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Advanced Materials

Jinyang Dong, Yanming Xue, Chao Zhang, Qunhong Weng, Pengcheng Dai, Yijun Yang, Min Zhou, Cuiling Li, Qiuhong Cui, Xiaohong Kang, Chengchun Tang, Yoshio Bando, Dmitri Golberg, Xi Wang
A novel carbon structure, highly branched homogeneous-N-doped graphitic (BNG) tubular foam, is designed via a novel N, N-dimethylformamide (DMF)-mediated chemical vapor deposition method. More structural defects are found at the branched portions as compared with the flat tube domains providing abundant active sites and spacious reservoirs for Li(+) storage. An individual BNG branch nanobattery is constructed and tested using in situ transmission electron microscopy and the lithiation process is directly visualized in real time...
December 2, 2016: Advanced Materials
Jianjian Zhang, Xu Zhen, Paul Kumar Upputuri, Manojit Pramanik, Peng Chen, Kanyi Pu
Organic semiconducting nanoprobes doped with bulky borane can undergo specific activation by ONOO(-) even at tumor-relevant acidic pH (6.8), permitting in vivo ratiometric photoacoustic imaging of ONOO(-) in the tumor environment of living mice.
December 1, 2016: Advanced Materials
Tao Liu, Xuexue Pan, Xiangyi Meng, Yu Liu, Donghui Wei, Wei Ma, Lijun Huo, Xiaobo Sun, Tack Ho Lee, Minjuan Huang, Hyosung Choi, Jin Young Kim, Wallace C H Choy, Yanming Sun
A series of wide-bandgap (WBG) copolymers with different alkyl side chains are synthesized. Among them, copolymer PBT1-EH with moderatly bulky side chains on the acceptor unit shows the best photovoltaic performance with power conversion efficiency over 10%. The results suggest that the alkyl side-chain engineering is an effective strategy to further tuning the optoelectronic properties of WBG copolymers.
December 1, 2016: Advanced Materials
Linus Pithan, Paul Beyer, Laura Bogula, Anton Zykov, Peter Schäfer, Jonathan Rawle, Chris Nicklin, Andreas Opitz, Stefan Kowarik
A novel strategy for direct photoalignment of molecular materials using optothermal re-orientation is introduced. Photoalignment for molecular materials such as the organic semiconductor tetracene is shown, without relying on additional photoreactive dopants or alignment layers. Patterning and polarized light emission, e.g., for polarized organic light emitting diodes is demonstrated.
December 1, 2016: Advanced Materials
Young-Jun Yu, Gwan-Hyoung Lee, Ji Il Choi, Yoon Su Shim, Chul-Ho Lee, Seok Ju Kang, Sunwoo Lee, Kwang Taeg Rim, George W Flynn, James Hone, Yong-Hoon Kim, Philip Kim, Colin Nuckolls, Seokhoon Ahn
The epitaxially grown alkane layers on graphene are prepared by a simple drop-casting method and greatly reduce the environmentally driven doping and charge impurities in graphene. Multiscale simulation studies show that this enhancement of charge homogeneity in graphene originates from the lifting of graphene from the SiO2 surface toward the well-ordered and rigid alkane self-assembled layers.
December 1, 2016: Advanced Materials
Zhiping Wang, David P McMeekin, Nobuya Sakai, Stephan van Reenen, Konrad Wojciechowski, Jay B Patel, Michael B Johnston, Henry J Snaith
Air-stable doping of the n-type fullerene layer in an n-i-p planar heterojunction perovskite device is capable of enhancing device efficiency and improving device stability. Employing a (HC(NH2 )2 )0.83 Cs0.17 Pb(I0.6 Br0.4 )3 perovskite as the photoactive layer, glass-glass laminated devices are reported, which sustain 80% of their "post burn-in" efficiency over 3400 h under full sun illumination in ambient conditions.
