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Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

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https://www.readbyqxmd.com/read/28435781/carbon-nanotubes-in-tio2-nanofiber-photoelectrodes-for-high-performance-perovskite-solar-cells
#1
Munkhbayar Batmunkh, Thomas J Macdonald, Cameron J Shearer, Munkhjargal Bat-Erdene, Yun Wang, Mark J Biggs, Ivan P Parkin, Thomas Nann, Joseph G Shapter
1D semiconducting oxides are unique structures that have been widely used for photovoltaic (PV) devices due to their capability to provide a direct pathway for charge transport. In addition, carbon nanotubes (CNTs) have played multifunctional roles in a range of PV cells because of their fascinating properties. Herein, the influence of CNTs on the PV performance of 1D titanium dioxide nanofiber (TiO2 NF) photoelectrode perovskite solar cells (PSCs) is systematically explored. Among the different types of CNTs, single-walled CNTs (SWCNTs) incorporated in the TiO2 NF photoelectrode PSCs show a significant enhancement (≈40%) in the power conversion efficiency (PCE) as compared to control cells...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435780/highly-active-and-stable-pt-pd-alloy-catalysts-synthesized-by-room-temperature-electron-reduction-for-oxygen-reduction-reaction
#2
Wei Wang, Zongyuan Wang, Jiajun Wang, Chuan-Jian Zhong, Chang-Jun Liu
Carbon-supported platinum (Pt) and palladium (Pd) alloy catalyst has become a promising alternative electrocatalyst for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. In this work, the synthesis of highly active and stable carbon-supported Pt-Pd alloy catalysts is reported with a room-temperature electron reduction method. The alloy nanoparticles thus prepared show a particle size around 2.6 nm and a core-shell structure with Pt as the shell. With this structure, the breaking of O-O bands and desorption of OH are both promoted in electrocatalysis of ORR...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435779/sodium-ion-batteries-improving-the-rate-capability-of-3d-interconnected-carbon-nanofibers-thin-film-by-boron-nitrogen-dual-doping
#3
Min Wang, Yang Yang, Zhenzhong Yang, Lin Gu, Qianwang Chen, Yan Yu
Boron, nitrogen dual-doping 3D hard carbon nanofibers thin film is synthesized using a facile process. The nanofibers exhibit high specific capacity and remarkable high-rate capability due to the synergistic effect of 3D porous structure, large surface area, and enlarged carbon layer spacing, and the B, N codoping-induced defects.
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435778/tumor-microenvironment-activable-self-assembled-dna-hybrids-for-ph-and-redox-dual-responsive-chemotherapy-pdt-treatment-of-hepatocellular-carcinoma
#4
Da Zhang, Aixian Zheng, Juan Li, Ming Wu, Zhixiong Cai, Lingjie Wu, Zuwu Wei, Huanghao Yang, Xiaolong Liu, Jingfeng Liu
Smart self-assembled "Turn-ON" DNA hybrids are employed, which could respond to tumor microenvironment stimuli for cancer cell specific real-time fluorescence imaging, tumor-specific synergistic photodynamic therapy and chemotherapy in hepatocellular carcinoma.
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435777/recent-progress-in-metal-organic-frameworks-for-applications-in-electrocatalytic-and-photocatalytic-water-splitting
#5
REVIEW
Wei Wang, Xiaomin Xu, Wei Zhou, Zongping Shao
The development of clean and renewable energy materials as alternatives to fossil fuels is foreseen as a potential solution to the crucial problems of environmental pollution and energy shortages. Hydrogen is an ideal energy material for the future, and water splitting using solar/electrical energy is one way to generate hydrogen. Metal-organic frameworks (MOFs) are a class of porous materials with unique properties that have received rapidly growing attention in recent years for applications in water splitting due to their remarkable design flexibility, ultra-large surface-to-volume ratios and tunable pore channels...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435776/-self-peel-off-transfer-produces-ultrathin-polyvinylidene-fluoride-based-flexible-nanodevices
#6
Yanlong Tai, Gilles Lubineau
Here, a new strategy, self-peel-off transfer, for the preparation of ultrathin flexible nanodevices made from polyvinylidene-fluoride (PVDF) is reported. In this process, a functional pattern of nanoparticles is transferred via peeling from a temporary substrate to the final PVDF film. This peeling process takes advantage of the differences in the work of adhesion between the various layers (the PVDF layer, the nanoparticle-pattern layer and the substrate layer) and of the high stresses generated by the differential thermal expansion of the layers...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435775/the-mechanical-properties-of-nanowires
#7
REVIEW
Shiliang Wang, Zhiwei Shan, Han Huang
Applications of nanowires into future generation nanodevices require a complete understanding of the mechanical properties of the nanowires. A great research effort has been made in the past two decades to understand the deformation physics and mechanical behaviors of nanowires, and to interpret the discrepancies between experimental measurements and theoretical predictions. This review focused on the characterization and understanding of the mechanical properties of nanowires, including elasticity, plasticity, anelasticity and strength...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435774/revelation-of-interfacial-energetics-in-organic-multiheterojunctions
