribution allows prediction and mitigation of interface failure, and complex test structures are created, suggesting versatility of the predictive synthesis approach.
Sei Jin Park, Hangbo Zhao, Sanha Kim, Michael De Volder, A. John Hart
Small, July 05, 2016, DOI: 10.1002/smll.201601093. Read article
Strain is a promising handle to tune the surface properties of low dimensional materials. Firstly, four approaces to introduce strain to these materials are briefly summarized. Then the effects of strain on the electronic properties of layered materials and catalytic properties of nanoparticles are presented in detail. Finally, the challenges for the practical applications of strain engineering are also highlighted.
Shengchun Yang, Fuzhu Liu, Chao Wu, Sen Yang
Small, July 04, 2016, DOI: 10.1002/smll.201601203. Read article
A novel approach for studying the current percolation behavior in solution-deposited semiconducting two-dimensional networks composed of single-walled carbon nanotubes (SWNTs) is reported. The method which relies on the combination of atomic force microscopy and electrical field-effect measurements allows for the analysis of important network properties including surface coverage, metallic SWNTs content, degree of alignment and charge percolation with nanometer lateral resolution.
Francesca Bottacchi, Stefano Bottacchi, Florian Späth, Imge Namal, Tobias Hertel, Thomas D. Anthopoulos
Small, July 04, 2016, DOI: 10.1002/smll.201600922. Read article
MoSS-covered chest of surprises: A MoS2-modified C/LiVPO4F composite utilizing amorphous carbon as an interlayer and MoS2 layers as external surface delivers good electrochemical performance including long cycle life and remarkable rate capacity when used as anode material. This is attributed to improved stability and enhanced electron transfer at the MoS2-modified C/LiVPO4F surface, which is verified by first-principles calculations.
Zhaomeng Liu, Wenjie Peng, Zhenming Xu, Kaimin Shih, Jiexi Wang, Zhixing Wang, Xiaojun Lv, Jiangan Chen, Xinhai Li
ChemSusChem, July 04, 2016, DOI: 10.1002/cssc.201600370. Read article
A biocide-free antifouling method on wetted insulating surfaces is reported, which is enabled by the oscillation of electric potential generated by an integrated triboelectric wave harvester without additional power supplies. Significant anti-adhesion efficiencies for a variety of species are achieved.
Xue Jiao Zhao, Jing Jing Tian, Shuang Yang Kuang, Han Ouyang, Ling Yan, Zhong Lin Wang, Zhou Li, Guang Zhu
Adv. Mater. Interfaces, July 04, 2016, DOI: 10.1002/admi.201600187. Read article
Gold standard: A large series of Au25(SCnH2n+1)180 clusters is used to study the effect of ligand length on redox potentials. Use of the concentric-capacitor model shows that the average dielectric constant of the monolayer is significantly larger than that of the ligand chains. Its value depends on the number of carbon atoms of the ligand and is the result of contributions from ligands, solvent, and electrolyte.
Sabrina Antonello, Tiziano Dainese, Marco De Nardi, Lorena Perotti, Flavio Maran
ChemElectroChem, June 29, 2016, DOI: 10.1002/celc.201600276. Read article
A one-way water transport cotton fabric with an enhanced evaporation cooling effect is prepared by dip-coating a boron nitride-containing resin throughout the fabric and subsequently electrospraying one side to make this side hydrophobic.
Hua Zhou, Hongxia Wang, Haitao Niu, Chao Zeng, Yan Zhao, Zhiguang Xu, Sida Fu, Tong Lin
Adv. Mater. Interfaces, June 29, 2016, DOI: 10.1002/admi.201600283. Read article
This study presents to the occurrence of significant exchange bias in magnetic thin-film heterostructures even in the presence of a very small remnant magnetic field (∼5 Oe). This phenomenon has been demonstrated in the interface between the epitaxial layers of charge-ordered antiferromagnetic Y0.5Ca0.5MnO3 and ferromagnetic La0.7Sr0.3MnO3.