December 1, 2016: Advanced Materials
Susilo Japip, Kuo-Sung Liao, Tai-Shung Chung
The H2 /CO2 separation properties of di/triamine vapor cross-linked mixed matrix membranes with molecularly tuned free-volume at 150 °C are reported. Free-volume is molecularly tuned by altering the degree of chain-motion using cross-linkers with different chain length. A more restricted degree of chain-motion is achieved in the cross-linked network and the resultant membrane has a higher H2 /CO2 selectivity at 150 °C.
November 30, 2016: Advanced Materials
Huifang Zhang, Ming Kang, Xueqian Zhang, Wengao Guo, Changgui Lv, Yanfeng Li, Weili Zhang, Jiaguang Han
Efficient control over the conversion of optical angular momentum from spin to orbital form in a metasurface system is achieved. Under coherent symmetric incidence, it can support nearly 100% conversion and unitary output, while it can support 50% conversion with 25% transmittance under one beam incidence.
November 30, 2016: Advanced Materials
Yang Zhang, Yongbo Yuan, Jinsong Huang
Ultraweak light detection with solid-state and cooling-free photodetectors is important for both fundamental research and practical applications. A general phototransistor architecture for detecting ultraviolet-visible light down to 100 fW cm(-2) at room temperature is demonstrated. The exceptional sensitivity stems from an amplification process triggered by incident light. A responsivity of ≈10(7) A W(-1) is achieved.
November 29, 2016: Advanced Materials
Zixiong Sun, Chunrui Ma, Ming Liu, Jin Cui, Lu Lu, Jiangbo Lu, Xiaojie Lou, Lei Jin, Hong Wang, Chun-Lin Jia
Ultrahigh energy storage density of 52.4 J cm(-3) with optimistic efficiency of 72.3% is achieved by interface engineering of epitaxial lead-free oxide multilayers at room temperature. Moreover, the excellent thermal stability of the performances provides solid basis for widespread applications of the thin film systems in modern electronic and power modules in harsh working environments.
November 29, 2016: Advanced Materials
Masoud Ghasemi, Long Ye, Qianqian Zhang, Liang Yan, Joo-Hyun Kim, Omar Awartani, Wei You, Abay Gadisa, Harald Ade
A sequential-casting ternary method is developed to create stratified bulk heterojunction (BHJ) solar cells, in which the two BHJ layers are spin cast sequentially without the need of adopting a middle electrode and orthogonal solvents. This method is found to be particularly useful for polymers that form a mechanically alloyed morphology due to the high degree of miscibility in the blend.
November 29, 2016: Advanced Materials
Zhiqiang Jiang, Jinxiu Liu, Meiyan Gao, Xi Fan, Lei Zhang, Jian Zhang
Polyoxo-titanium clusters (PTCs) are applied to construct highly efficient ternary PTC/CdS/MIL-101 visible-light-range H2 -evolution photocatalysts. The application of PTCs not only increases the photocatalytic activities but also provides a molecular tool to tune them.
November 29, 2016: Advanced Materials
Karoline Herget, Patrick Hubach, Stefan Pusch, Peter Deglmann, Hermann Götz, Tatiana E Gorelik, Il'ya A Gural'skiy, Felix Pfitzner, Thorben Link, Stephan Schenk, Martin Panthöfer, Vadim Ksenofontov, Ute Kolb, Till Opatz, Rute André, Wolfgang Tremel
CeO2-x nanorods are functional mimics of natural haloperoxidases. They catalyze the oxidative bromination of phenol red to bromophenol blue and of natural signaling molecules involved in bacterial quorum sensing. Laboratory and field tests with paint formulations containing 2 wt% of CeO2-x nanorods show a reduction in biofouling comparable to Cu2 O, the most typical biocidal pigment.
