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Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

Bin Yuan, Lei Wang, Xiaohu Yang, Yujie Ding, Sicong Tan, Liting Yi, Zhizhu He, Jing Liu
The first ever oscillation phenomenon of a copper wire embraced inside a self-powered liquid metal machine is discovered. When contacting a copper wire to liquid metal machine, it would be swallowed inside and then reciprocally moves back and forth, just like a violin bow. Such oscillation could be easily regulated by touching a steel needle on the liquid metal surface.
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Jia Jia, Paul G O'Brien, Le He, Qiao Qiao, Teng Fei, Laura M Reyes, Timothy E Burrow, Yuchan Dong, Kristine Liao, Maria Varela, Stephen J Pennycook, Mohamad Hmadeh, Amr S Helmy, Nazir P Kherani, Doug D Perovic, Geoffrey A Ozin
The reverse water gas shift (RWGS) reaction driven by Nb2O5 nanorod-supported Pd nanocrystals without external heating using visible and near infrared (NIR) light is demonstrated. By measuring the dependence of the RWGS reaction rates on the intensity and spectral power distribution of filtered light incident onto the nanostructured Pd@Nb2O5 catalyst, it is determined that the RWGS reaction is activated photothermally. That is the RWGS reaction is initiated by heat generated from thermalization of charge carriers in the Pd nanocrystals that are excited by interband and intraband absorption of visible and NIR light...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Shuo Liu, Tie Jun Cui, Lei Zhang, Quan Xu, Qiu Wang, Xiang Wan, Jian Qiang Gu, Wen Xuan Tang, Mei Qing Qi, Jia Guang Han, Wei Li Zhang, Xiao Yang Zhou, Qiang Cheng
The concept of coding metasurface makes a link between physically metamaterial particles and digital codes, and hence it is possible to perform digital signal processing on the coding metasurface to realize unusual physical phenomena. Here, this study presents to perform Fourier operations on coding metasurfaces and proposes a principle called as scattering-pattern shift using the convolution theorem, which allows steering of the scattering pattern to an arbitrarily predesigned direction. Owing to the constant reflection amplitude of coding particles, the required coding pattern can be simply achieved by the modulus of two coding matrices...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Wan-Jing Yu, Chang Liu, Lili Zhang, Peng-Xiang Hou, Feng Li, Bao Zhang, Hui-Ming Cheng
Carbon nanotubes (CNTs) filled with iron sulfide nanoparticles (NPs) are prepared by inserting sulfur and ferrocene into the hollow core of CNTs followed by heat treatment. It is found that pyrrhotite-11T iron sulfide (Fe-S) NPs with an average size of ≈15 nm are encapsulated in the tubular cavity of the CNTs (Fe-S@CNTs), and each particle is a single crystal. When used as the anode material of lithium-ion batteries, the Fe-S@CNT material exhibits excellent electrochemical lithium storage performance in terms of high reversible capacity, good cyclic stability, and desirable rate capability...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Yu Liu, Gang Wang, Tianping Ying, Xiaofang Lai, Shifeng Jin, Ning Liu, Jiangping Hu, Xiaolong Chen
Metal-intercalated iron selenides are a class of superconductors that have received much attention but are less understood in comparison with their FeAs-based counterparts. Here, the controversial issues such as Fe vacancy, the real phase responsible for superconductivity, and lattice stability have been addressed based on first-principles calculations. New insights into the distinct features in terms of carrier doping have been revealed.
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Ayumi Tsutsui, Tamotsu Zako, Tong Bu, Yoshiki Yamaguchi, Mizuo Maeda, Katsunori Tanaka
Biologically relevant 1,5-diazacyclooctanes derived from polyamines and acrolein, inhibit Aβ40 peptide fibrillization and significantly suppress cell cytotoxicity. Formal [4+4] cycloaddition reaction of imines is thus involved in modulating oxidative stress processes associated with neural diseases.
