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ACS Applied Materials & Interfaces

Xueliang Zhang, Xin Wang, Defa Wang, Jinhua Ye
Constructing semiconductor heterojunctions via surface/interface engineering is an effective way to enhance the charge carrier separation/transport ability and thus the photoelectrochemical (PEC) properties of a photoelectrode. Herein, we report a conformal BiVO4 -layer/WO3 -nanoplate-array heterojunction photoanode modified with cobalt phosphate (Co-Pi) as oxygen evolution cocatalyst (OEC) for significant enhancement in PEC performances. The BiVO4 /WO3 nanocomposite is fabricated by coating a thin conformal BiVO4 layer on the surface of presynthesized WO3 nanoplate arrays (NPAs) via stepwise spin-coating, and the decoration of Co-Pi OEC is realized by photoassisted electrodeposition method...
July 13, 2018: ACS Applied Materials & Interfaces
Xiaoqian Li, Weihua Cai, Kwok Siong Teh, Mingjing Qi, Xining Zang, Xinrui Ding, Yong Cui, Yingxi Xie, Yichuan Wu, Hongyu Ma, Zaifa Zhou, Qing-An Huang, Jianshan Ye, Liwei Lin
High-voltage energy storage devices are quite commonly needed for robots and dielectric elastomers. This paper presents a flexible high-voltage microsupercapacitor (MSC) with a planar in-series architecture for the first time based on laser-induced graphene. The high-voltage devices are capable of supplying output voltages ranging from a few to thousands of volts. The measured capacitances for the 1 V, 3 V and 6 V MSCs were 60.5 μF, 20.7 μF and 10.0 μF, respectively under an applied current of 1.0 μA. After the 5000-cycle charge-discharge test, the 6 V MSC retained about 97...
July 13, 2018: ACS Applied Materials & Interfaces
Mingyu Zhang, John T W Yeow
In this work, we report a wearable thermal detector based on Poly vinyl alcohol (PVA) and Carbon nanotubes (CNT) composite via photo-thermoelectric effect. Passive room temperature human-body thermal imaging is demonstrated with optimum detectivity up to 4.9×106 cm Hz1/2 W-1. Highly stable photo-response (variation<4 %) is obtained under bending radius down to 3.5 mm. We also found the detector photo-response is influenced by the composite channel length due to Seebeck effect. This flexible, self-powered and sensitive detector opens up opportunities for wearable thermal imaging and real-time health monitoring...
July 13, 2018: ACS Applied Materials & Interfaces
Zhuoxuan Lu, Feng-Ying Huang, Rong Cao, Guang-Hong Tan, Guohui Yi, Nongyue He, Lingfeng Xu, Liming Zhang
Nano-agent-mediated photothermal therapy (PTT) combined with chemotherapy has been proposed as an effective strategy against cancer. However, chemotherapeutic agents often cause serious side effects. Herein, a novel PTT nanoagent (Cy5.5-MSA-G250) with unanticipated intrinsic tumor-selective cytotoxicity is developed. The Cy5.5-MSA-G250 nanoparticles (NPs) are created by mixing mouse serum albumin (MSA) and coomassie brilliant blue (G250), and then conjugated with cyanine 5.5 (Cy5.5). As expected, Cy5.5-MSA-G250 NPs can efficiently kill cancer cells in vitro and in vivo by PTT...
July 13, 2018: ACS Applied Materials & Interfaces
Yuanming Liu, Xianying Qin, Shaoqiong Zhang, Gemeng Liang, Feiyu Kang, Guohua Chen, Baohua Li
Lithium-sulfur (Li-S) batteries are seriously restrained by the shuttling effect of intermediary products and their further reduction on the anode surface. Considerable researches have been devoted to overcoming these issues by introducing carbon-based materials as the sulfur host or interlayer in Li-S systems. Herein, we constructed a multifunctional interlayer on separator by inserting Fe3O4 nano-particles (NPs) in porous graphene (PG) film to immobilize polysulfides effectively. The porous structure of graphene was optimized by controlling the oxidation conditions for facilitating ion transfer...
