title: High-power density piezoelectric energy harvesting using radially strained ultrathin trigonal tellurium nanowire assembly.
abstract: A high-yield solution-processed ultrathin (<10 nm) trigonal tellurium (t-Te) nanowire (NW) is introduced as a new class of piezoelectric nanomaterial with a six-fold higher piezoelectric constant compared to conventional ZnO NWs for a high-volume power-density nanogenerator (NG). While determining the energy-harvesting principle in a NG consisting of t-Te NW, it is theoretically and experimentally found that t-Te NW is piezoelectrically activated only by creating strain in its radial direction, along which it has an asymmetric crystal structure. Based upon this mechanism, a NG with a monolayer consisting of well-aligned t-Te NWs and a power density of 9 mW/cm(3) is fabricated.
authors.affiliation: Department of Materials Science and Engineering, Yonsei University, Seoul, Korea.
authors.forename: Tae Il
authors.initials: TI
authors.lastname: Lee
authors.forename: Sangmin
authors.initials: S
authors.lastname: Lee
authors.forename: Eungkyu
authors.initials: E
authors.lastname: Lee
authors.forename: Sungwoo
authors.initials: S
authors.lastname: Sohn
authors.forename: Yean
authors.initials: Y
authors.lastname: Lee
authors.forename: Sujeong
authors.initials: S
authors.lastname: Lee
authors.forename: Geondae
authors.initials: G
authors.lastname: Moon
authors.forename: Dohyang
authors.initials: D
authors.lastname: Kim
authors.forename: Youn Sang
authors.initials: YS
authors.lastname: Kim
authors.forename: Jae Min
authors.initials: JM
authors.lastname: Myoung
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D011211:Electric Power Supplies; D004867:Equipment Design; D008958:Models, Molecular; D008968:Molecular Conformation; D053770:Nanowires / Q000737:chemistry*; D013691:Tellurium / Q000737:chemistry*
chemical_list: D013691:Tellurium
keywords: monolayer assembly; nanogenerator; piezoelectricity; trigonal tellurium nanowire