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Xu Zhang, Xudong Zhao, Dihua Wu, Yu Jing, Zhen Zhou
The 2D material single-layer MnPSe3 would be a promising photocatalyst for water splitting, as indicated by the proper positions of band edges, strong absorption in visible-light spectrum, broad applicability (pH = 0 - 7), and high carrier mobility.
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Renjie Chen, Rui Luo, Yongxin Huang, Feng Wu, Li Li
Secondary batteries have become important for smart grid and electric vehicle applications, and massive effort has been dedicated to optimizing the current generation and improving their energy density. Multi-electron chemistry has paved a new path for the breaking of the barriers that exist in traditional battery research and applications, and provided new ideas for developing new battery systems that meet energy density requirements. An in-depth understanding of multi-electron chemistries in terms of the charge transfer mechanisms occuring during their electrochemical processes is necessary and urgent for the modification of secondary battery materials and development of secondary battery systems...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Martin G Nussbaumer, Jason T Duskey, Martin Rother, Kasper Renggli, Mohamed Chami, Nico Bruns
The group II chaperonin thermosome (THS) is a hollow protein nanoparticle that can encapsulate macromolecular guests. Two large pores grant access to the interior of the protein cage. Poly(amidoamine) (PAMAM) is conjugated into THS to act as an anchor for small interfering RNA (siRNA), allowing to load the THS with therapeutic payload. THS-PAMAM protects siRNA from degradation by RNase A and traffics KIF11 and GAPDH siRNA into U87 cancer cells. By modification of the protein cage with the cell-penetrating peptide TAT, RNA interference is also induced in PC-3 cells...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Cailing Chen, Chunguang Li, Zhan Shi
Along with the development of science and technology, lanthanide-doped upconversion nanostructures as a new type of materials have taken their place in the field of nanomaterials. Upconversion luminescence is a nonlinear optical phenomenon, which absorbs two or more photons and emits one photon. Compared with traditional luminescence materials, upconversion nanostructures have many advantages, such as weak background interference, long lifetime, low excitation energy, and strong tissue penetration. These interesting nanostructures can be applied in anticounterfeit, solar cell, detection, bioimaging, therapy, and so on...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Cao Guan, John Wang
Electrode materials play a decisive role in almost all electrochemical energy storage devices, determining their overall performance. Proper selection, design and fabrication of electrode materials have thus been regarded as one of the most critical steps in achieving high electrochemical energy storage performance. As an advanced nanotechnology for thin films and surfaces with conformal interfacial features and well controllable deposition thickness, atomic layer deposition (ALD) has been successfully developed for deposition and surface modification of electrode materials, where there are considerable issues of interfacial and surface chemistry at atomic and nanometer scale...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Guoqing Wang, Fangfang Tu, Jian Xie, Gaohui Du, Shichao Zhang, Gaoshao Cao, Xinbing Zhao
The working of nonaqueous Li-O2 batteries relies on the reversible formation/decomposition of Li2O2 which is electrically insulating and reactive with carbon and electrolyte. Realizing controlled growth of Li2O2 is a prerequisite for high performance of Li-O2 batteries. In this work, a sandwich-structured catalytic cathode is designed: graphene/Au-nanoparticles/Au-nanosheets (G/Au-NP/Au-NS) that enables controlled growth of Li2O2 spatially and structurally. It is found that thin-layer Li2O2 (below 10 nm) can grow conformally on the surface of Au NPs confined in between graphene and Au NSs...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Dan Tian, Jian Xu, Zhao-Jun Xie, Zhao-Quan Yao, Deng-Lin Fu, Zhen Zhou, Xian-He Bu
An unprecedented 3D hetero-triple-walled metal-organic framework is obtained by straightforward elaboration of the mixed molecular building block (MBB) strategy. In this approach, multiple individual flexible and rigid MBBs are integrated into one composite building block as separate layers, which are of the same shape but different sizes. This MOF shows exceptional water stability and the application of Li-ion battery electrodes.
