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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 1 — Jan. 4, 2012

Sum Frequency Generation Microscopy Study of Cellulose Fibers

Hoang Chi Hieu, Nguyen Anh Tuan, Hongyan Li, Yoshihiro Miyauchi, and Goro Mizutani

Applied Spectroscopy, Vol. 65, Issue 11, pp. 1254-1259 (2011)


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Abstract

Sum frequency generation (SFG) microscopy images of cotton cellulose fibers were observed at the infrared wavenumber of ∼ 2945 cm–1 and with a spatial resolution of 2 μm. Domains of different cellulose microfibril bunches were observed and they showed different second-order nonlinear responses. The intensity of the peak of the asymmetric CH2 stretching mode at 2945 cm–1 depended strongly on the orientation of the electric fields of the incident visible and infrared light with respect to the cellulose fiber axis. The second-order nonlinear susceptibility arising from the chirality in the cellulose structure was found to be dominant. The SFG of the cross section of the cellulose fiber was relatively weak and showed a different spectrum from that measured from the side of the fiber axis.

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Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Hoang Chi Hieu, Nguyen Anh Tuan, Hongyan Li, Yoshihiro Miyauchi, and Goro Mizutani, "Sum Frequency Generation Microscopy Study of Cellulose Fibers," Appl. Spectrosc. 65, 1254-1259 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-65-11-1254


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