DOCSLIB.ORG

Intrinsically Stretchable Organic-Tribotronic-Transistor for Tactile Sensing

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Intrinsically Stretchable Organic-Tribotronic-Transistor for Tactile Sensing AAAS Research Volume 2020, Article ID 1398903, 10 pages https://doi.org/10.34133/2020/1398903 Research Article Intrinsically Stretchable Organic-Tribotronic-Transistor for Tactile Sensing Junqing Zhao ,1,2 Tianzhao Bu ,1,2 Xiaohan Zhang,1,2 Yaokun Pang,1,2 Wenjian Li,1,2 Zhi Zhang,1,2 Guoxu Liu,1,2 Zhong Lin Wang,1,2,3 and Chi Zhang 1,2,4 1CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China 2School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China 3School of Material Science and Engineering Georgia Institute of Technology, Atlanta, GA 30332, USA 4Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China Correspondence should be addressed to Chi Zhang; [email protected] Received 8 April 2020; Accepted 25 May 2020; Published 24 June 2020 Copyright © 2020 Junqing Zhao et al. Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0). Stretchable electronics are of great significance for the development of the next-generation smart interactive systems. Here, we propose an intrinsically stretchable organic tribotronic transistor (SOTT) without a top gate electrode, which is composed of a stretchable substrate, silver nanowire electrodes, semiconductor blends, and a nonpolar elastomer dielectric. The drain-source current of the SOTT can be modulated by external contact electrification with the dielectric layer. Under 0-50% stretching both parallel and perpendicular to the channel directions, the SOTT retains great output performance. After being stretched to 50% for thousands of cycles, the SOTT can survive with excellent stability. Moreover, the SOTT can be conformably attached to the human hand, which can be used for tactile signal perception in human-machine interaction and for controlling smart home devices and robots. This work has realized a stretchable tribotronic transistor as the tactile sensor for smart interaction, which has extended the application of tribotronics in the human-machine interface, wearable electronics, and robotics. 1. Introduction which can effectively convert mechanical energy into electric- ity [20–22]. In recent years, tribotronics as a new field has Stretchable electronics are grabbing more and more attention been proposed by using the triboelectric potential generated for a wide range of applications in wearable devices, soft by TENG to control the carrier transport in semiconductors, mechanics, robotic skin, human-machine interfaces, and so which has established the direct interaction mechanism on [1–6]. To date, a series of stretchable functional devices between human/environment and electronics [23–29]. have been developed with prominent tactile-sensing proper- Moreover, a variety of tribotronic functional devices have ties based on various physical transduction mechanisms such been demonstrated for tactile perception and control, includ- as piezoresistivity [7, 8], capacitance [9], magnetism [10, 11], ing smart tactile switch [30], tactile-sensing arrays [31], and optics [12]. However, most of the tactile-sensing mecha- active modulation of conventional electronics [32], and nisms for stretchable electronics are passive, lacking direct mechanosensation-active matrix [33]. In addition, tribotro- interaction with human/environment [13–17]. This compli- nic devices have demonstrated the diversity of material selec- cates the process of information acquisition and further tion [24–36], which is very promising for the intrinsically influences the tactile perception ability of stretchable func- stretchable electronics for active tactile sensing by further tional devices. Therefore, developing stretchable electronics coupling with stretchable materials. with an active sensing mechanism is highly desired. Here, we propose an intrinsically stretchable organic tri- Since 2012, the triboelectric nanogenerator (TENG) as a botronic transistor (SOTT) without a top gate electrode, new energy technology derived from the Maxwell displace- which is composed of a stretchable substrate, silver nanowire ment current has been invented by Wang et al. [18, 19], (Ag NW) electrodes, semiconductor blends, and a nonpolar 2 Research elastomer dielectric. The drain-source current of the SOTT PDMS, the P3HT NF solution was subsequently spin-coated can be modulated by external contact electrification with onto the drain-source electrodes through a polyimide the dielectric layer. Under 0-50% stretching both parallel shadow mask to achieve a patterned semiconductor layer and perpendicular to the channel directions, the SOTT (iv). Contained in the transparent PDMS, the semiconductor exhibits good output performances. After being stretched to layer has revealed great optical transparency, which is 50% for thousands of