July 13, 2018: ACS Applied Materials & Interfaces
D Praveen Kumar, Eun Hwa Kim, Hanbit Park, So Yeon Chun, Madhusudana Gopannagari, Palagiri Bhavani, D Amaranatha Reddy, Jae Kyu Song, Tae Kyu Kim
Transition metal dichalcogenide materials play a major role in state-of-the-art innovations for energy conversion because of potential applications resulting from their unique properties. These materials also show great promise towards the development of clean power sources to address growing environmental issues at a time of skyrocketing energy demands. Herein, we report earth-abundant, few-layered, MoSe2 -bridged MoS2 /CdS nanocomposites, which reduce photogenerated electron and hole recombination by effectively separating charge carriers to achieve a high photocatalytic efficiency...
July 13, 2018: ACS Applied Materials & Interfaces
Mingru Bai, Jing Xie, Xiaoyu Liu, Xia Chen, Wenjing Liu, Fanzi Wu, Dian Chen, Yimin Sun, Xin Li, Chenglin Wang, Ling Ye
The mechanical stiffness of substrates is recognized to be an important physical cue in the microenvironment of local cellular residents in mammalian species due to its great capacity in regulating cell behavior. Dental papilla cells (DPCs) play an important role in the field of dental tissue engineering for their stem cell-like properties. Therefore, it is essential to provide the suitable microenvironment by combining with the physical cues of biomaterials for DPCs to carry out the function of effective tissue regeneration...
July 13, 2018: ACS Applied Materials & Interfaces
Chao Zhang, Zhi-Cheng Shi, Fan Mao, Chaoqiang Yang, Xiao-Tong Zhu, Jie Yang, Heng Zuo, Runhua Fan
Intrinsic metamaterials with negative-k that originated from random-structured materials have drawn increasing attention. Currently, intrinsic negative-k was mainly achieved in percolative composites by tailoring the compositions and microstructures. Herein, plasma-like negative-k was successfully achieved in MWCNT/PI nanocomposites via applying external DC bias which exhibited excellent capability in conveniently and accurately adjusting negative-k. Mechanism analysis indicated that the localized charges at the interfaces between MWCNT and PI became delocalized after gaining energy from DC bias, resulting in elevated concentration of delocalized charges, hence the enhanced negative-k...
July 13, 2018: ACS Applied Materials & Interfaces
Kayeon Keum, Geumbee Lee, Hanchan Lee, Junyeong Yun, Heun Park, Soo Yeong Hong, Changhoon Song, Jung Wook Kim, Jeong Sook Ha
Wire-shaped supercapacitor (WSS) has structural advantages of high flexibility and ease of incorporation into conventional textile substrates. In this work, we report a thin, reproducible WSS fabricated via layer-by-layer (LbL) assembly of multi-walled carbon nanotubes (MWCNTs), combined with organic electrolyte of propylene carbonate (PC) - acetonitrile (ACN) - lithium perchlorate (LiClO4) - poly-(methyl methacrylate) (PMMA) that extends the voltage window to 1.6 V. MWCNTs were uniformly deposited on a curved surface of a thin Au wire using LbL assembly technique, resulting in linearly increased areal capacitance of the fabricated WSS...
July 13, 2018: ACS Applied Materials & Interfaces
Lirui Nan, Wenbo Yue
Porous carbon materials have attracted considerable attention for their various applications such as catalyst supports for fuel cells. However, few studies focus on the effect of carbon pore structure on different alcohols electrooxidation. In this work, platinum@nitrogen-doped carbon nanospheres with tailored mesopores (Pt@NMCs) are fabricated and exhibit outstanding electrocatalytic activity and durability for alcohol oxidation owing to the structural advantages such as adjustable mesopores, N-doped carbon and embedded catalysts...
