Quantifying electric field gradient fluctuations over polymers using ultrasensitive cantilevers

Showkat M. Yazdanian, Nikolas Hoepker, Seppe Kuehn, Roger F. Loring, John A. Marohn

Research output: Contribution to journalArticle

Abstract

An ultrasensitive cantilever, oscillating parallel to a surface in vacuum, is used to probe weak thermal electric field gradient fluctuations over thin polymer films. We measure the power spectrum of cantilever frequency fluctuations as a function of cantilever height and voltage over polymers of various compositions and thicknesses. The data are well described by a linear-response theory that calculates stochastic electric fields arising from thermally driven dielectric fluctuations.

Original languageEnglish (US)
Pages (from-to)2273-2279
Number of pages7
JournalNano letters
Volume9
Issue number6
DOIs
StatePublished - Jun 10 2009

ASJC Scopus subject areas

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

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