#8
Christian Kästner, Koen Vandewal, Daniel Ayuk Mbi Egbe, Harald Hoppe
Efficient charge generation via exciton dissociation in organic bulk heterojunctions necessitates donor-acceptor interfaces, e.g., between a conjugated polymer and a fullerene derivative. Furthermore, aggregation and corresponding structural order of polymer and fullerene domains result in energetic relaxations of molecular energy levels toward smaller energy gaps as compared to the situation for amorphous phases existing in homogeneously intermixed polymer:fullerene blends. Here it is shown that these molecular energy level shifts are reflected in interfacial charge transfer (CT) transitions and depending on the existence of disordered or ordered interfacial domains...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435773/giant-faraday-rotation-through-ultrasmall-fe-0-n-clusters-in-superparamagnetic-feo-sio2-vitreous-films
#9
Yuko Nakatsuka, Kilian Pollok, Torsten Wieduwilt, Falko Langenhorst, Markus A Schmidt, Koji Fujita, Shunsuke Murai, Katsuhisa Tanaka, Lothar Wondraczek
Magnetooptical (MO) glasses and, in particular, Faraday rotators are becoming key components in lasers and optical information processing, light switching, coding, filtering, and sensing. The common design of such Faraday rotator materials follows a simple path: high Faraday rotation is achieved by maximizing the concentration of paramagnetic ion species in a given matrix material. However, this approach has reached its limits in terms of MO performance; hence, glass-based materials can presently not be used efficiently in thin film MO applications...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435772/self-assembled-bifunctional-peptide-as-effective-drug-delivery-vector-with-powerful-antitumor-activity
#10
Rangrang Fan, Lan Mei, Xiang Gao, Yuelong Wang, Mingli Xiang, Yu Zheng, Aiping Tong, Xiaoning Zhang, Bo Han, Liangxue Zhou, Peng Mi, Chao You, Zhiyong Qian, Yuquan Wei, Gang Guo
E-cadherin/catenin complex is crucial for cancer cell migration and invasion. The histidine-alanine-valine (HAV) sequence has been shown to inhibit a variety of cadherin-based functions. In this study, by fusing HAV and the classical tumor-targeting Arg-Gly-Asp (RGD) motif and Asn-Gly-Arg (NGR) motif to the apoptosis-inducing peptide sequence-AVPIAQK, a bifunctional peptide has been constructed with enhanced tumor targeting and apoptosis effects. This peptide is further processed as a nanoscale vector to encapsulate the hydrophobic drug docetaxel (DOC)...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435771/brown-adipose-tissue-bioenergetics-a-new-methodological-approach
#11
María Calderon-Dominguez, Martín Alcalá, David Sebastián, Antonio Zorzano, Marta Viana, Dolors Serra, Laura Herrero
The rediscovery of brown adipose tissue (BAT) in humans and its capacity to oxidize fat and dissipate energy as heat has put the spotlight on its potential as a therapeutic target in the treatment of several metabolic conditions including obesity and diabetes. To date the measurement of bioenergetics parameters has required the use of cultured cells or extracted mitochondria with the corresponding loss of information in the tissue context. Herein, we present a method to quantify mitochondrial bioenergetics directly in BAT...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435770/thermally-activated-delayed-fluorescence-organic-dots-tadf-odots-for-time-resolved-and-confocal-fluorescence-imaging-in-living-cells-and-in-vivo
#12
Tingting Li, Dongliang Yang, Liuqing Zhai, Suiliang Wang, Baomin Zhao, Nina Fu, Lianhui Wang, Youtian Tao, Wei Huang
The fluorophores with long-lived fluorescent emission are highly desirable for time-resolved fluorescence imaging (TRFI) in monitoring target fluorescence. By embedding the aggregates of a thermally activated delayed fluorescence (TADF) dye, 2,3,5,6-tetracarbazole-4-cyano-pyridine (CPy), in distearoyl-sn-glycero-3-phosphoethanolamine-poly(ethylene glycol) (DSPE-PEG2000) matrix, CPy-based organic dots (CPy-Odots) with a long fluorescence lifetime of 9.3 μs (in water at ambient condition) and high brightness (with an absolute fluorescence quantum efficiency of 38...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331792/advanced-micro-nanostructures-for-lithium-metal-anodes
#13
REVIEW
Rui Zhang, Nian-Wu Li, Xin-Bing Cheng, Ya-Xia Yin, Qiang Zhang, Yu-Guo Guo
Owning to their very high theoretical capacity, lithium metal anodes are expected to fuel the extensive practical applications in portable electronics and electric vehicles. However, unstable solid electrolyte interphase and lithium dendrite growth during lithium plating/stripping induce poor safety, low Coulombic efficiency, and short span life of lithium metal batteries. Lately, varies of micro/nanostructured lithium metal anodes are proposed to address these issues in lithium metal batteries. With the unique surface, pore, and connecting structures of different nanomaterials, lithium plating/stripping processes have been regulated...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331791/one-dimensional-earth-abundant-nanomaterials-for-water-splitting-electrocatalysts
#14
REVIEW
Jun Li, Gengfeng Zheng