July 13, 2018: ACS Applied Materials & Interfaces
Qin Zhao, Yuhang Zhang, Guiru Sun, Lina Cong, Li-Qun Sun, Haiming Xie, Jia Liu
The development of a long-term stable electrolyte is a challenge to be solved in the field of Li-O2 batteries. Equally, high flammability of the frequently-used solvents seriously weaken the electrolyte safety, which inevitably restricts the practical applications of Li-O2 batteries. Here, binary mixtures of highly concentrated tetraglyme electrolyte (HCG4) and 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether (TTE) was used as a novel electrolyte (HCG4/TTE) for the Li-O2 battery, which exhibits good wettability, enhanced ionic conductivity, considerable non-flammability, and high electrochemical stability...
July 13, 2018: ACS Applied Materials & Interfaces
Seung-Hwan Kim, Gwang-Sik Kim, June Park, Changmin Lee, Hyoungsub Kim, Jiyoung Kim, Joon Hyung Shim, Hyun-Yong Yu
In the post-Moore era, it is well known that contact resistance has been a critical issue in determining the performance of complementary metal-oxide-semiconductor (CMOS) reaching physical limits. Conventional Ohmic contact techniques, however, have hindered rather than helped the development of CMOS technology reaching its limits of scaling. Here, a novel conductive filament metal-interlayer-semiconductor (CF-MIS) contact-which achieves ultra-low contact resistance by generating CFs and lowering Schottky barrier height (SBH)-is investigated for potential applications in various nanodevices in lieu of conventional Ohmic contacts...
July 13, 2018: ACS Applied Materials & Interfaces
Christopher C Bowland, Ngoc A Nguyen, Amit K Naskar
This work provides a proof of principle that a high volume, continuous through-put fiber coating process can be used to integrate semiconducting nanoparticles on carbon fiber surfaces to create multifunctional composites. By embedding silicon carbide nanoparticles in the fiber sizing, subsequent composite fabrication methods are used to create unidirectional fiber reinforced composites with enhanced structural health monitoring (SHM) sensitivity and increased interlaminar strength. Additional investigations into the mechanical damping behavior of these functional composites reveals significantly increased loss factor at the glass transition temperature ranging from a 65% to 257% increase...
July 13, 2018: ACS Applied Materials & Interfaces
Jian Wang, Mizuki Tenjimbayashi, Yuki Tokura, Jun-Yong Park, Koki Kawase, Jiatu Li, Seimei Shiratori
In recent years, wearable and flexible sensors have attracted considerable research interest and effort is owing to their broad application prospects in wearable devices, robotics, health monitoring, and so on. High sensitivity and low-cost pressure sensors are the primary problems to be solved in practical application. Herein, a convenient and low-cost process to fabricate bionic fish-scale structures polydimethylsiloxane (PDMS) film via air/water interfacial formation technique is presented. High-sensitivity flexible pressure sensors can be constructed by assembling conductive films of graphene nanosheets (GNPs) into a microstructured film...
July 13, 2018: ACS Applied Materials & Interfaces
Jinfa Chang, Kai Li, Zhijian Wu, Junjie Ge, Changpeng Liu, Wei Xing
Searching for cost-efficient electrocatalysts with high catalytic activity and stability for hydrogen generation by means of water electrolysis would make a great improvement on energy technologies field. Herein, we report a high performance hydrogen evolution reaction (HER) electrocatalysts based on sulfur doped Ni5P4 nanoplate arrays grown on carbon paper (S-Ni5P4 NPA/CP). This ternary, robust, monolithic S-Ni5P4 NPA/CP exhibits remarkable performance for HER compared to nickel phosphide and nickel sulfide catalysts...
