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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 5 — Feb. 27, 2012
  • pp: 5119–5126

Low-frequency Raman scattering of bioinspired self-assembled diphenylalanine nanotubes/microtubes

Xinglong Wu, Shijie Xiong, Minjie Wang, Jiancang Shen, and Paul K. Chu  »View Author Affiliations

Optics Express, Vol. 20, Issue 5, pp. 5119-5126 (2012)

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Low-frequency Raman scattering from self-assembled bioinspired diphenylalanine (FF) nanotubes/microtubes (NTs/MTs) has been observed for the first time. Four double peaks are identified as the three-dimensional localized collective (acoustic phonon) vibrations of FF molecules in the subnanometer crystalline structure (biological building block) forming the FF NTs/MTs. The increased energy separations between two subpeaks caused by the loss of water in the nanochannel cores are due to the enhancement of vibrational couplings between the FF molecules as a result of the reduction of the influence from water on the coupling. The results provide experimental evidence of localized but still weakly coupled vibrations in organic crystalline nanostructures in the low-frequency region.

© 2012 OSA

OCIS Codes
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(300.6450) Spectroscopy : Spectroscopy, Raman
(160.1435) Materials : Biomaterials

ToC Category:

Original Manuscript: November 14, 2011
Revised Manuscript: December 29, 2011
Manuscript Accepted: January 12, 2012
Published: February 16, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Xinglong Wu, Shijie Xiong, Minjie Wang, Jiancang Shen, and Paul K. Chu, "Low-frequency Raman scattering of bioinspired self-assembled diphenylalanine nanotubes/microtubes," Opt. Express 20, 5119-5126 (2012)

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