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Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

Lingling Zhan, Shuixing Li, Huotian Zhang, Feng Gao, Tsz-Ki Lau, Xinhui Lu, Danyang Sun, Peng Wang, Minmin Shi, Chang-Zhi Li, Hongzheng Chen
Herein, efficient organic solar cells (OSCs) are realized with the ternary blend of a medium band gap donor (poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b']dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5',7'-bis(2-ethylhexyl)benzo[1',2'-c:4',5'-c']dithiophene-4,8-dione)] (PBDB-T)) with a low band gap acceptor (2,2'-((2Z,2'Z)-(((2,5-difluoro-1,4-phenylene)bis(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene-6,2-diyl))bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (HF-PCIC)) and a near-infrared acceptor (2,2'-((2Z,2'Z)-(((4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl)bis(4-((2-ethylhexyl)oxy)thiophene-5,2-diyl))bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IEICO-4F))...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Xin Tong, Xiang-Tian Kong, Chao Wang, Yufeng Zhou, Fabiola Navarro-Pardo, David Barba, Dongling Ma, Shuhui Sun, Alexander O Govorov, Haiguang Zhao, Zhiming M Wang, Federico Rosei
Colloidal heterostructured quantum dots (QDs) are promising candidates for next-generation optoelectronic devices. In particular, "giant" core/shell QDs (g-QDs) can be engineered to exhibit outstanding optical properties and high chemical/photostability for the fabrication of high-performance optoelectronic devices. Here, the synthesis of heterostructured CuInSe x S2- x (CISeS)/CdSeS/CdS g-QDs with pyramidal shape by using a facile two-step method is reported. The CdSeS/CdS shell is demonstrated to have a pure zinc blend phase other than typical wurtzite phase...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Fangbing Shi, Zhibin Geng, Keke Huang, Qingshuang Liang, Yuan Zhang, Yu Sun, Jungang Cao, Shouhua Feng
Black phosphorus (BP) nanosheet (NS) is an emerging oxygen evolution reaction (OER) electrocatalyst with both high conductivity and abundant active sites. However, its ultrathin structure suffers instability because of the lone pair electrons exposed at the surface, which badly restricts durability for achieving long-term OER catalysis. Herein, a facile solvothermal reduction route is designed to fabricate Co/BP NSs hybrid electrocatalyst by in situ growth of cobalt nanoparticles on BP NSs. Notably, electronic structure engineering of Co/BP NSs catalyst is observed by electron migration from BP to Co due to the higher Fermi level of BP than that of Co...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Jae Keun Nam, Do Hyung Chun, Ryan Joon Kyu Rhee, Jung Hwan Lee, Jong Hyeok Park
In an attempt to replace thermally vulnerable organic perovskites, considerable research effort has recently been focused on the development of all-inorganic perovskites in the field of photovoltaics. The preceding studies demonstrated that cesium lead halide perovskites are promising candidates for thermally stable and efficient solar cell materials. Here, the recent progress in cesium lead halide perovskite-based solar cells is summarized. Whether organic cations are essential for the superiority of halide perovskites is controversial...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Evangelia Dislaki, Shauna Robbennolt, Mariano Campoy-Quiles, Josep Nogués, Eva Pellicer, Jordi Sort
Fe-Cu films with pseudo-ordered, hierarchical porosity are prepared by a simple, two-step procedure that combines colloidal templating (using sub-micrometer-sized polystyrene spheres) with electrodeposition. The porosity degree of these films, estimated by ellipsometry measurements, is as high as 65%. The resulting magnetic properties can be controlled at room temperature using an applied electric field generated through an electric double layer in an anhydrous electrolyte. This material shows a remarkable 25% voltage-driven coercivity reduction upon application of negative voltages, with excellent reversibility when a positive voltage is applied, and a short recovery time...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Jianing An, Truong-Son Dinh Le, Chin Huat Joel Lim, Van Thai Tran, Zhaoyao Zhan, Yi Gao, Lianxi Zheng, Gengzhi Sun, Young-Jin Kim
The increasing demand for wearable optoelectronics in biomedicine, prosthetics, and soft robotics calls for innovative and transformative technologies that permit facile fabrication of compact and flexible photodetectors with high performance. Herein, by developing a single-step selective laser writing strategy that can finely tailor material properties through incident photon density control and lead to the formation of hierarchical hybrid nanocomposites, e.g., reduced graphene oxide (rGO)-zinc oxide (ZnO), a highly flexible and all rGO-ZnO hybrid-based photodetector is successfully constructed...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Bo-Ram Lee, Eunji Jo, Hong Yeol Yoon, Chul Joo Yoon, Hyo-Jung Lee, Koo Chul Kwon, Tae Woo Kim, Jeewon Lee