[Rapid Research Letter]
Rana Saha, K. Vasu, D. S. Negi, R. Datta, A. Sundaresan, C. N. R. Rao
Phys. Status Solidi RRL, June 28, 2016, DOI: 10.1002/pssr.201600155. Read article
A non-noble cause: Noble-metal-free materials have injected new vitality into traditional surface-enhanced Raman spectroscopy (SERS) and further investigation of novel substrates based on semiconductors or graphene materials will open up broader avenues of research for SERS detection.
Xianjun Tan, Jenny Melkersson, Shiqun Wu, Lingzhi Wang, Jinlong Zhang
ChemPhysChem, June 28, 2016, DOI: 10.1002/cphc.201600286. Read article
Stoichiometric versus reduced surfaces: Reduced Ru10/TiO2 surfaces can help the occurrence of phenol direct deoxygenation by facilitating C−OH cleavage.
Hsin-Yi Tiffany Chen, Gianfranco Pacchioni
ChemCatChem, June 28, 2016, DOI: 10.1002/cctc.201600457. Read article
Hydrophobic arrays of sharp conical nanotextures significantly enhance flow in slit-like nanochannels. The texture traps a highly pressure-resilient air layer which increases liquid slippage. Furthermore, negative charge accumulation at the liquid/air interface enables efficient electroosmotic flow.
Jonas Heverhagen, Mykola Tasinkevych, Atikur Rahman, Charles T. Black, Antonio Checco
Adv. Mater. Interfaces, June 28, 2016, DOI: 10.1002/admi.201600303. Read article
Size matters: the interface of nanodroplets in an inverse miniemulsion is used to produce polyphosphate nanocapsules with phosphorus acting as a probe for 31P NMR spectroscopy to compare the polycondensation at the nanoscopic droplet with macroscopic interfaces proving less unwanted hydrolysis in miniemulsion.
Evandro M. Alexandrino, Manfred Wagner, Katharina Landfester, Frederik R. Wurm
Macromol. Chem. Phys., June 27, 2016, DOI: 10.1002/macp.201600218. Read article
From seeds to nanocrystals: Silicon and germanium nanocrystals (NCs) are attractive materials owing to their unique size and surface-dependent optical properties. The synthesis, surface functionalization, optical properties, biomedical applications, and cytotoxicity of these NCs are compared and contrasted (see figure).
Benjamin F. P. McVey, Sujay Prabakar, Justin J. Gooding, Richard D. Tilley
ChemPlusChem, June 27, 2016, DOI: 10.1002/cplu.201600207. Read article
Tailored chemisorption: Supported oxide monolayers exhibit novel chemical properties that can be exploited for applications in catalysis. Drastic differences in the adsorption of NO on supported FeO monolayers are observed, depending on the metal substrate. These differences are found to result from steric blocking, which is due to substrate-induced buckling of the FeO films.
Lindsay R. Merte, Christopher J. Heard, Feng Zhang, Juhee Choi, Mikhail Shipilin, Johan Gustafson, Jason F. Weaver, Henrik Grönbeck, Edvin Lundgren
Angew. Chem. Int. Ed., June 27, 2016, DOI: 10.1002/anie.201601647. Read article
Nanoscale chemical and valence evolution at the metal/oxide (Ti/SrTiO3 (STO)) interface is investigated using high-resolution transmission electron microscope and electron energy loss spectroscopy. Oxidation of metal Ti to oxide with crystalline structure compatible to STO is discovered at the interface, while the STO substrate surfaces are reduced, leading to the formation of oxygen-vacancy-containing domains.