cycles, the SOTT can survive with important for the application in wearable and bionic excellent stability. Moreover, the SOTT can be conformably electronics (Figure S2). The stretchable dielectric layer, attached to the human hand, which can be used for tactile which is composed of PDMS, was spin-coated onto a signal perception in human-machine interaction and for polytetrafluoroethylene (PTFE) block and then transferred controlling smart home devices and robots. This work has onto the P3HT NF/PDMS semiconductor layer to form the realized a stretchable tribotronic transistor as the tactile sen- final SOTT (v and vii). The complete structure of the SOTT sor for smart interaction, which has extended the application shown in Figure 1(b) was obtained by peeling off the whole of tribotronics in human-machine interface, wearable elec- device from the PTFE block (viii), which has demonstrated a tronics, and robotics. simple structure without a top gate electrode. The channel length is about 500 μm, as shown in Figure 1(c). Since all 2. Results and Discussion components of the device are stretchable, the prepared SOTT can be stretched both parallel and perpendicular to the 2.1. Fabrication of the Stretchable Tribotronic Transistor. channel directions. Figure 1(d) shows the optical graphs of a Poly(3-hexylthiophene-2,5-diyl) (P3HT), as a polymer semi- stretched device in two directions. As clearly seen from the conductor, has a high hole mobility and a low band gap width graphs, the device can be deformed without physical damage [37]. The P3HT nanofibril (P3HT-NF) combined with the upon stretching. Moreover, optical microscopy and atomic stretchable elastomer materials has high stretchability, which force microscopy (AFM) images of the P3HT NF/PDMS is good for developing stretchable semiconductor devices [38, blends have demonstrated that the semiconductor blends can 39]. Among a lot of elastomers, the polydimethylsiloxane be stretched without any obvious cracks under 50% strain, as (PDMS) with a simple preparation process can sustain large shown in Figures 1(e) and 1(f), which is very helpful for strains. Moreover, the PDMS has a good triboelectric prop- promoting the stretchability of the SOTT. erty, which is good for tribotronic devices [40–42]. Ag NWs have good conductivity, which have been widely used 2.2. Mechanism and Performances of the Stretchable in the field of stretchable electrodes [43, 44]. Therefore, in Tribotronic Transistor. The working mechanism of the SOTT order to obtain highly stretchable SOTT, we exploit the is presented in Figure 2(a). The drain and source electrodes P3HT nanofibril-percolated PDMS rubber composite as a of the SOTT are connected with a voltage source. An alumi- stretchable semiconductor, the Ag NWs dispersed within num (Al) film, as an external triboelectric layer, fully contacts the PDMS as a stretchable conductor, and the PDMS as a gate with the dielectric layer in the initial state for electrification as dielectric. Through the contact electrification between the shown in Figure 2(a), i. The Al film is electrified with positive external triboelectric layer and the PDMS gate dielectric layer, charges while the PDMS dielectric layer with negative the drain-source current of the transistor can be modulated. charges for the difference in charge affinities. Owing to the The schematic illustration of the fabrication process for electrostatic balance, electrical potential difference is not the SOTT is shown in Figure 1(a). The detailed process is applied to the channel region, and no obvious changes take elaborated in Materials and Methods. The SOTT consists of place in the drain current. When the Al film gradually sepa- a stretchable substrate, Ag NW electrodes, semiconductor rates from the PDMS dielectric layer by an external force as blends, and a nonpolar elastomer dielectric, which is fabri- shown in Figure 2(a), ii, negative charges on the dielectric cated throughout a sequential lamination transfer process. layer surface will induce an inner charge polarization, which To prepare the stretchable drain and source electrodes, Ag will build an inner electric field across the channel and the NWs were spray coated onto an octadecyltrimethoxysilane- dielectric surface, leading the holes to accumulate at the (OTS-) pretreated silica wafer through a shadow mask (i), interface of the channel and the dielectric layer. As a result, then followed by embedding into a nonpolar elastomeric an enhancement zone is achieved in the p-type P3HT PDMS substrate (ii). To build an ohmic contact between
Load more

Recommended publications
  • Rationalizing the Triboelectric Series of Polymers