Although protein nanoparticles (PNPs) (e.g., viral capsids) capable of delivering a broad range of drug agents have shown distinctive advantages over synthetic nanomaterials, PNPs have an intrinsic drawback that hampers their clinical application, that is, potential immunogenicity. Here, a novel method for resolving the immunogenicity problem of PNPs, which is based on the genetic presentation of albumin-binding peptides (ABPs) on the surface of PNP, is reported. ABPs are inserted into the surface of a viral capsid (hepatitis B virus capsid/HBVC) while preserving the native self-assembly function of HBVC...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Xing Zhou, Xiaozong Hu, Bao Jin, Jing Yu, Kailang Liu, Huiqiao Li, Tianyou Zhai
2D GeSe possesses black phosphorous-analog-layered structure and shows excellent environmental stability, as well as highly anisotropic in-plane properties. Additionally, its high absorption efficiency in the visible range and high charge carrier mobility render it promising for applications in optoelectronics. However, most reported GeSe-based photodetectors show frustrating performance especially in photoresponsivity. Herein, a 2D GeSe-based phototransistor with an ultrahigh photoresponsivity is demonstrated...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Gloria A A Saracino, Federico Fontana, Shehrazade Jekhmane, João Medeiros Silva, Markus Weingarth, Fabrizio Gelain
Self-assembling and molecular folding are ubiquitous in Nature: they drive the organization of systems ranging from living creatures to DNA molecules. Elucidating the complex dynamics underlying these phenomena is of crucial importance. However, a tool for the analysis of the various phenomena involved in protein/peptide aggregation is still missing. Here, an innovative software is developed and validated for the identification and visualization of b -structuring and b -sheet formation in both simulated systems and crystal structures of proteins and peptides...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Vishak Venkatraman, Jacob T Friedlein, Alexander Giovannitti, Iuliana P Maria, Iain McCulloch, Robert R McLeod, Jonathan Rivnay
With a host of new materials being investigated as active layers in organic electrochemical transistors (OECTs), several advantageous characteristics can be utilized to improve transduction and circuit level performance for biosensing applications. Here, the subthreshold region of operation of one recently reported high performing OECT material, poly(2-(3,3'-bis(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-[2,2'-bithiophen]-5-yl)thieno[3,2- b ]thiophene), p(g2T-TT) is investigated. The material's high subthreshold slope (SS) is exploited for high voltage gain and low power consumption...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Feng Zhang, Ligui Xiong, Yongjian Ai, Zhe Liang, Qionglin Liang
Smart hydrogels with responsive behaviors have attracted tremendous attention. However, it is still a challenge to synthesize stretchable hydrogels capable of changing their original properties in response to multiple external stimuli. Here, integration of actuation function, shape memory, and self-healing capability in a highly stretchable hydrogel under triple external triggers is achieved by rationally engineering multiple functional moieties. The hydrogel exhibits high stretchability (average relative strain (mm/mm) is >15) and excellent fatigue resistance during 100 loading cycles of 100% strain...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Min Bao, Jing Xie, Wilhelm T S Huck
Conventional 2D cell culture techniques have provided fundamental insights into key biochemical and biophysical mechanisms responsible for various cellular behaviors, such as cell adhesion, spreading, division, proliferation, and differentiation. However, 2D culture in vitro does not fully capture the physical and chemical properties of the native microenvironment. There is a growing body of research that suggests that cells cultured on 2D substrates differ greatly from those grown in vivo. This article focuses on recent progress in using bioinspired 3D matrices that recapitulate as many aspects of the natural extracellular matrix as possible...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Simge G Yüz, Julia Ricken, Seraphine V Wegner
Independent control over multiple cell-material interactions with high spatiotemporal resolution is a key for many biomedical applications and understanding cell biology, as different cell types can perform different tasks in a multicellular context. In this study, the binding of two different cell types to materials is orthogonally controlled with blue and red light providing independent regulation in space and time. Cells expressing the photoswitchable protein cryptochrome 2 (CRY2) on cell surface bind to N-truncated CRY-interacting basic helix-loop-helix protein 1 (CIBN)-immobilized substrates under blue light and cells expressing the photoswitchable protein phytochrome B (PhyB ) on cell surface bind to phytochrome interaction factor 6 (PIF6)-immobilized substrates under red light, respectively...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Yiwei Zhang, Ifor D W Samuel, Tao Wang, David G Lidzey
