Acoustic modes and elastic properties of polymeric nanostructures

R. D. Hartschuh, A. Kisliuk, V. Novikov, A. P. Sokolov, P. R. Heyliger, C. M. Flannery, W. L. Johnson, C. L. Soles, W. L. Wu

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Phonon spectra of polymeric linear nanostructures have been characterized using Brillouin light scattering. In addition to phonon modes similar to those present in uniform thin films, the phonon spectra of the nanolines reveal a new mode with a lower frequency that depends on the width of the nanolines. Classic wave theory and finite element analysis were combined to identify this new mode as a flexural vibration of the nanolines. Analysis of the phonon spectra gave estimates of elastic constants in the nanostructures and indicated that there is no significant deviation from bulk mechanical properties and no mechanical anisotropy in structures as small as 88 nm.

Original languageEnglish
Article number173121
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number17
DOIs
StatePublished - Oct 24 2005
Externally publishedYes

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