    Communication Cite This: Chem. Mater. 2019, 31, 1473−1478 pubs.acs.org/cm Rationalizing the Triboelectric Series of Polymers Xuan Zhang, Linfeng Chen, Yan Jiang, Weichun Lim, and Siowling Soh* Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore *S Supporting Information ontact electrification is the phenomenon in which static electronic components (e.g., “tribotronics”),13,14 filtration,15,16 C charge is generated when two materials come into and sensors.17,18 Therefore, there is a great need to select the contact and are then separated. After contact, one material appropriate types of materials for useful applications related to charges positively and the other charges negatively (Figure 1). contact electrification or for the fabrication of noncharging This phenomenon is ubiquitous: almost all types of materials surfaces for circumstances in which contact electrification is 1,3,19,20 (e.g., metal, semiconductor, inorganic materials, and polymers) undesirable. charge upon contact. Hence, contact electrification has a vast The triboelectric series is widely used by researchers and range of influences in our lives.1 In many of our daily activities, engineers for the selection of materials for applications related fi we frequently encounter slight annoyances as a result of static to contact electri cation. It ranks a list of materials according charge (e.g., the adherence of dust particles on charged to their tendency to charge positively or negatively (Figure 1). surfaces and the sticking of clothes after drying). The A material that is ranked more positively than a contacting phenomenon is also problematic for many types of industries material charges positively while the contacting material (e.g., petrochemical, chemical, pharmaceutical, semiconductor, charges negatively, and vice versa.
    [Show full text]
  • Rheological Texture in a Journal Bearing with Magnetorheological Fluids
    Delft University of Technology Rheological texture in a journal bearing with magnetorheological fluids Lampaert, Stefan G.E.; Quinci, Federico; van Ostayen, Ron A.J. DOI 10.1016/j.jmmm.2019.166218 Publication date 2020 Document Version Final published version Published in Journal of Magnetism and Magnetic Materials Citation (APA) Lampaert, S. G. E., Quinci, F., & van Ostayen, R. A. J. (2020). Rheological texture in a journal bearing with magnetorheological fluids. Journal of Magnetism and Magnetic Materials, 499, [166218]. https://doi.org/10.1016/j.jmmm.2019.166218 Important note To cite this publication, please use the final published version (if applicable). Please check the document version above. Copyright Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons. Takedown policy Please contact us and provide details if you believe this document breaches copyrights. We will remove access to the work immediately and investigate your claim. This work is downloaded from Delft University of Technology. For technical reasons the number of authors shown on this cover page is limited to a maximum of 10. Journal of Magnetism and Magnetic Materials 499 (2020) 166218 Contents lists available at ScienceDirect Journal of Magnetism and Magnetic Materials journal homepage: www.elsevier.com/locate/jmmm Research articles Rheological texture in a journal
    [Show full text]
  • Rationalizing the Triboelectric Series of Polymers
    Communication Cite This: Chem. Mater. 2019, 31, 1473−1478 pubs.acs.org/cm Rationalizing the Triboelectric Series of Polymers Xuan Zhang, Linfeng Chen, Yan Jiang, Weichun Lim, and Siowling Soh* Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore *S Supporting Information ontact electrification is the phenomenon in which static electronic components (e.g., “tribotronics”),13,14 filtration,15,16 C charge is generated when two materials come into and sensors.17,18 Therefore, there is a great need to select the contact and are then separated. After contact, one material appropriate types of materials for useful applications related to charges positively and the other charges negatively (Figure 1). contact electrification or for the fabrication of noncharging This phenomenon is ubiquitous: almost all types of materials surfaces for circumstances in which contact electrification is 1,3,19,20 (e.g., metal, semiconductor, inorganic materials, and polymers) undesirable. charge upon contact. Hence, contact electrification has a vast The triboelectric series is widely used by researchers and range of influences in our lives.1 In many of our daily activities, engineers for the selection of materials for applications related fi we frequently encounter slight annoyances as a result of static to contact electri cation. It ranks a list of materials according charge (e.g., the adherence of dust particles on charged to their tendency to charge positively or negatively (Figure 1). surfaces and the sticking of clothes after drying). The A material that is ranked more positively than a contacting phenomenon is also problematic for many types of industries material charges positively while the contacting material (e.g., petrochemical, chemical, pharmaceutical, semiconductor, charges negatively, and vice versa.
