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 language | English (US) |
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Pages (from-to) | 2273-2279 |
Number of pages | 7 |
Journal | Nano letters |
Volume | 9 |
Issue number | 6 |
DOIs | |
State | Published - Jun 10 2009 |
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering