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Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

Qiyao Yu, Bo Jiang, Jun Hu, Cheng-Yen Lao, Yunzhi Gao, Peihao Li, Zhiwei Liu, Guoquan Suo, Donglin He, Wei Alex Wang, Geping Yin
Due to the abundant and low-cost K resources, the exploration of suitable materials for potassium-ion batteries (KIBs) is advancing as a promising alternative to lithium-ion batteries. However, the large-sized and sluggish-kinetic K ions cause poor battery behavior. This work reports a metallic octahedral CoSe2 threaded by N-doped carbon nanotubes as a flexible framework for a high-performance KIBs anode. The metallic property of CoSe2 together with the highly conductive N-doped carbon nanotubes greatly accelerates the electron transfer and improves the rate performance...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Mohammad Z Rahman, Kenneth Davey, C Buddie Mullins
The low quantum yield of photocatalytic hydrogen production in carbon nitride (CN) has been improved upon via the modulation of both the extrinsic and intrinsic properties of the material. Although the modification of extrinsic properties has been widely investigated in the past, recently there has been growing interest in the alteration of intrinsic properties. Refining the intrinsic properties of CN provides flexibility in controlling the charge transport and selectivity in photoredox reactions, and therefore makes available a pathway toward superior photocatalytic performance...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Yi-Jiun Chen, Wei-Kai Lee, Yi-Ting Chen, Chun-Yu Lin, Sheng-Wen Wen, Min Jiao, Guo-Dong Su, Hoang Yan Lin, Robert J Visser, Byungsung Leo Kwak, Chung-Chia Chen, Wan-Yu Lin, Steve Wang, Chorng-Ping Chang, Chung-Chih Wu
Despite stringent power consumption requirements in many applications, over years organic light-emitting diode (OLED) displays still suffer unsatisfactory energy efficiency due to poor light extraction. Approaches have been reported for OLED light out-coupling, but they in general are not applicable for OLED displays due to difficulties in display image quality and fabrication complexity and compatibility. Thus to date, an effective and feasible light extraction technique that can boost efficiencies and yet keep image quality is still lacking and remains a great challenge...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Dan-Dan Pei, Jin-Long Sun, Chun-Hui Zhu, Fu-Cong Tian, Kai Jiao, Matthew R Anderson, Cynthia Yiu, Cui Huang, Chang-Xiong Jin, Brian E Bergeron, Ji-Hua Chen, Franklin R Tay, Li-Na Niu
Biomineralization in vertebrates is initiated via amorphous calcium phosphate (ACP) precursors. These precursors infiltrate the extracellular collagen matrix where they undergo phase transformation into intrafibrillar carbonated apatite. Although it is well established that ACP precursors are released from intracellular vesicles through exocytosis, an unsolved enigma in this cell-mediated mineralization process is how ACP precursors, initially produced in the mitochondria, are translocated to the intracellular vesicles...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Qiang Su, Yizhe Sun, Heng Zhang, Shuming Chen
The phenomenon of positive aging, i.e., efficiency increased with time, is observed in quantum-dot light-emitting diodes (QLEDs). For example, the external quantum efficiency (EQE) of blue QLEDs is significantly improved from 4.93% to 12.97% after storage for 8 d. The origin of such positive aging is thoroughly investigated. The finding indicates that the interfacial reaction between Al cathode and ZnMgO electron transport layer accounts for such improvement. During shelf-aging, the Al slowly reacts with the oxygen from ZnMgO, and consequently, leads to the formation of AlO x and the production of oxygen vacancies in ZnMgO...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Omar Benzine, Sebastian Bruns, Zhiwen Pan, Karsten Durst, Lothar Wondraczek
Microscopic deformation processes determine defect formation on glass surfaces and, thus, the material's resistance to mechanical failure. While the macroscopic strength of most glasses is not directly dependent on material composition, local deformation and flaw initiation are strongly affected by chemistry and atomic arrangement. Aside from empirical insight, however, the structural origin of the fundamental deformation modes remains largely unknown. Experimental methods that probe parameters on short or intermediate length-scale such as atom-atom or superstructural correlations are typically applied in the absence of alternatives...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Jayoung Kim, Juliane R Sempionatto, Somayeh Imani, Martin C Hartel, Abbas Barfidokht, Guangda Tang, Alan S Campbell, Patrick P Mercier, Joseph Wang
The development of wearable biosensors for continuous noninvasive monitoring of target biomarkers is limited to assays of a single sampled biofluid. An example of simultaneous noninvasive sampling and analysis of two different biofluids using a single wearable epidermal platform is demonstrated here. The concept is successfully realized through sweat stimulation (via transdermal pilocarpine delivery) at an anode, alongside extraction of interstitial fluid (ISF) at a cathode. The system thus allows on-demand, controlled sampling of the two epidermal biofluids at the same time, at two physically separate locations (on the same flexible platform) containing different electrochemical biosensors for monitoring the corresponding biomarkers...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Mehdi Mehrali, Sara Bagherifard, Mohsen Akbari, Ashish Thakur, Bahram Mirani, Mohammad Mehrali, Masoud Hasany, Gorka Orive, Paramita Das, Jenny Emneus, Thomas L Andresen, Alireza Dolatshahi-Pirouz
At the crossroads of chemistry, electronics, mechanical engineering, polymer science, biology, tissue engineering, computer science, and materials science, electrical devices are currently being engineered that blend directly within organs and tissues. These sophisticated devices are mediators, recorders, and stimulators of electricity with the capacity to monitor important electrophysiological events, replace disabled body parts, or even stimulate tissues to overcome their current limitations. They are therefore capable of leading humanity forward into the age of cyborgs, a time in which human biology can be hacked at will to yield beings with abilities beyond their natural capabilities...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Li-Ming Cao, Yu-Wen Hu, Shang-Feng Tang, Andrey Iljin, Jia-Wei Wang, Zhi-Ming Zhang, Tong-Bu Lu
Industrial application of overall water splitting requires developing readily available, highly efficient, and stable oxygen evolution electrocatalysts that can efficiently drive large current density. This study reports a facile and practical method to fabricate a non-noble metal catalyst by directly growing a Co-Fe Prussian blue analogue on a 3D porous conductive substrate, which is further phosphorized into a bifunctional Fe-doped CoP (Fe-CoP) electrocatalyst. The Fe-CoP/NF (nickel foam) catalyst shows efficient electrocatalytic activity for oxygen evolution reaction, requiring low overpotentials of 190, 295, and 428 mV to achieve 10, 500, and 1000 mA cm-2 current densities in 1...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Dong-Yang Zhang, Yue Zheng, Hang Zhang, Jing-Hua Sun, Cai-Ping Tan, Liang He, Wei Zhang, Liang-Nian Ji, Zong-Wan Mao
Recently, phosphorescent iridium complexes have demonstrated great potential as anticancer and imaging agents. Dopamine is a melanin-like mimic of mussel adhesive protein that can self-polymerize to form polydopamine (PDA) nanoparticles that demonstrate favorable biocompatibility, near-infrared absorption, and photothermal effects. Herein, PDA nanoparticles are functionalized with β-cyclodextrin (CD) substitutions, which are further assembled with adamantane-modified arginine-glycine-aspartic acid (Ad-RGD) tripeptides to target integrin-rich tumor cells...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Mitsuru Ando, Shun Schikula, Yoshihiro Sasaki, Kazunari Akiyoshi
Integral membrane proteins (IMPs) modulate key cellular processes; their dysfunctions are closely related to disease. However, production of IMPs in active conformations for further study is hindered by aggregation and toxicity in living expression systems. IMPs are therefore produced in cell-free systems employing liposome chaperoning, but membrane integration of the nascent IMPs is suboptimal and orientation of the integrated proteins remains uncontrollable. Thus, an artificial membrane protein sorting system is developed, based on polyhistidine/nickel-chelate affinity, combined with cell-free membrane protein synthesis...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Zhe Chen, Wanying Chen, Dashuang Jia, Yang Liu, Anrui Zhang, Tao Wen, Jian Liu, Yuejie Ai, Weiguo Song, Xiangke Wang
The development of functional materials for the highly efficient capture of radionuclides, such as uranium from nuclear waste solutions, is an important and challenging topic. Here, few-layered N, P, and S codoped graphene-like carbon nanosheets (NPS-GLCs) that are fabricated in the 2D confined spacing of silicate RUB-15 and applied as sorbents to remove U(VI)ions from aqueous solutions are presented. The NPS-GLCs exhibit a large capacity, wide pH suitability, an ultrafast removal rate, stability at high ionic strengths, and excellent selectivity for U(VI) as compared to multiple competing metal ions...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Chang Xu, Qishuai Feng, Haocheng Yang, Guangxue Wang, Liqun Huang, Qianwen Bai, Chuyi Zhang, Yilong Wang, Yingna Chen, Qian Cheng, Mengwei Chen, Yu Han, Zuoren Yu, Maciej S Lesniak, Yu Cheng
Targeted therapy is highly challenging and urgently needed for patients diagnosed with triple negative breast cancer (TNBC). Here, a synergistic treatment platform with plasmonic-magnetic hybrid nanoparticle (lipids, doxorubicin (DOX), gold nanorods, iron oxide nanocluster (LDGI))-loaded mesenchymal stem cells (MSCs) for photoacoustic imaging, targeted photothermal therapy, and chemotherapy for TNBC is developed. LDGI can be efficiently taken up into the stem cells with good biocompatibility to maintain the cellular functions...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Zhimin Fan, Youshan Wang, Zhimin Xie, Duola Wang, Yin Yuan, Hongjun Kang, Benlong Su, Zhongjun Cheng, Yuyan Liu