Yangyang Li, Qingxiao Wang, Ming An, Kun Li, Nimer Wehbe, Qiang Zhang, Shuai Dong, Tom Wu
Adv. Mater. Interfaces, June 27, 2016, DOI: 10.1002/admi.201600201. Read article
A visible light-responsive multilayer system, with an azo-containing polymer film as the intermediate layer has been developed for the controlled fabrication of the hierarchically patterned surfaces. It is based on the combined strategy of surface wrinkling with visible light irradiation. This study offers a new avenue to create micro/nano patterned surfaces on diverse functional films based on the stimuli-responsive wrinkling-based adaptive system.
Chuanyong Zong, Yan Zhao, Haipeng Ji, Jixun Xie, Xue Han, Juanjuan Wang, Yanping Cao, Conghua Lu, Hongfei Li, Shichun Jiang
Macromol. Rapid Commun., June 23, 2016, DOI: 10.1002/marc.201600229. Read article
A novel reverse transfection platform, which embraces a wrinkled-surface, is developed for highly efficient long-term gene delivery. Since reverse transfection utilizes the contact between cell and substrate, the increase in the contact area between substrate and cells significantly increases the gene delivery rate. Furthermore, by adopting microwell structures, multiplex, addressable delivery of exogenous materials is successfully demonstrated.
Hyunwoo Joo, Jisoo Shin, Seung-Woo Cho, Pilnam Kim
Adv. Healthcare Mater., June 23, 2016, DOI: 10.1002/adhm.201600354. Read article
This paper reviews recent development of colloidal crystal masks and applications of typical structures fabricated by colloidal lithography in plasmonics, wettability, biology, solar cells and etc., aiming at inspiration of ingenious combination of colloidal technique with practical applications.
Bin Ai, Helmuth Möhwald, Dayang Wang, Gang Zhang
Adv. Mater. Interfaces, June 22, 2016, DOI: 10.1002/admi.201600271. Read article
The layered structures of thin organic films used in organic light-emitting diodes are investigated using neutron reflectometry while under thermal stress. In all cases, diffusion between layers is observed. The onset of diffusion is mediated by the glass transition temperature (Tg) of the materials in the film, with the lowest Tg material initiating the diffusion process.
Jake A. McEwan, Andrew J. Clulow, Paul E. Shaw, Andrew Nelson, Tamim A. Darwish, Paul L. Burn, Ian R. Gentle
Adv. Mater. Interfaces, June 22, 2016, DOI: 10.1002/admi.201600184. Read article
A pronounced chemical redox reaction at an NiOnc-perovskite heterojunction to form the hole-dopant CH3NH3PbI3–2δOδ is determined. This interfacial hole-doping CH3NH3PbI3–2δOδ and NiOnc exhibits superior electronic properties to bring about the energy matching of NiOnc/perovskite interface and enable faster hole transport.
Ming-Wei Lin, Kuo-Chin Wang, Jeng-Han Wang, Ming-Hsien Li, Yu-Ling Lai, Takuji Ohigashi, Nobuhiro Kosugi, Peter Chen, Der-Hsin Wei, Tzung-Fang Guo, Yao-Jane Hsu
Adv. Mater. Interfaces, June 22, 2016, DOI: 10.1002/admi.201600135. Read article
Neural tissue engineering provides a new approach for treating neurodegenerative disease. An innovative method using surface patterning of a thermoresponsive culture substrate and coculture of neurons with patterned astrocytes produces tubular neural tissue constructs without the use of scaffolds. Through a thermally induced harvesting process, neuron bundles can be laid out in any desired pattern within a 3D tissue construct.
Hironobu Takahashi, Kazuyoshi Itoga, Tatsuya Shimizu, Masayuki Yamato, Teruo Okano
Adv. Healthcare Mater., June 22, 2016, DOI: 10.1002/adhm.201600197. Read article
An interfacial etching approach is developed for the synthesis of highly monodisperse and ultrasmall thiolated palladium nanoclusters (Pd NCs, 1.1±0.1 nm) using Zr-UiO-66-NH2 metal–organic frameworks (MOFs) as sacrificial templates. The Pd NCs size can be tuned by using MOF templates with different cavity sizes. The Pd NCs displayed activity in the Suzuki–Miyaura coupling reaction.
