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resistance reduction of patterned surface inspired by cuticle structure of Achalinus spinalis

Friction 2023年第7期11卷 1359-1370页

作者： Jiahui ZHAO Keju JI Qin CHEN Muhammad Niaz KHAN Chongwen TU Ze MA Jianming WU Jian CHEN Zhendong DAI Jiangsu Provincial Key Laboratory of Bionic Functional Materials College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041China

The crawling process of snakes is known to have fascinating tribological phenomena,whereas investigations on their frictional properties depending on patterned cuticles are *** this study,we have designed and fabricated biomimetic microstructures inspired by the geometric microunits of Achalinus spinalis cuticle using polyurethane acrylate(PUA)material and performed its tribological *** micro-morphology of this Achalinus-inspired textured polymer surface(AITPS)is characterized by the closely and evenly quasi-rectangular microgrooves,periodically arranged along certain *** have compared the frictional performance of our fabricated AITPS with other competitive microstructure,using a smooth steel ball and commercial clay as an interacting *** performing massive friction tests with steel ball and clay,AITPS still maintains good resistance reduction performed compared to the patterned surface with straight microgrooves,which is most likely due to the reduction of actual contact areas at the frictional interface.

关键词： biomimetic microstructure friction resistance reduction

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Lateral resistance reduction induced by light-controlled leak current in silicon-based Schottky junction

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Chinese Physics B 2015年第10期24卷 448-452页

作者：王拴虎张勖邹吕宽赵靓王文鑫孙继荣 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Lateral resistance of silicon-based p-type and n-type Schottky junctions is investigated. After one electrode on a metallic film is irradiated, the differential lateral resistance of the system is dependent on the direction of the bias current：it keeps constant in one direction and decreases in the opposite direction. By systematically investigating the electrical potential changes in silicon and the junction, we propose a new mechanism based on light-controlled leak current. Our work provides an insight into the nature of this phenomenon and will facilitate the advanced design of switchable devices.

关键词： resistance reduction Schottky junction photovoltaic effect

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Histological changes following surgically-assisted rapid tooth movement through resistance reduction and distraction osteogenesis in dogs

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Journal of Pharmaceutical Analysis 2010年第2期22卷 139-142页

作者： Xi Chen1,Jian-Lin Liu2,Juan Dai3,Shuang Wang4,Ya-Li Huang11. Department of Stomatology,the First Affiliated Hospital,Medical School of Xi’an Jiaotong University,Xi’an 710061 2. Department of Stomatology,No.2 Traditional Chinese Medical Hospital,Shenzhen 518034 3. Department of Orthodontics,School of Stomatology,Fourth Military Medical University,Xi’an 710032 4. Department of Orthodontics,Stomatological Hospital of Xi’an Jiaotong University,Xi’an 710004,China. Department of Stomatology First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China Department of Stomatology No. 2 Traditional Chinese Medical Hospital Shenzhen 518034 China Department of Orthodontics School of Stomatology Fourth Military Medical University Xi'an 710032 China Department of Orthodontics Stomatological Hospital of Xi'an Jiaotong University Xi'an 710004 China

Objective To investigate the histological changes of rapid tooth movement in dogs treated by resistance reduction and distraction osteogenesis,aiming to establish an animal model and further to reveal the remodeling mechanism of rapid tooth movement. Methods A total of 8 local hybrid dogs were selected as subjects for this study. The second pre-molar was extracted on both sides. The experimental side underwent alvelor surgery for resistance reduction and a home-made tooth-borne intraoral distraction device was installed for rapid tooth movement,while for the other side (control side) only tooth-borne intraoral distraction device was used for rapid tooth movement. The longest active force-delivery span was 2 weeks,followed by 6-week retention. The distance between the moved tooth and anchor unit was recorded weekly,and radiography was performed for each side before and after distraction. The surrounding tissues including periodontal ligament and alveolar bone were sectioned for histological analysis. Results The average distance of tooth movement was 3.55mm on the experimental side and 1.11mm on the control side. The rate of tooth movement was notably higher (Presistance reduction and periodontal distraction without any unfavorable effects but at minimal anchorage loss.

关键词： periodontal ligament distraction osteogenesis resistance reduction rapid tooth movement

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