MXene films are attractive for advanced supercapacitor electrodes requiring high volumetric energy density due to their high redox capacitance combined with extremely high packing density. However, the self-restacking of MXene flakes unavoidably decreases the volumetric performance, mass loading, and rate capability. Herein, a simple strategy is developed to prepare a flexible and free-standing modified MXene/holey graphene film by filtration of the alkalized MXene and holey graphene oxide dispersions, followed by a mild annealing treatment...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Arthur Hirsch, Stéphanie P Lacour
Several methods are proposed to manipulate and pattern liquid metal films into elastic conductors but all lack precise control over the film thickness and roughness, thereby limiting its uniformity, stability, and reproducibility. Here, an approach relying solely on wetting phenomena is proposed to produce smooth film of liquid gallium (Ga) on extended surface areas with controlled thickness and electrical properties. The surface chemistry and topography of silicone rubber (poly(dimethylsiloxane)) is engineered with microstructured pillars and gold precoating layer to produce Ga superlyophilic substrates...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Shude Liu, Ying Yin, Kwan San Hui, Kwun Nam Hui, Su Chan Lee, Seong Chan Jun
Flexible quasi-/all-solid-state supercapacitors have elicited scientific attention to fulfill the explosive demand for portable and wearable electronic devices. However, the use of electrode materials faces several challenges, such as intrinsically slow kinetics and volume change upon cycling, which impede the energy output and electrochemical stability. This study presents well-aligned molybdenum dioxide@nitrogen-doped carbon (MoO2 @NC) and copper cobalt sulfide (CuCo2 S4 ) tubular nanostructures grown on flexible carbon fiber for use as electrode materials in supercapacitors...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Lanlan Li, Jiawei Guo, Yuquan Wang, Xiaoxing Xiong, Hui Tao, Jin Li, Yi Jia, Houyuan Hu, Jianxiang Zhang
Despite the great potential of numerous antioxidants for pharmacotherapy of diseases associated with inflammation and oxidative stress, many challenges remain for their clinical translation. Herein, a superoxidase dismutase/catalase-mimetic material based on Tempol and phenylboronic acid pinacol ester simultaneously conjugated β-cyclodextrin (abbreviated as TPCD), which is capable of eliminating a broad spectrum of reactive oxygen species (ROS), is reported. TPCD can be easily synthesized by sequentially conjugating two functional moieties onto a β-cyclodextrin scaffold...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Ming Zhang, Mingbo Pu, Fei Zhang, Yinghui Guo, Qiong He, Xiaoliang Ma, Yijia Huang, Xiong Li, Honglin Yu, Xiangang Luo
Metasurfaces with intense spin-orbit interactions (SOIs) offer an appealing platform for manipulation of polarization and wavefront. Reconfigurable beam manipulation based on switchable SOIs is highly desired in many occasions, but it remains a great challenge since most metasurfaces lack the flexibility and the optical performance is fixed once fabricated. Here, switchable SOIs are demonstrated numerically and experimentally via the combination of plasmonic metasurfaces with phase change materials (PCMs). As a proof-of-concept, three metadevices possessing switchable SOIs are fabricated and investigated, which enable spin Hall effect, vortex beam generation, and holography when the PCM is in the amorphous state (corresponding to the "ON" state of SOI)...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Xiaowei Zeng, Miaomiao Luo, Gan Liu, Xusheng Wang, Wei Tao, Yaoxin Lin, Xiaoyuan Ji, Lin Nie, Lin Mei
As a novel 2D material, black phosphorus (BP) nanosheets are considered as a promising candidate for drug delivery platform for synergistic chemo/photothermal therapy. However, the intrinsic instability of bare BP poses a challenge in its biomedical applications. To date, some strategies have been employed to prevent BP from rapid ambient degradation. Unfortunately, most of these strategies are not suitable for the drug delivery systems. Here, a simple polydopamine modification method is developed to enhance the stability and photothermal performance of bare BP nanosheets...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Mi Gyoung Lee, Kyoungsuk Jin, Ki Chang Kwon, Woonbae Sohn, Hoonkee Park, Kyoung Soon Choi, Yoo Kyung Go, Hongmin Seo, Jung Sug Hong, Ki Tae Nam, Ho Won Jang
The band edge positions of semiconductors determine functionality in solar water splitting. While ligand exchange is known to enable modification of the band structure, its crucial role in water splitting efficiency is not yet fully understood. Here, ligand-engineered manganese oxide cocatalyst nanoparticles (MnO NPs) on bismuth vanadate (BiVO4 ) anodes are first demonstrated, and a remarkably enhanced photocurrent density of 6.25 mA cm-2 is achieved. It is close to 85% of the theoretical photocurrent density (≈7...
October 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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