Xinle Li, Tian Wei Goh, Chaoxian Xiao, Alexandria L. D. Stanton, Yuchen Pei, Prashant K. Jain, Wenyu Huang
ChemNanoMat, June 20, 2016, DOI: 10.1002/cnma.201600121. Read article
Liquid interfaces: For a full understanding of the ion transfer during solvent extraction, knowledge about the extractant and ion distributions across the water–oil interface is necessary. The extractant and ion distributions at the water–oil interface were studied by X-ray and neutron reflectivity measurements for two different diamide extractants (see picture).
Ernesto Scoppola, Erik B. Watkins, Richard A. Campbell, Oleg Konovalov, Luc Girard, Jean-Francois Dufrêche, Geoffroy Ferru, Giovanna Fragneto, Olivier Diat
Angew. Chem. Int. Ed., June 20, 2016, DOI: 10.1002/anie.201603395. Read article
Self-assembled alumina-capped Ag particles, acting as “pinning points”, and unalloyed Ag particles are mixed together to form a mosaic structure, which can contribute to the excellent thermal tolerance of a new type solar absorber. Through a low-temperature pretreatment in air, this absorber exhibits desirable stability even after annealing at 500 °C for 1002 h.
Junhua Gao, Xiaoyu Wang, Bing Yang, Chengjun Tu, Lingyan Liang, Hongliang Zhang, Fei Zhuge, Hongtao Cao, Yousheng Zou, Ke Yu, Fei Xia, Yingying Han
Adv. Mater. Interfaces, June 20, 2016, DOI: 10.1002/admi.201600248. Read article
The mask-free patterning technique is employed to fabricate arrays of MoS2 and WS2 structures on silicon and graphene substrates with quality interfaces. By depositing precursor inks with the AFM cantilevers and subsequent heat treatment in the CVD furnace, it is demonstrated that MoS2 and WS2 structures can be formed on graphene surfaces at predefined device architectures.
Rui Dong, Logan Moore, Leonidas E. Ocola, Irma Kuljanishvili
Adv. Mater. Interfaces, June 20, 2016, DOI: 10.1002/admi.201600098. Read article
A dual responsive surface is constructed on hydrophilic polymer brushes to modulate cell migration ability on demand. The responsibility is based on the dynamic host–guest interaction between β-CD and azobenzene. Both competitive guest molecules and UV radiation are able to release azobenzene-REDV from the substrate, weakening the cell–substrate interaction and modulating the cell migration rate.
Tanchen Ren, Yelin Ni, Wang Du, Shan Yu, Zhengwei Mao, Changyou Gao
Adv. Mater. Interfaces, June 20, 2016, DOI: 10.1002/admi.201500865. Read article
Rapid versus slow synthesis: The effect of tin (Sn4+) modification on the surface of hematite electrodes synthesized by an aqueous solution route for different times is investigated. This modification results in changes to wettability and an enhancement of the photocurrent response for all hematite electrodes investigated (see figure).
Waldemir M. Carvalho, Flavio L. Souza
ChemPhysChem, June 17, 2016, DOI: 10.1002/cphc.201600316. Read article
I. Khalakhan, R. Fiala, J. Lavková, P. Kúš, A. Ostroverkh, M. Václavů, M. Vorokhta, I. Matolínová, V. Matolín
Fuel Cells, June 15, 2016, DOI: 10.1002/fuce.201600016. Read article
Moldable superhydrophobic surfaces are produced by freely covering a solid surface with specifically designed microcapsules. Owing to the presence of Fe-particles within the former microcapsules, they can be temporarily fixed on different substrates using a permanent magnet. Such systems are prospective candidates for the fabrication of water/oil repellent surfaces, liquid marbles, or microfluidic channels and as templates for microspheres fabrication.
