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Ultra-sensitive graphene strain sensor for sound signal acquisition and recognition

Nano Research 2015年第5期8卷 1627-1636页

作者： Yan Wang Tingting Yang Junchao Lao Rujing Zhang Yangyang Zhang Miao Zhu Xiao Li Xiaobei Zang Kunlin Wang Wenjian YU Hu Jin Li Wang Hongwei Zhu Department of Physics and Institute for Advanced Study Nanchang University Nanchang 330031 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory ot Materials Processing Technology of MOE Tsinghua University Beijing 100084 China Department of ComputerScience and Technology Tsinghua University Beijing 100084 China 2D Carbon Graphene Material Co. Ltd. Changzhou 213149 China

A wearable and high-precision sensor for sound signal acquisition and recognition was fabricated from thin films of specially designed graphene woven fabrics （GWFs）. Upon being stretched, a high density of random cracks appears in the network, which decreases the current pathways, thereby increasing the resistance. Therefore, the film could act as a strain sensor on the human throat in order to measure one＇s speech through muscle movement, regardless of whether or not a sound is produced. The ultra-high sensitivity allows for the realization of rapid and low-frequency speech sampling by extracting the signature characteristics of sound waves. In this study, representative signals of 26 English letters, typical Chinese characters and tones, and even phrases and sentences were tested, revealing obvious and characteristic changes in resistance. Furthermore, resistance changes of the graphene sensor responded perfectly with pre-recorded sounds. By combining artificial intelligence with digital signal processing, we expect that, in the future, this graphene sensor will be able to successfully negotiate complex acoustic systems and large quantities of audio data.

关键词： graphene strain sensors sound detectors high sensitivity

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2D ZnO mesoporous single-crystal nanosheets with exposed {0001} polar facets for the depollution of cationic dye molecules by highly selective adsorption and photocatalytic decomposition

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Applied Catalysis B: Environmental 2016年 181卷 138-145页

作者： Jing Liu Zhi-Yi Hu Yao Peng Hua-Wen Huang Yu Li Min Wu Xiao-Xing Ke Gustaaf Van Tendeloo Bao-Lian Su Laboratory of Living Materials at State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan China EMAT (Electron Microscopy for Materials Science) University of Antwerp 171 Groenenborgerlaan B-2020 Antwerp Belgium Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5000 Namur Belgium Department of Chemistry and Clare Hall University of Cambridge Lensfeild Road Cambridge CB2 1EW United Kingdom

Two dimensional (2D) ZnO nanosheets are ideal system for dimensionally confined transport phenomenon investigation owing to specific surface atomic configuration. Therefore, 2D ZnO porous nanosheets with single-crystal nature and {0001} polar facets, likely display some specific physicochemical properties. In this work, for the first time, 2D ZnO mesoporous single-crystal nanosheets (ZnO-MSN) with {0001} polar facets have been designed and prepared via an intriguing colloidal templating approach through controlling the infiltration speed for the suspension of EG-capped ZnO nanoparticles and polymer colloids. The EG-capped ZnO nanoparticles are very helpful for single-crystal nanosheet formation, while the polymer colloids play dual roles on the mesoporosity generation and {0001} polar facets formation within the mesopores. Such special 2D structure not only accelerates the hole-electron separation and the electron transportation owing to the single-crystal nature, but also enhances the selective adsorption of organic molecules owing to the porous structure and the exposed {0001} polar facets with more O-termination (000-1) surfaces: the 2D ZnO-MSN shows highly selective adsorption and significantly higher photodegradation for positively charged rhodamine B than those for negatively charged methyl orange and neutral phenol, comparing with ZnO nanoparticles (ZnO-NP) and ZnO commercial nanoparticles (ZnO-CNP) with high surface areas. This work may shed some light on better understanding the synthesis of 2D porous single-crystal nanosheet with exposed polar surfaces and photocatalytic mechanism of nanostructured semiconductors in a mixed organic molecules system.