Hydrogen fuel acquisition based on electrochemical or photoelectrochemical water splitting represents one of the most promising means for the fast increase of global energy need, capable of offering a clean and sustainable energy resource with zero carbon footprints in the environment. The key to the success of this goal is the realization of robust earth-abundant materials and cost-effective reaction processes that can catalyze both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with high efficiency and stability...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331790/ultrathin-fluidic-laminates-for-large-area-fa%C3%A3-ade-integration-and-smart-windows
#15
Benjamin P V Heiz, Zhiwen Pan, Gerhard Lautenschläger, Christin Sirtl, Matthias Kraus, Lothar Wondraczek
Buildings represent more than 40% of Europe's energy demands and about one third of its CO2 emissions. Energy efficient buildings and, in particular, building skins have therefore been among the key priorities of international research agendas. Here, glass-glass fluidic devices are presented for large-area integration with adaptive façades and smart windows. These devices enable harnessing and dedicated control of various liquids for added functionality in the building envelope. Combining a microstructured glass pane, a thin cover sheet with tailored mechanical performance, and a liquid for heat storage and transport, a flat-panel laminate is generated with thickness adapted to a single glass sheet in conventional windows...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331789/light-like-a-feather-a-fibrous-natural-composite-with-a-shape-changing-from-round-to-square
#16
Bin Wang, Marc André Meyers
Only seldom are square/rectangular shapes found in nature. One notable exception is the bird feather rachis, which raises the question: why is the proximal base round but the distal end square? Herein, it is uncovered that, given the same area, square cross sections show higher bending rigidity and are superior in maintaining the original shape, whereas circular sections ovalize upon flexing. This circular-to-square shape change increases the ability of the flight feathers to resist flexure while minimizes the weight along the shaft length...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331788/periodic-mesoporous-organosilica-coated-prussian-blue-for-mr-pa-dual-modal-imaging-guided-photothermal-chemotherapy-of-triple-negative-breast-cancer
#17
Wei Tian, Yunyan Su, Ying Tian, Shouju Wang, Xiaodan Su, Ying Liu, Yunlei Zhang, Yuxia Tang, Qianqian Ni, Wenfei Liu, Meng Dang, Chunyan Wang, Junjie Zhang, Zhaogang Teng, Guangming Lu
Complete eradication of highly aggressive triple negative breast cancer (TNBC) remains a notable challenge today. In this work, an imaging-guided photothermal-chemotherapy strategy for TNBC is developed for the first time based on a periodic mesoporous organosilica (PMO) coated Prussian blue (PB@PMO) nanoplatform. The PB@PMOs have organic-inorganic hybrid frameworks, uniform diameter (125 nm), high surface area (866 m(2) g(-1)), large pore size (3.2 nm), excellent photothermal conversion capability, high drug loading capacity (260 µg mg(-1)), and magnetic resonance (MR) and photoacoustic (PA) imaging abilities...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331787/enhancing-oxygen-evolution-reaction-at-high-current-densities-on-amorphous-like-ni-fe-s-ultrathin-nanosheets-via-oxygen-incorporation-and-electrochemical-tuning
#18
Jingfang Zhang, Yuchen Hu, Dali Liu, Yu Yu, Bin Zhang
Amorphous-like Ni-Fe-S ultrathin nanosheets by oxygen incorporation and electrochemical tuning show excellent OER activity at high current densities. Such excellent performance could be attributed to the unique 3D porous configuration composed of amorphous-like ultrathin nanosheets with much more active sites and improved conductivity, as well as the proper electronic structure benefiting from the oxygen incorporation and electrochemical tuning.
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331786/a-3d-chemically-modified-graphene-hydrogel-for-fast-highly-sensitive-and-selective-gas-sensor
#19
Jin Wu, Kai Tao, Yuanyuan Guo, Zhong Li, Xiaotian Wang, Zhongzhen Luo, Shuanglong Feng, Chunlei Du, Di Chen, Jianmin Miao, Leslie K Norford
Reduced graphene oxide (RGO) has proved to be a promising candidate in high-performance gas sensing in ambient conditions. However, trace detection of different kinds of gases with simultaneously high sensitivity and selectivity is challenging. Here, a chemiresistor-type sensor based on 3D sulfonated RGO hydrogel (S-RGOH) is reported, which can detect a variety of important gases with high sensitivity, boosted selectivity, fast response, and good reversibility. The NaHSO3 functionalized RGOH displays remarkable 118...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28331785/an-enhanced-uv-vis-nir-an-d-flexible-photodetector-based-on-electrospun-zno-nanowire-array-pbs-quantum-dots-film-heterostructure
#20
Zhi Zheng, Lin Gan, Jianbing Zhang, Fuwei Zhuge, Tianyou Zhai
ZnO nanostructure-based photodetectors have a wide applications in many aspects, however, the response range of which are mainly restricted in the UV region dictated by its bandgap. Herein, UV-vis-NIR sensitive ZnO photodetectors consisting of ZnO nanowires (NW) array/PbS quantum dots (QDs) heterostructures are fabricated through modified electrospining method and an exchanging process. Besides wider response region compared to pure ZnO NWs based photodetectors, the heterostructures based photodetectors have faster response and recovery speed in UV range...
March 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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