Performance degradation is one of the key obstacles limiting the commercial application of organic photovoltaic (OPV) devices. The assessment of OPV stability and lifetime are usually based on simulated degradation experiments conducted under indoor conditions, whereas photovoltaic devices experience different environmental conditions under outdoor operation. Besides the intrinsic degradation of OPV devices due to the evolution of optoelectronic and morphological structure during long-term operation, outdoor environmental changes can impose extra stresses and accelerate the degradation of OPV modules...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Vasil N Georgiev, Andrea Grafmüller, David Bléger, Stefan Hecht, Sonja Kunstmann, Stefanie Barbirz, Reinhard Lipowsky, Rumiana Dimova
Biomembranes are constantly remodeled and in cells, these processes are controlled and modulated by an assortment of membrane proteins. Here, it is shown that such remodeling can also be induced by photoresponsive molecules. The morphological control of giant vesicles in the presence of a water-soluble ortho -tetrafluoroazobenzene photoswitch (F-azo) is demonstrated and it is shown that the shape transformations are based on an increase in membrane area and generation of spontaneous curvature. The vesicles exhibit budding and the buds can be retracted by using light of a different wavelength...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Yucong Yan, Xiao Li, Min Tang, Hao Zhong, Jingbo Huang, Ting Bian, Yi Jiang, Yu Han, Hui Zhang, Deren Yang
The important role of edge sites in atomically thin 2D materials serving as catalysts is already of concerned in plenty of material systems and catalytic reactions, whereas comprehensive study of the edge sites in 2D noble-metal nanocatalysts is still lacking. Herein, for the first time, a controllable etching approach to tailor the fractal dimensions and edge sites of Pd nanosheets is developed and the edge sites in these 2D nanostructures from both structural and chemical aspects are investigated. The as-tailored 2D Pd nanostructures with extra edge sites exhibit substantially enhanced electrocatalytic performance for the formic acid oxidation reaction (FAOR)...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Bin Liu, Bin He, Hui-Qing Peng, Yufei Zhao, Junye Cheng, Jing Xia, Jianhua Shen, Tsz-Wai Ng, Xiangmin Meng, Chun-Sing Lee, Wenjun Zhang
Development of high-performance and cost-effective non-noble metal electrocatalysts is pivotal for the eco-friendly production of hydrogen through electrolysis and hydrogen energy applications. Herein, the synthesis of an unconventional nickel nitride nanostructure enriched with nitrogen vacancies (Ni3 N1- x ) through plasma-enhanced nitridation of commercial Ni foam (NF) is reported. The self-supported Ni3 N1- x /NF electrode can deliver a hydrogen evolution reaction (HER) activity competitive to commercial Pt/C catalyst in alkaline condition (i...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Huan Feng, Zhiqiang Zhang, Qingtao Meng, Hongmin Jia, Yue Wang, Run Zhang
Diagnosis and early assessment of the treatment response of rheumatoid arthritis (RA) necessitates a reliable bioanalytical method for rapid, sensitive, and specific detection of the hypochlorous acid (HOCl) biomarker in inflammatory diseases. Herein, two fluorescence probes, Probe- 1 and Probe- 2 are developed for quantitative monitoring and visualization of inflammatory response-related HOCl levels in vitro and in vivo. In the presence of HOCl, fluorescence "OFF-ON" response is obtained for both the probes as a result of specific HOCl-triggered C=N bond cleavage reaction...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Shrikrishnan Sankaran, Shifang Zhao, Christina Muth, Julieta Paez, Aránzazu Del Campo
Living materials are an emergent material class, infused with the productive, adaptive, and regenerative properties of living organisms. Property regulation in living materials requires encoding responsive units in the living components to allow external manipulation of their function. Here, an optoregulated Escherichia coli (E. coli) -based living biomaterial that can be externally addressed using light to interact with mammalian cells is demonstrated. This is achieved by using a photoactivatable inducer of gene expression and bacterial surface display technology to present an integrin-specific miniprotein on the outer membrane of an endotoxin-free E...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Zhengjie Zhou, Pengfei Tian, Xiaoyan Liu, Shiliang Mei, Ding Zhou, Di Li, Pengtao Jing, Wanlu Zhang, Ruiqian Guo, Songnan Qu, Andrey L Rogach
It is demonstrated that treatment of blue-emissive carbon dots (CDs) with aqueous hydrogen peroxide (H2 O2 ) results in the green emissive solid state CD phosphor with photoluminescence quantum yield of 25% and short luminescence lifetime of 6 ns. The bathochromic-shifted, enhanced green emission of H2 O2 -treated CDs in the powder is ascribed to surface state changes occurring in the aggregated material. Using the green emissive H2 O2 -treated CD phosphor, down-conversion white-light-emitting devices with cool, pure, and warm white light are fabricated...
August 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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