Ana M. S. Costa, Nadya V. Dencheva, Sofia G. Caridade, Zlatan Z. Denchev, João F. Mano
Adv. Mater. Interfaces, June 15, 2016, DOI: 10.1002/admi.201600074. Read article
Cotton fabrics with hierarchical structures are developed by mimicking the fine morphology of fish scale. The developed materials can separate a wide range of commercial oily products from oil–water mixtures, with separation efficiencies more than 99% in a gravity-driven filtration operation, and provide a simple solution for environmental remediations, including cleanup of oil spills, fuel purification, and wastewater treatment.
Masud Rana, Jun-Teng Chen, Sudong Yang, Peng-Cheng Ma
Adv. Mater. Interfaces, June 09, 2016, DOI: 10.1002/admi.201600128. Read article
Finding reaction paths: the artificial force induced reaction (AFIR) method has been developed for exploring chemical structures and reaction pathways using computers. A technical overview of the AFIR method is presented, together with some numerical examples. The numerical results demonstrate its high applicability and efficiency
Satoshi Maeda, Yu Harabuchi, Makito Takagi, Tetsuya Taketsugu, Keiji Morokuma
The Chemical Record, June 03, 2016, DOI: 10.1002/tcr.201600043. Read article
Polyamidoamine (PAMAM)-conjugated alumina nanotubes are examined as novel potential nanomaterials for drug delivery, using three model therapeutic compounds. The PAMAM-conjugated material shows enhanced drug loading and releasing performances compared to pristine nanotubes.
Cristian H. Campos, Carola F. Díaz, José L. Guzmán, Joel B. Alderete, Cecilia C. Torres, Verónica A. Jiménez
Macromol. Chem. Phys., June 03, 2016, DOI: 10.1002/macp.201600136. Read article
A high-performance SERS substrate was fabricated by combining electro-oxidative lithography and self-assembly procedures. High SERS enhancement factors of 5×106 with good reproducibility were achieved by the interparticle and the intercluster plasmon coupling of the Au nanoparticle cluster arrays.
He Liu, Almut M. Schwenke, Florian Kretschmer, Stephanie Hoeppener, Ulrich S. Schubert
ChemNanoMat, June 03, 2016, DOI: 10.1002/cnma.201600063. Read article
At the interface: A facile and cost-effective method is demonstrated to improve graphene oxide (GO) dispersion and interface quality in an epoxy matrix by simultaneously functionalizing and reducing GO by covalently grafting organic aminopropyl-functionalized nanosilica sols (OAS). The covalent functionalization of GO with OAS makes the hydrophilic GO become hydrophobic and provides the active sites that allow linking between the graphene-based sheets and the epoxy matrix, which ensures improved thermal conductivity and mechanical properties.
Jifang Fu, Peisong Zong, Liya Chen, Xing Dong, Dapeng Shang, Wenqi Yu, Liyi Shi, Wei Deng
ChemNanoMat, May 31, 2016, DOI: 10.1002/cnma.201600131. Read article
Trending: Nanocrystalline molybdenum carbide is modified with metal nanoparticles for potential replacement of bulk platinum in water electrolyzers. The activity trends for alkaline and acid hydrogen evolution reactions (HERs) are established and compared to the trends predicted by the DFT calculated hydrogen binding energy. The effects of Pt on passivated versus non-passivated carbide surfaces on the HER activity is also demonstrated.
Qian Zhang, Brian M. Tackett, Qiyuan Wu, Jingguang G. Chen
ChemElectroChem, May 30, 2016, DOI: 10.1002/celc.201600171. Read article
Anharmonic downward distortion (ADD), indicated by the arrows, plays the role of a guidepost in the scaled hypersphere search method for searching reaction pathways connecting EQ, TS, and DC on the potential energy surface, one after another, to complete global reaction route mapping.