    [Show full text]
  • Software Framework for Tribotronic Systems
    SOFTWARE FRAMEWORK FOR TRIBOTRONIC SYSTEMS APREPRINT Jarno Kansanaho∗ Tommi Kärkkäinen Faculty of Information Technology Faculty of Information Technology University of Jyväskylä, FI-40014, Finland University of Jyväskylä, FI-40014, Finland [email protected] [email protected] October 31, 2019 ABSTRACT Increasing the capabilities of sensors and computer algorithms produces a need for structural support that would solve recurring problems. Autonomous tribotronic systems self-regulate based on feedback acquired from interacting surfaces in relative motion. This paper describes a software framework for tribotronic systems. An example of such an application is a rolling element bearing (REB) installation with a vibration sensor. The presented plug-in framework offers functionalities for vibration data management, feature extraction, fault detection, and remaining useful life (RUL) estimation. The framework was tested using bearing vibration data acquired from NASA’s prognostics data repository, and the evaluation included a run-through from feature extraction to fault detection to remaining useful life estimation. The plug-in implementations are easy to update and new implementations are easily deployable, even in run-time. The proposed software framework improves the performance, efficiency, and reliability of a tribotronic system. In addition, the framework facilitates the evaluation of the configuration complexity of the plug-in implementation. Keywords Software framework · Tribotronic system · Bearing diagnostics · Bearing prognostics · Vibration analysis 1 Introduction The term ’tribology’ was introduced and defined in The Jost Report [1] as "the science and technology of interacting surfaces in relative motion and of the practices related hereto." It was reported that enormous amounts of resources were wasted because mechanical surface phenomena was ignored [2].
    [Show full text]
  • Triboelectric Nanogenerators: Biomechanical Energy Harvesting, Self Powered Sensor and Wearable Applications
    TRIBOELECTRIC NANOGENERATORS: BIOMECHANICAL ENERGY HARVESTING, SELF POWERED SENSOR AND WEARABLE APPLICATIONS A THESIS SUBMITTED TO THE GRADUATE SCHOOL OF ENGINEERING AND SCIENCE OF BILKENT UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN MATERIALS SCIENCE AND NANOTECHNOLOGY By Ahmet Faruk Yavuz September, 2017 TRIBOELECTRIC NANOGENERATORS: BIOMECHANICAL ENERGY HARVESTING, SELF POWERED SENSOR AND WEARABLE APPLICATIONS By Ahmet Faruk Yavuz September, 2017 We certify that we have read this thesis and that in our opinion it is fully adequate, in scope and in quality, as a dissertation for the degree of Master of Science. Hasan Tarık Baytekin (Advisor) Mehmet Bayındır (Co-Advisor) Şemsettin Türköz Talip Serkan Kasırga Approved for the Graduate School of Engineering and Science: Ezhan Karaşan Director of the Graduate School ii ABSTRACT TRIBOELECTRIC NANOGENERATORS: BIOMECHANICAL ENERGY HARVESTING, SELF POWERED SENSOR AND WEARABLE APPLICATIONS Ahmet Faruk Yavuz M.S. in Materials Science and Nanotechnology Supervisor: Hasan Tarık Baytekin September, 2017 One of the biggest challenges ahead massive advancement of electronic tech- nology is increasing energy consumption. A closer consideration on draining of fossil reserves and rapid development of wearable and portable consumer elec- tronics, inevitable paradigm shift is required towards use of renewable energy sources and self-powered electronic systems respectively. In parallel to this con- sideration, triboelectric nanogenerators have emerged to scavenge
    [Show full text]
  • Monitoring of Wear in Elasto- Hydrodynamic Lubricated Contacts –Running-In and Failure Propagation –
    ISSN: 1402-1757 ISBN 978-91-7439-XXX-X Se i listan och fyll i siffror där kryssen är LICENTIATE T H E SIS Department of Mathematics, Applied Physics and Mechanical Engineering Stephan Schnabel Monitoring of Wear in Elasto- Hydrodynamic Lubricated in Elasto- Hydrodynamic Contacts Wear Stephan Schnabel Monitoring of Division of Machine Elements Monitoring of Wear in Elasto- ISSN 1402-1757 Hydrodynamic Lubricated Contacts ISBN 978-91-7439-854-0 (print) ISBN 978-91-7439-855-7 (pdf) Running-in and Failure Propagation Luleå University of Technology 2014 Running-in and Failure Propagation Running-in and Failure Stephan Schnabel MONITORING OF WEAR IN ELASTO- HYDRODYNAMIC LUBRICATED CONTACTS –RUNNING-IN AND FAILURE PROPAGATION – STEPHAN SCHNABEL Luleå University of Technology Department of