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Huey-Liang Hwang, Hsueh-Hsin Chang, Poonam Sharma, Arya Jagadhamma Letha, Lexi Shao, Yafei Zhang, Bae-Heng Tseng
The concept of in-line sputtering and selenization become industrial standard for Cu-III-VI2 solar cell fabrication, but still it's very difficult to control and predict the optical and electrical parameters, which are closely related to the chemical composition distribution of the thin film. The present review article addresses onto the material design, device design and process design using parameters closely related to the chemical compositions. Its variation leads to change in the Poisson equation, current equation, and continuity equation governing the device design...
October 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Zonglong Zhu, Chu-Chen Chueh, Francis Lin, Alex K-Y Jen
A novel fullerene cathode interlayer is employed to facilitate the fabrication of stable and efficient perovskite solar cells. This modified fullerene surfactant significantly increases air stability of the derived devices due to its hydrophobic characteristics to enable 80% of the initial PCE to be retained after being exposed in ambient condition with 20% relative humidity for 14 days.
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Laura Fernández, Maxim Ilyn, Ana Magaña, Lucia Vitali, José Enrique Ortega, Frederik Schiller
A trigon structure formed by submonolayer gadolinium deposition onto Au(111) is revealed as a robust growth template for Co nanodot arrays. Scanning Tunneling Microscopy and X-Ray Magnetic Circular Dichroism measurements evidence that the Co nanoislands behave as independent magnetic entities with an out-of-plane easy axis of anisotropy and enhanced magnetic anisotropy values, as compared to other self-organized Co nanodot superlattices. The large strain induced by the lattice mismatch at the interface between Co and trigons is discussed as the main reason for the increased magnetic anisotropy of the nanoislands...
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Liuyuan Lan, Zhiming Chen, Qin Hu, Lei Ying, Rui Zhu, Feng Liu, Thomas P Russell, Fei Huang, Yong Cao
A novel donor-acceptor type conjugated polymer based on a building block of 4,8-di(thien-2-yl)-6-octyl-2-octyl-5H-pyrrolo[3,4-f]benzotriazole-5,7(6H)-dione (TZBI) as the acceptor unit and 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo-[1,2-b:4,5-b']dithiophene as the donor unit, named as PTZBIBDT, is developed and used as an electron-donating material in bulk-heterojunction polymer solar cells. The resulting copolymer exhibits a wide bandgap of 1.81 eV along with relatively deep highest occupied molecular orbital energy level of -5...
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Thomas G McKenzie, Qiang Fu, Mineto Uchiyama, Kotaro Satoh, Jiangtao Xu, Cyrille Boyer, Masami Kamigaito, Greg G Qiao
Recent developments in polymerization reactions utilizing thiocarbonylthio compounds have highlighted the surprising versatility of these unique molecules. The increasing popularity of reversible addition-fragmentation chain transfer (RAFT) radical polymerization as a means of producing well-defined, 'controlled' synthetic polymers is largely due to its simplicity of implementation and the availability of a wide range of compatible reagents. However, novel modes of thiocarbonylthio activation can expand the technique beyond the traditional system (i...
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Zonglong Zhu, Qifan Xue, Hexiang He, Kui Jiang, Zhicheng Hu, Yang Bai, Teng Zhang, Shuang Xiao, Kenan Gundogdu, Bhoj Raj Gautam, Harald Ade, Fei Huang, Kam Sing Wong, Hin-Lap Yip, Shihe Yang, He Yan
A polymer/PCBM hybrid electron transport layer is reported that enables high-performance perovskite solar cells with a high power conversion efficiency of 16.2% and with negligible hysteresis. Unlike previous approaches of reducing hysteresis by thermal annealing or fullerene passivation, the success of our approach can be mainly attributed to the doping of the PCBM layer using an insulating polymer (polystyrene) and an amine-containing polymeric semiconductor named PFNOX.
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Jie Yu, Gao Chen, Jaka Sunarso, Yinlong Zhu, Ran Ran, Zhonghua Zhu, Wei Zhou, Zongping Shao
The vital role of ethylenediaminetetraacetic acid on the structure and the oxygen reduction reaction activity of the non-precious-metal-based pyrolyzed catalyst is reported and elaborated. The resultant catalyst can overtake the performance of commercial Pt/C catalyst in an alkaline medium.
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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