Flexible low-voltage paper transistors harnessing ion gel/cellulose fiber composites
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EARLY CAREER SCHOLARS IN MATERIALS SCIENCE
Flexible low-voltage paper transistors harnessing ion gel/cellulose fiber composites Xu Wang1, Cunjiang Yu2,a) 1
Materials Science and Engineering Program, University of Houston, Houston, Texas 77204, USA Department of Mechanical Engineering, Materials Science and Engineering Program, Department of Biomedical Engineering, Department of Electrical and Computer Engineering, Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA a) Address all correspondence to this author. e-mail: [email protected] 2
Received: 2 June 2019; accepted: 16 September 2019
Paper transistors are indispensable devices for paper-based electronic biosensing systems. Existing paper transistors mainly use paper as a mechanical support in a passive fashion. By taking advantage of the cellulose fibers in paper, here we report a transistor-in-paper where paper is employed as an essential part to allow for low-voltage operation, which addresses the long-standing challenge of high-voltage operation with existing paper transistors. Such a low-threshold voltage is because of the ion gel/cellulose fiber composite dielectric formed by modifying the paper with ion gels. We further developed paper-based inverters as examples of logic gates and an integrated tactile sensing mat based on a transistor array–enabled multiplexing device. The results collectively indicate that the ion gel–modified paper leads to a class of flexible, low-voltage transistors and integrated electronic devices, which hold promise in many applications.
Cunjiang Yu
Dr. Cunjiang Yu is currently the Bill D. Cook Associate Professor of Mechanical Engineering at the University of Houston, with joint appointments in Electrical and Computer Engineering, Materials Science and Engineering, and Biomedical Engineering. He received his B.S. in Mechanical Engineering and M.S. in Electrical Engineering in 2004 and 2007, respectively, from Southeast University, Nanjing, China. He completed his Ph.D. in Mechanical Engineering at Arizona State University in 2010 and was trained as a postdoc at the University of Illinois at Urbana-Champaign before joining the University of Houston in 2013. Yu’s research focuses on material design, manufacturing approaches, and device technologies toward soft electronics for a broad range of applications. Yu is a recipient of the National Science Foundation Faculty Early Career Development Program (NSF CAREER) Award, Office of Naval Research (ONR) Young Investigator Award, MIT Technology Review 35 Top Innovators under the age of 35—TR35 China, Society of Manufacturing Engineers (SME) Outstanding Young Manufacturing Engineer Award, American Vacuum Society Thin Film Division Young Investigator Awards, American Chemical Society Petroleum Research Fund Doctoral New Investigator Award, 3M Non-Tenured Faculty Award, University level Award of Excellence in Research & Scholarship, and College of Engineering Junior Faculty Research Excellence Award from University of Houston. Yu’s recent research has been repor
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