The Chemical Record, April 05, 2016, DOI: 10.1002/tcr.201500284. Read article
Novel dendrons for multipresentation: Water soluble, tetravalent glycodendrons that perform as powerful mannose-binding-lectin (MBL) antagonists are described. The stable scaffold adopted is a versatile tool for nested-layer multipresentation, which enabled the preparation of higher valency antagonists. All the constructs were tested as MBL-C antagonist by a surface-plasmon-resonance assay and showed binding with IC50 values in the low micromolar range.
Giulio Goti, Alessandro Palmioli, Matteo Stravalaci, Sara Sattin, Maria-Grazia De Simoni, Marco Gobbi, Anna Bernardi
Chem. Eur. J., January 15, 2016, DOI: 10.1002/chem.201504388. Read article.
Chains linked: Through the interplay of high-resolution scanning tunneling microscopy imaging and density functional theory calculations, the stepwise homocoupling of alkyl chains on Cu(110) is demonstrated, proceeding from the intact chain, via the dehydrogenative intermediates, to the final coupling products.
Liangliang Cai, Qiang Sun, Chi Zhang, Yuanqi Ding, Wei Xu
Chem. Eur. J., January 8, 2016, DOI: 10.1002/chem.201504152. Read article.
NPs@surfaces: Molecular cross-linkers direct the immobilization of two different gold nanoparticles (AuNPs) on different substrates. Aggregates and island-like films were obtained by using two electronically different cross-linkers and two types of AuNPs with hydrophilic or hydrophobic capping layers (see figure; Cit=citrate, TOAB=tetraoctylammonium bromide).
Sreejith Shankar, Meital Orbach, Revital Kaminker, Michal Lahav, Milko E. van der Boom
Chem. Eur. J., January 7, 2016, DOI: 10.1002/chem.201503297. Read article.
Porphyrin swap shop: Spectroscopic adsorption studies on two complementary model systems, atomically clean thin MgO(100) films and MgO nanocube powders, show that low-coordinated surface cations located in corner, edge, or step regions of the MgO surfaces are subject to ion exchange between adsorbed porphyrin molecules and the oxide surface.
Johannes Schneider, Matthias Franke, Martin Gurrath, Michael Röckert, Thomas Berger, Johannes Bernardi, Bernd Meyer, Hans-Peter Steinrück, Ole Lytken, Oliver Diwald
Chem. Eur. J., December 18, 2015, DOI: 10.1002/chem.201503661. Read article.
Inspired by nature: The ability of blue mussels and other marine creatures to attach to surfaces underwater and to make advanced materials have gained increasing awareness and interest amongst chemists. The combination of catechols and coordination chemistry to yield self-healing materials is the most recent sprout on this growing tree and is the focus of this Minireview.
Marie Krogsgaard, Vicki Nue, Henrik Birkedal
Chem. Eur. J., November 12, 2015, DOI: 10.1002/chem.201503380. Read article.
The evolution of the solid electrolyte interface (SEI) in carbon-coated ZnFe2O4 (ZFO-C) anodes is studied by soft X-ray absorption spectroscopy (XAS). Experiments probe locally the SEI growth in the 2–100 nm range, using both total electron (TEY) and total fluorescence (TFY) yield techniques. XAS analysis shows that the SEI grows preferentially around the ZFO-C nanoparticles.
Andrea Di Cicco, Angelo Giglia, Roberto Gunnella, Stephan L. Koch, Franziska Mueller, Francesco Nobili, Marta Pasqualini, Stefano Passerini, Roberto Tossici, Agnieszka Witkowska
Adv. Energy Mater., July 03, 2015, DOI: 10.1002/aenm.201500642. Read article
Keeping it clean: A crystal growth mechanism of Bi5O7I nanobelts is proposed. The modified Bi5O7I composites show excellent degradation activity of malachite green and bactericidal effects against Pseudomonas aeruginosa, which may be attributed to the higher charge carrier separation efficiency of these heterojunction structures (see figure).
Chaohong Liu, Dun Zhang
Chem. Eur. J., June 30, 2015, DOI: 10.1002/chem.201500383. Read article.