November 29, 2016: Advanced Materials
Wangyang Fu, Lin Jiang, Erik P van Geest, Lia M C Lima, Grégory F Schneider
Recent research trends now offer new opportunities for developing the next generations of label-free biochemical sensors using graphene and other two-dimensional materials. While the physics of graphene transistors operated in electrolyte is well grounded, important chemical challenges still remain to be addressed, namely the impact of the chemical functionalizations of graphene on the key electrical parameters and the sensing performances. In fact, graphene - at least ideal graphene - is highly chemically inert...
November 29, 2016: Advanced Materials
Jun Woo Jeon, Se Youn Cho, Yu Jin Jeong, Dong Seok Shin, Na Rae Kim, Young Soo Yun, Hyun-Tae Kim, Soo Bong Choi, Won G Hong, Hae Jin Kim, Hyoung-Joon Jin, Byung Hoon Kim
Thermally reducible pyroprotein-based electronic textiles (e-textiles) are fabricated using graphene oxide and a pyroprotein such as cocoon silk and spider web without any chemical agents. The electrical conductivity of the e-textile is 11.63 S cm(-1) , which is maintained even in bending, washing, and temperature variation.
November 29, 2016: Advanced Materials
Eden Morales-Narváez, Luis Baptista-Pires, Alejandro Zamora-Gálvez, Arben Merkoçi
The main properties of graphene derivatives facilitating optical and electrical biosensing platforms are discussed, along with how the integration of graphene derivatives, plastic, and paper can lead to innovative devices in order to simplify biosensing technology and manufacture easy-to-use, yet powerful electrical or optical biosensors. Some crucial issues to be overcome in order to bring graphene-based biosensors to the market are also underscored.
November 29, 2016: Advanced Materials
Florian Geyer, Clarissa Schönecker, Hans-Jürgen Butt, Doris Vollmer
Superomniphobic membranes for post-combustion CO2 capture are introduced. Concentrated aqueous amine solutions stay on the topmost part of the membranes, providing a large liquid/CO2 interface. Wetting of the membrane, which reduces the capture efficiency, is prevented. The CO2 capture rates using the chemically, mechanically, and thermally stable superomniphobic membranes are enhanced by up to 40% relative to commercial membranes.
November 29, 2016: Advanced Materials
Olga J G M Goor, Henk M Keizer, Anne L Bruinen, Moniek G J Schmitz, Ron M Versteegen, Henk M Janssen, Ron M A Heeren, Patricia Y W Dankers
Selective surface modification reactions can be performed on additives that are supramolecularly incorporated into supramolecular materials. Hereby, processing of the material, that regularly requires harsh processing conditions (i.e., the use of organic solvents and/or high temperatures), and functionalization can be decoupled. Moreover, high-resolution depth profiling by time-of-flight (ToF) secondary-ion mass spectrometry clearly shows distinct differences in surface and bulk material composition.
November 29, 2016: Advanced Materials
Zhong Zheng, Omar M Awartani, Bhoj Gautam, Delong Liu, Yunpeng Qin, Wanning Li, Alexander Bataller, Kenan Gundogdu, Harald Ade, Jianhui Hou
Fullerene-free organic solar cells show over 11% power conversion efficiency, processed by low toxic solvents. The applied donor and acceptor in the bulk heterojunction exhibit almost the same highest occupied molecular orbital level, yet exhibit very efficient charge creation.
November 28, 2016: Advanced Materials
Xuyang Wang, Xin Gan, Tao Hu, Kazunori Fujisawa, Yu Lei, Zhong Lin, Ben Xu, Zheng-Hong Huang, Feiyu Kang, Mauricio Terrones, Ruitao Lv
Free-standing and flexible WS2 /WO2.9 /C hybrid membranes are synthesized and used as catalytic electrodes for electrochemical hydrogen evolution, exhibiting a high and stable catalytic activity. In virtue of the synergetic effect, a low onset overpotential of 20 mV and a Tafel slope of 36 mV dec(-1) are achieved.
November 28, 2016: Advanced Materials
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