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Adv Mater. 2013 Jun 4;25(21):2920-5. doi: 10.1002/adma.201300657. Epub 2013 Apr 25.

High-power density piezoelectric energy harvesting using radially strained ultrathin trigonal tellurium nanowire assembly.

Author information

1
Department of Materials Science and Engineering, Yonsei University, Seoul, Korea.

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.

KEYWORDS:

monolayer assembly; nanogenerator; piezoelectricity; trigonal tellurium nanowire

PMID:
23616287
DOI:
10.1002/adma.201300657
[Indexed for MEDLINE]
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