title: An ultra-sensitive resistive pressure sensor based on hollow-sphere microstructure induced elasticity in conducting polymer film.
abstract: Pressure sensing is an important function of electronic skin devices. The development of pressure sensors that can mimic and surpass the subtle pressure sensing properties of natural skin requires the rational design of materials and devices. Here we present an ultra-sensitive resistive pressure sensor based on an elastic, microstructured conducting polymer thin film. The elastic microstructured film is prepared from a polypyrrole hydrogel using a multiphase reaction that produced a hollow-sphere microstructure that endows polypyrrole with structure-derived elasticity and a low effective elastic modulus. The contact area between the microstructured thin film and the electrodes increases with the application of pressure, enabling the device to detect low pressures with ultra-high sensitivity. Our pressure sensor based on an elastic microstructured thin film enables the detection of pressures of less than 1Pa and exhibits a short response time, good reproducibility, excellent cycling stability and temperature-stable sensing.
authors.affiliation: 1] Jiangsu Provincial Key Laboratory of Photonic and Electronic Materials, School of Electronic Science and Engineering, National Center of Microstructures and Quantum Manipulation, Nanjing University, Nanjing 210093, China [2] Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA [3].
authors.forename: Lijia
authors.initials: L
authors.lastname: Pan
authors.affiliation: 1] Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA [2].
authors.forename: Alex
authors.initials: A
authors.lastname: Chortos
authors.affiliation: Department of Mechanical Engineering and Materials Science and Engineering Program, The University of Texas at Austin, Austin, Texas 78712, USA.
authors.forename: Guihua
authors.initials: G
authors.lastname: Yu
authors.affiliation: Jiangsu Provincial Key Laboratory of Photonic and Electronic Materials, School of Electronic Science and Engineering, National Center of Microstructures and Quantum Manipulation, Nanjing University, Nanjing 210093, China.
authors.forename: Yaqun
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Scott
authors.initials: S
authors.lastname: Isaacson
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Ranulfo
authors.initials: R
authors.lastname: Allen
authors.affiliation: Jiangsu Provincial Key Laboratory of Photonic and Electronic Materials, School of Electronic Science and Engineering, National Center of Microstructures and Quantum Manipulation, Nanjing University, Nanjing 210093, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Reinhold
authors.initials: R
authors.lastname: Dauskardt
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Bao