In situ quantitative study of nanoscale triboelectrification and patterning

Yu Sheng Zhou, Ying Liu, Guang Zhu, Zong Hong Lin, Caofeng Pan, Qingshen Jing, Zhong Lin Wang

Research output: Journal PublicationArticlepeer-review

153 Citations (Scopus)

Abstract

By combining contact-mode atomic force microscopy (AFM) and scanning Kevin probe microscopy (SKPM), we demonstrated an in situ method for quantitative characterization of the triboelectrification process at the nanoscale. We systematically characterized the triboelectric charge distribution, multifriction effect on charge transfer, as well as subsequent charge diffusion on the dielectric surface: (i) the SiO2 surface can be either positively or negatively charged through triboelectric process using Si-based AFM probes with and without Pt coating, respectively; (ii) the triboelectric charges accumulated from multifriction and eventually reached to saturated concentrations of (-150 ± 8) μC/m2 and (105 ± 6) μC/m2, respectively; (iii) the charge diffusion coefficients on SiO2 surface were measured to be (1.10 ± 0.03) × 10 -15 m2/s for the positive charge and (0.19 ± 0.01) × 10-15 m2/s for the negative charges. These quantifications will facilitate a fundamental understanding about the triboelectric and de-electrification process, which is important for designing high performance triboelectric nanogenerators. In addition, we demonstrated a technique for nanopatterning of surface charges without assistance of external electric field, which has a promising potential application for directed self-assembly of charged nanostructures for nanoelectronic devices.

Original languageEnglish
Pages (from-to)2771-2776
Number of pages6
JournalNano Letters
Volume13
Issue number6
DOIs
Publication statusPublished - 12 Jun 2013
Externally publishedYes

Keywords

  • TENG
  • Triboelectric
  • atomic force microscopy
  • nanogenerators
  • scanning Kelvin probe microscopy

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanical Engineering

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