Mathematics, Applied Physics and Mechanical Engineering, Division of Machine Elements Cover figure: disassembled Angular contact ball bearing Title page figure: Surface topography of rolling element bearings contaminated with iron oxide MONITORING OF WEAR IN ELASTO- HYDRODYNAMIC LUBRICATED CONTACTS –RUNNING-IN AND FAILURE PROPAGATION – Copyright c Stephan Schnabel (2014). This document is available at http://www.ltu.se The document may be freely distributed in its original form including the cur- rent author’s name. None of the content may be changed or excluded without permissions from the author. Printed by Luleå University of Technology, Graphic Production 2014 ISSN:ISSN 1402-1757 1402-1757 ISBN 978-91-7439-854-0 (print) ISBN 978-91-7439-855-7 (pdf) Luleå 2014 www.ltu.se This document was typeset in LATEX2ε Preface The work presented in this licentiate thesis was carried out at Luleå Univer- sity of Technology at the Division of Machine Elements and is part of the project TriboAct.
    [Show full text]
  • Self-Powered Electrochemical System by Combining Fenton Reaction and Active Chlorine Generation for Organic Contaminant Treatment
    ISSN 1998-0124 CN 11-5974/O4 2019, 12(1): 000–000 https://doi.org/10.1007/s12274-019-2506-5 Research Article Research Self-powered electrochemical system by combining Fenton reaction and active chlorine generation for organic contaminant treatment Yawei Feng1,2,§, Kai Han1,2,§, Tao Jiang1,2,§, Zhenfeng Bian3, Xi Liang1,2, Xia Cao1,2 (), Hexing Li4 (), and Zhong Lin Wang1,2,5 () 1 CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China 2 School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China 3 Education Ministry Key and International Joint Lab of Resource Chemistry and Shanghai Key Lab of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China 4 School of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China 5 School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA § Yawei Feng, Kai Han, and Tao Jiang contributed equally to this work. © Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Received: 7 July 2019 / Revised: 18 August 2019 / Accepted: 22 August 2019 ABSTRACT Environmental deterioration, especially water pollution, is widely dispersed and could affect the quality of people’s life at large. Though the sewage treatment plants are constructed to meet the demands of cities, distributed treatment units are still in request for the supplementary of centralized purification beyond the range of plants. Electrochemical degradation can reduce organic pollution to some degree, but it has to be powered.
    [Show full text]
  • COMADEM2011 Paper Template
    Tribotronics Facilitates e-maintenance Implementation Sergei GLAVATSKIH1,2, Uday KUMAR3 1. Division of Machine Elements, Luleå University of Technology, Luleå, Sweden 2. Department of Mechanical construction and production, Ghent University, Ghent, Belgium 3. Division of Operation & Maintenance Engineering, Luleå University of Technology, Luleå, Sweden ABSTRACT Our modern society depends to a great extent on the functionality and efficiency of all the mechanical machinery that we see around us and use every day. All these machines involve numerous tribological contacts. A contact between two surfaces that are in motion relative to each other will result in friction and wear. A constant trend towards more compact mechanical systems with higher power densities requires them to operate in increasingly severe conditions, which heavily influence tribological contacts. They, in turn, affect machine efficiency and impose a limit on machine reliability and service life. Present tribological systems are passive, i.e. their performance cannot be tuned on-line. The purpose of tribotronics is to control so-called loss outputs in a tribo-mechanical system: friction, wear, vibration, etc. Such a system includes sensors, a control unit and actuators. A tribotronic system is thus autonomous and self-adjusting. This allows for on-line tuning of the tribological components for the best performance. This paper illustrates how tribotronic systems can facilitate e-maintenance and thus provide foundation for the best maintenance decisions. Keywords: active tribology, e-maintenance, condition monitoring 1. INTRODUCTION For too long maintenance has been considered as a minor element of strategic thinking by senior managers and yet for many companies the cost of maintenance will be around 40-60 % of the total production costs when direct and indirect costs of maintenance are taken into account.