July 13, 2018: ACS Applied Materials & Interfaces
Meiqian Tai, Xingyue Zhao, Haoming Wei, Guang Wang, Feng Hao, Xin Li, Xuewen Yin, Yu Zhou, Jianhua Han, Yang Wei, Kaili Jiang, Hong Lin
Organic-inorganic hybrid perovskites have emerging as promising light harvesting materials for high efficiency solar cells recently. Compared to solution-based methods, vapor-based deposition technologies are more suitable in preparing compact, uniform and large-scale perovskite thin films. Here, we utilized flash-evaporation printing (FEP), a laser induced ultrafast single source evaporation method employing a carbon nanotube (CNT) evaporator, to fabricate high quality methylammonium lead iodide perovskite thin films...
July 13, 2018: ACS Applied Materials & Interfaces
Xudong Hou, Tingting Xu, Yang Wang, Shengjun Liu, Runrun Chu, Junxiang Zhang, Bo Liu
We reported integration of conductivity, chirality and porosity into MIL-101@chiral-PANI composite for synchronous chiral recognition, adsorption and sensing towards enantiomers. Core-shell structure of MIL-101@chiral-PANI was characterized in details by FTIR and CD spectra as well as SEM and TEM. Adsorption behaviors of carvone enantiomers over chiral PANI and MIL-101@chiral-PANI are satisfied with pseudo-first order fitting. In comparison with chiral PANI, MIL-101@c-PANI exhibits a better enantioselectivity and much higher (> 5 fold) adsorption amount over L-carvone than D-carvone...
July 13, 2018: ACS Applied Materials & Interfaces
Takaya Kubodera, Masaki Yabusaki, Vanadian Astari Suci Atina Rachmat, Yujin Cho, Toshihiro Yamanari, Yuji Yoshida, Nobuhiko Kobayashi, Kazuhiro Marumoto
Polymer solar cells are one of the promising energy sources due to the easy solution-processable production with large area at a low cost without toxicity. Among the polymer materials, a donor-acceptor conjugated copolymer PTB7 has been extensively studied because of the typical high-performance polymer solar cells. Here, we show operando direct observation of charge accumulation in PTB7:PC71BM blend solar cells from a microscopic viewpoint using electron spin resonance (ESR) spectroscopy. The accumulation of ambipolar charges in the PTB7-based cells is directly observed for the first time, which shows a clear correlation with the performance deterioration during device operation...
July 13, 2018: ACS Applied Materials & Interfaces
Jing Li, Jiantao Yu, Yishun Huang, Haoran Zhao, Leilei Tian
Oligonucleotide-stabilized silver nanoclusters (AgNCs) show promising applications in bio-imaging and bio/chemo-sensing. However, unsatisfactory photostability limits their practical applications. In this work, fluorescent AgNCs were synthesized in situ in a DNA hydrogel, consisting of cross-linked enzymatically amplified polymeric DNAs with cytosine-rich sequences in the presence of Ag+. The fluorescence property of the resultant AgNCs was optimized by a rational design of the DNA sequences to cover a broad spectrum with comparable green and red emissions...
July 12, 2018: ACS Applied Materials & Interfaces
Hongyu Quan, Yuwei He, Jujiang Sun, Weihu Yang, Wei Luo, Ce Dou, Fei Kang, Chunrong Zhao, Jian He, Xiaochao Yang, Shiwu Dong, Hong Jiang
Bone defects/fractures are common in older people suffering from osteoporosis. Traditional hydroxyapatite (HA) materials for osteoporotic bone repair face many challenges, including limited bone formation and aseptic loosening of orthopedic implants. In this study, a new multi-functional HA is synthesized by spontaneous assembly of alendronate (AL) and Fe3O4 onto HA nanocrystals for osteoporotic bone regeneration. The chemical coordination of AL and Fe3O4 with HA does not induce lattice deformation, resulting in a functionalized HA (Func-HA) with proper magnetic property and controlled release manner...
July 12, 2018: ACS Applied Materials & Interfaces
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