关键词： 2D ZnO mesoporous single-crystal nanosheets Polar facets Photocatalytic activity and selectivity Organic molecules Colloidal templating approach

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Self-propelled Micro-/Nanomotors:Design Strategies,Motion Properties and Potential Applications

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功能材料信息 2016年第2期13卷 44-44页

作者： Jianguo Guan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of Technology

Micro-/nanomotors have fascinating capabilities to pick up,transport,and release various micro/nanocargoes because of the autonomous motion behaviors in liquid media,and can be used to perform complex tasks,including drug delivery,protein and cell separation,microsiirgeries and environmental remediation,*** presentation firstly shows a biocompatible

关键词：英语阅读理解纳米材料与技术

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Optimized design of regeneration material for the treatment of peripheral nerve injury

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中国神经再生研究（英文版） 2015年第11期10卷 1780-1781页

作者： Hong-lian Dai Shi-pu Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan Hubei Province China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan Hubei Province China

Peripheral nerve defects are a common disabling *** nerve injuries arise from trauma,cancer,or congenital defects,and are challenging clinical issues to *** to statistical data from the World Health Organization,there are 10-15 million new trauma cases reported worldwide every year,of which 15-40％ involve peripheral nerve *** China,600,000-900,000 new cases of peripheral nerve injury are reported annually,approximately half of which require nerve ***,long-segment peripheral nerve defects and injury to multiple nerves cannot be repaired in the clinic,and neuromas form readily during the process of *** aim of treatment for peripheral nerve defects is the recovery not only of structure,but also sensory and motor ***,nerve regeneration and functional recovery after peripheral nerve damage remain important topics in the field of *** this review,we highlight a recent development in nerve regeneration surgery.

关键词： peripheral nerve injury nerve regeneration statistical data motor function the World

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Tunable macro-mesoporous ZnO nanostructures for highly sensitive ethanol and acetone gas sensors

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RSC Advances 2015年第123期5卷 101910-101916页

作者： Huang, Hua-Wen Liu, Jing He, Guangfu Peng, Yao Wu, Min Zheng, Wei-Hong Chen, Li-Hua Li, Yu Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road WuhanHubei430070 China State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology 122 Luoshi Road WuhanHubei China University of Namur 61 rue de Bruxelles Namur5000 Belgium Department of Chemistry Clare Hall University of Cambridge CambridgeCB2 1EW United Kingdom

Tunable macro-mesoporous ZnO (M/m-ZnO) nanostructures with a wurtzite hexagonal structure have been successfully synthesized using polymer colloids as a hard template and 20-40 nm ZnO nanoparticles as a precursor via controlling the ratios of colloids and ZnO nanoparticles. The as-prepared macro-mesoporous ZnO nanostructures are investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Gas sensing performance is carried out for ethanol and acetone at different temperatures and concentrations. The gas sensing results show that the tunable M/m-ZnO nanostructures exhibit excellent gas sensing performances because the hierarchical macro-mesopores provide a large contacting surface area for electrons, oxygen and target gas molecules, offer smooth transport channels for target gas diffusion and finally enhance the gas molecular diffusion kinetics. The M/m-ZnO-600 nm demonstrates the best performance for ethanol and acetone detection. In addition, the sensor based on M/m-ZnO-600 nm gives obvious tendencious selectivity and a good repeatability and long-term stability to acetone at the optimum temperature of 300°C. This work suggests that the macro-mesoporous ZnO is a potential material for advanced gas sensing. © The Royal Society of Chemistry.

关键词： ZnO nanoparticles

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MoB/g‐C3N4Interface materials as a Schottky Catalyst to Boost Hydrogen Evolution

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Angewandte Chemie 2017年第2期130卷

作者： Zechao Zhuang Yong Li Zilan Li Fan Lv Zhiquan Lang Kangning Zhao Liang Zhou Lyudmila Moskaleva Shaojun Guo Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology Universität Bremen 28359 Bremen Germany Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Department of Chemistry University of California Berkeley CA 94720 USA

Proton adsorption on metallic catalysts is a prerequisite for efficient hydrogen evolution reaction (HER). However, tuning proton adsorption without perturbing metallicity remains a challenge. A Schottky catalyst based on metal–semiconductor junction principles is presented. With metallic MoB, the introduction of n‐type semiconductive g‐C 3 N 4 induces a vigorous charge transfer across the MoB/g‐C 3 N 4 Schottky junction, and increases the local electron density in MoB surface, confirmed by multiple spectroscopic techniques. This Schottky catalyst exhibits a superior HER activity with a low Tafel slope of 46 mV dec −1 and a high exchange current density of 17 μA cm −2 , which is far better than that of pristine MoB. First‐principle calculations reveal that the Schottky contact dramatically lowers the kinetic barriers of both proton adsorption and reduction coordinates, therefore benefiting surface hydrogen generation.