    [Show full text]
  • Development Trends and Perspectives of Future Sensors and MEMS/NEMS
    micromachines Review Development Trends and Perspectives of Future Sensors and MEMS/NEMS 1,2,3,4, 1,2,3, 1,2,3,4 1,2,3,4 Jianxiong Zhu y, Xinmiao Liu y, Qiongfeng Shi , Tianyiyi He , Zhongda Sun 1,2,3, Xinge Guo 1,2,3, Weixin Liu 1,2,3, Othman Bin Sulaiman 1,2,3, Bowei Dong 1,2,3,4,5 and Chengkuo Lee 1,2,3,4,5,* 1 Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore; [email protected] (J.Z.); [email protected] (X.L.); [email protected] (Q.S.); [email protected] (T.H.); [email protected] (Z.S.); [email protected] (X.G.); [email protected] (W.L.); [email protected] (O.B.S.); [email protected] (B.D.) 2 Center for Intelligent Sensors and MEMS (CISM), National University of Singapore, Singapore 117608, Singapore 3 Hybrid-Integrated Flexible (Stretchable) Electronic Systems Program, National University of Singapore, Singapore 117608, Singapore 4 NUS Suzhou Research Institute (NUSRI), Suzhou Industrial Park, Suzhou 215123, China 5 NUS Graduate School for Integrative Science and Engineering (NGS), National University of Singapore, Singapore 119077, Singapore * Correspondence: [email protected]; Tel.:+65-6516-5865 These authors contributed equally. y Received: 3 November 2019; Accepted: 12 December 2019; Published: 18 December 2019 Abstract: With the fast development of the fifth-generation cellular network technology (5G), the future sensors and microelectromechanical systems (MEMS)/nanoelectromechanical systems (NEMS) are presenting a more and more critical role to provide information in our daily life.
    [Show full text]
  • Print Special Issue Flyer
    IMPACT CITESCORE FACTOR 3.0 2.881 SCOPUS an Open Access Journal by MDPI Intelligent Tribological and Functional Coatings Guest Editors: Message from the Guest Editors Prof. Shih-Chen Shi Department of Mechanical The Special Issue "Intelligent Tribological and Functional Engineering, National Cheng Kung University (NCKU), Tainan, Coatings" will provide a platform for researchers, Taiwan practitioners, and academics to present and discuss ideas, [email protected] challenges, and potential solutions on established or emerging topics related to research and practice in the Prof. Yunn-Lin Hwang field of engineering tribology toward achieving high speed, Department of Mechanical high precision, energy conservation, sustainable use, and Design Engineering, National Formosa University, Huwei, advanced design in industrial tribology, in addition to Taiwan issues related to application. [email protected] Prof. Jason Hsiao Chun Yang 1. Basic friction and wear; 2. Lubricants and lubrication; Department of Fiber and 3. Contact mechanics and adhesion; Composite Materials, Feng Chia 4. Surface engineering and coating; University, Taichung, Taiwan 5. Material analysis and examination; [email protected] 6. Tribology in machine elements; 7. Tribochemistry and tribocorrosion; 8. Biotribology; 9. Green tribology and sustainability; Deadline for manuscript 10. Micro- and nanotribology; 11. Manufacturing submissions: technology; 31 January 2022 12. Tribotronics and active tribology; 13. Dynamic and vibration engineering; 14. Computer-aided engineering; 15. Measurement and signal processing technology; 16. Power engineering technology; 17. Fire science and technology; 18. System design engineering; 19. Other engineering technologies mdpi.com/si/50503 SpeciaIslsue IMPACT CITESCORE FACTOR 3.0 2.881 SCOPUS an Open Access Journal by MDPI Editors-in-Chief Message from the Editorial Board Dr.
