title: Zinc oxide nanowire-poly(methyl methacrylate) dielectric layers for polymer capacitive pressure sensors.
abstract: Polymer capacitive pressure sensors based on a dielectric composite layer of zinc oxide nanowire and poly(methyl methacrylate) show pressure sensitivity in the range of 2.63 × 10(-3) to 9.95 × 10(-3) cm(2) gf(-1). This represents an increase of capacitance change by as much as a factor of 23 over pristine polymer devices. An ultralight load of only 10 mg (corresponding to an applied pressure of ∼0.01 gf cm(-2)) can be clearly recognized, demonstrating remarkable characteristics of these nanowire-polymer capacitive pressure sensors. In addition, optical transmittance of the dielectric composite layer is approximately 90% in the visible wavelength region. Their low processing temperature, transparency, and flexible dielectric film makes them a highly promising means for flexible touching and pressure-sensing applications.
authors.affiliation: Institute of Imaging and Biomedical Photonics, ‡Institute of Lighting and Energy Photonics, and §Institute of Photonic System, National Chiao Tung University , No. 301, Gaofa Third Road, Guiren District, Tainan 71150, Taiwan, R.O.C.
authors.forename: Yan-Sheng
authors.initials: YS
authors.lastname: Chen
authors.forename: Gen-Wen
authors.initials: GW
authors.lastname: Hsieh
authors.forename: Shih-Ping
authors.initials: SP
authors.lastname: Chen
authors.forename: Pin-Yen
authors.initials: PY
authors.lastname: Tseng
authors.forename: Cheng-Wei
authors.initials: CW
authors.lastname: Wang
mesh_terms: D025802:Electric Capacitance; D053770:Nanowires / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D011312:Pressure; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D011108:Polymers; D019904:Polymethyl Methacrylate; D015034:Zinc Oxide
keywords: capacitive pressure sensor; dielectric composite; poly(methyl methacrylate); ultralight sensitivity; zinc oxide nanowire