关键词： Elektrokatalyse Graphitische Kohlenstoffnitride Molybdänborid Schottky-Kontakt Wasserstoffentwicklung

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Preparation of Layered Potassium Titanate Whiskers with Large Length-diameter Ratio by KDC Method

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Journal of Wuhan University of technology(materials Science) 2014年第4期29卷 669-673页

作者：吉晓莉 WU Shijiang 章嵩 ZHAO Xiujian State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology

Pure K2Ti4O9 whiskers were prepared by KDC（Kneading-Drying-Calcination） method with TiO2 and K2CO3 as raw materials. The influences of TiO2/K2CO3 molar ratio（RT/K）, calcination temperature（TC） and cooling process on phase composition and morphology of the whiskers were investigated by TG-DSC（thermo gravimetric-differential scanning calorimeter）, XRD（X-ray diffraction）, and SEM（scanning electron microscope）. Pure K2Ti4O9 potassium titanate whiskers with large length-diameter ratio（r）（over 250） can be obtained at RT/K = 2.9 and TC = 950 ℃.

关键词： KDC（kneading-drying-calcination） method potassium titanate whiskers TiO2/K2CO3 molar ratio（RT/K） length-diameter ratio（r）

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Energy storage properties of BNT-BT based solid solution

Energy storage properties of BNT-BT based solid solution

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IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Qi Xu Hanxing Liu Lin Zhang Minghe Cao Juan Xie Hua Hao Zhonghua Yao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China

ISBN: (纸本)9781479999750

The phase structure, microstructure, dielectric and energy storage properties of 0.85(0.92Bi 0.5 Na 0.5 TiO 3 -0.08BaTiO 3 )-0.15(Na 1-3x Bi x NbO 3 ) (BNTBT-NB x N) polycrystalline lead-free ceramics were systematically investigated. Dense and pore-free samples were prepared by conventional solid state reaction method. X-ray diffraction results indicated that the solid solubility of Bi in BNTBT-NB x N system lay at x=0.05~0.07. Within the solid solubility, the first dielectric anomaly which located at temperature T s was depressed and shifted towards lower temperature with x increasing. As a consequence, the temperature stability of dielectric properties was largely improved, which demonstrated that BNTBT-NB x N ceramics were promising for high-temperature capacitor dielectrics. The ferroelectric properties analysis indicated that with the increase of x, the maximum polarization P m gradually reduced and the P-E loops became slant and slim. The optimum energy storage properties was obtained for x=0.05 with energy storage density W=1.29J/cm 3 and energy storage efficiency η=76%.

关键词： Energy storage Ceramics Dielectrics Temperature Lead Solids Bismuth

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Chiral polymer-based biointerface materials

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Science China Chemistry 2014年第4期57卷 540-551页

作者： LI MinMin QING GuangYan ZHANG MingXi SUN TaoLei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Chirality is a unique phenomenon in nature. Chiral interactions play an important role in biological and physiological process- es, which provides much inspiration for scientists to develop cbiral materials. As a breakthrough from traditional materials, bi- ointerface materials based on chiral polymers have attracted increasing interest over the past few years. Such materials ele- gantly combine the advantages of chiral surfaces and traditional polymers, and provide a novel solution not only for the inves- tigation of chiral interaction mechanisms but also for the design of biomaterials with diverse applications, such as in tissue en- gineering and biocompatible materials, bioregulation, chiral separation and chiral sensors. Herein, we summarize recent ad- vances in the study of chiral effects and applications of chiral polymer-based biointerface materials, and also present some challenges and perspectives.

关键词： chirality polymer chiral interaction biointerface materials chiral effects applications

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Cover Feature: Ring-Opening Polymerization ofl-Lactide to Cyclic Poly(Lactide) by Zeolitic Imidazole Framework ZIF-8 Catalyst (ChemSusChem 21/2017)

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ChemSusChem 2017年第21期10卷 4120-4120页

作者： Zhixiong Luo Dr. Somboon Chaemchuen Kui Zhou Prof. Dr. Francis Verpoort Laboratory of Organometallics Catalysis and Ordered Materials State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Chemical and Material Engineering Wuhan University of Technology Wuhan P. R. China School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan 430070 P .R. China Department of Inorganic and Physical Chemistry Ghent University Krijgslaan 281-S3 9000 Ghent Belgium School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 P. R. China National Research Tomsk Polytechnic University Lenin Avenue 30 Tomsk 634050 Russian Federation

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