    [Show full text]
  • Schaeffler Symposium
    330 331 Friction Tailored to Your Requirements You wish, we deliver N O D H I O E A S M I O U E N L O A N G A D F J G I O J E R U I N K O P J E W L S P N Z A D F T O I E O H O I O O A N G A D F J G I O J E R U I N K O P O A N G A D F J G I O J E R O I E U G I A F E D O N E I U A M U H I O G D N O I E R N G M D S A U K Z Q I N K J S L O G D W O I A D U I G I R Z H I O G D N O I E R N G M D S A U K N M H I O G D N O I E R N G U N O D H I O E A S M I O B R N L N F X T J G L D Q F H B V T G U P W Q V Z C Y Q D M F E F B S A T B G P D R D D L R A E F B A F V N K F N K R E W S P D L R N E F B A F V N K F N U O I E U G I A F E D O T F I U D L D B E U B A F V N K F N K R E W S P L O C Y Q D M F E F B S A T B G P D B D D L R B E Z B A F V R K F N K R E W S P Z L R B E O B A F V N K F N A U D M P B D B H M G R R O G I K C K P M N E S W L N C X W Z Y K F E D I O P P M N E S W L N C X WTimZ Y HosenfeldtK A U A H I O G D N P I E R N G M D S A U K Z Q H I O G D N W I E R N G M D A U D M P B S B H M G R I J D P H I O G D N O I P R N G M D S A U K Z Q I N K J S L W O Q T V I E P EdgarN Z R SchulzA U A H I R G D N O I Q R N G M D S A U K Z Q H I O G D N O I Y R N G M D E A A T R U U N D O N G O U A R P M N E S W L N C A W Z Y K F E Q L O P N G S A Y B G D S W L Z U K JuergenO G I KGierlC K P M N E S W L N C U W Z Y K F E Q L O P P M N E S W L N C T W Z Y K M A M O E F R I C T I O N F P A R T N E R S R V L G R A K G E C L Z E M S A C I T P M O S G R U C Z StefanG Z M SteinmetzO Q O D N V U S G R V L G R M K G E C L Z E M D N V U S G R V L G R X K G T E
    [Show full text]
  • Development of Fully Flexible Tactile Pressure Sensor with Bilayer Interlaced Bumps for Robotic Grasping Applications
    micromachines Article Development of Fully Flexible Tactile Pressure Sensor with Bilayer Interlaced Bumps for Robotic Grasping Applications Lingfeng Zhu 1,2, Yancheng Wang 1,2,* , Deqing Mei 1,2 and Chengpeng Jiang 3 1 State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; [email protected] (L.Z.); [email protected] (D.M.) 2 Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China 3 Research Center for Smart Sensing, Zhejiang Lab, Hangzhou 310000, China; [email protected] * Correspondence: [email protected] Received: 14 July 2020; Accepted: 11 August 2020; Published: 12 August 2020 Abstract: Flexible tactile sensors have been utilized in intelligent robotics for human-machine interaction and healthcare monitoring. The relatively low flexibility, unbalanced sensitivity and sensing range of the tactile sensors are hindering the accurate tactile information perception during robotic hand grasping of different objects. This paper developed a fully flexible tactile pressure sensor, using the flexible graphene and silver composites as the sensing element and stretchable electrodes, respectively. As for the structural design of the tactile sensor, the proposed bilayer interlaced bumps can be used to convert external pressure into the stretching of graphene composites. The fabricated tactile sensor exhibits a high sensing performance, including relatively high sensitivity 1 (up to 3.40% kPa− ), wide sensing range (200 kPa), good dynamic response, and considerable repeatability. Then, the tactile sensor has been integrated with the robotic hand finger, and the grasping results have indicated the capability of using the tactile sensor to detect the distributed pressure during grasping applications.
    [Show full text]