Affordable Access

deepdyve-link
Publisher Website

Optical second-harmonic images of sacran megamolecule aggregates.

Authors
  • Zhao, Yue
  • Thu Hien, Khuat Thi
  • Mizutani, Goro
  • Rutt, Harvey N
  • Amornwachirabodee, Kittima
  • Okajima, Maiko
  • Kaneko, Tatsuo
Type
Published Article
Journal
Journal of the Optical Society of America A
Publisher
The Optical Society
Publication Date
Feb 01, 2017
Volume
34
Issue
2
Pages
146–152
Identifiers
DOI: 10.1364/JOSAA.34.000146
PMID: 28157840
Source
Medline
License
Unknown

Abstract

We have detected a second-order nonlinear optical response from aggregates of the ampholytic megamolecular polysaccharide sacran extracted from cyanobacterial biomaterials by using optical second-harmonic-generation (SHG) microscopy. The SHG images of sacran cotton-like lump, fibers, and cast films showed SHG intensity microspots of several tens of micrometers in size. The dependence of the SHG spot intensity on an excitation light polarization angle was observed to illustrate sacran molecular orientation in these microdomains. We also observed SHG signals around a special region of the cast film edges of sacran. These results show that sacran megamolecules aggregate in several different ways.

Report this publication

Statistics

Seen <100 times