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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/18025

Title: Sum-Frequency Generation and Scanning Electron Microscope Studies on Second-Harmonic Generation Active Structures of Sacran Aggregates
Authors: Phan, Thang Dinh
Mizutani, Goro
Li, Yanrong
Budpud, Kulisara
Okeyoshi, Kosuke
Okajima, Maiko
Kaneko, Tatsuo
Keywords: Sacran
SHG microscopy
SFG spectroscopy
Scanning electron microscope (SEM)
Energy-dispersive X-ray spectroscopy(EDS)
Issue Date: 2022-04-21
Publisher: The Japan Society of Vacuum and Surface Science
Magazine name: e-Journal of Surface Science and Nanotechnology
Volume: 20
Start page: 98
End page: 106
DOI: 10.1380/ejssnt.2022-016
Abstract: Optical second-harmonic generation (SHG) in self-assembled ampholytic mega-molecule polysaccharide sacran is an interesting phenomenon but its origin has not been clarified. SHG-active sacran aggregates in dried cast films made from ultrasonicated 0.5 wt% sacran aqueous solutions were studied at microscale using the scanning electron microscope and the energy dispersive X-ray technology. Hexagonal morphology was observed frequently with the size of a few to tens of micrometers. The calcium density was higher in the area showing the SHG signals. In sum-frequency generation spectra of the SHG-active sacran aggregates, vibrational modes of functional groups such as CH_3, CH_2, and −COOH of the sacran molecules and OH of the water molecules were identified. The structure of the SHG-active sacran aggregates was modeled from the observed facts.
Rights: Thang Dinh Phan, Goro Mizutani, Yanrong Li, Kulisara Budpud, Kosuke Okeyoshi, Maiko Okajima, Tatsuo Kaneko, e-Journal of Surface Science and Nanotechnology, 20, 2022, pp.98-106. DOI:/10.1380/ejssnt.2022-016. All articles published on e-J. Surf. Sci. Nanotechnol. are licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0). You are free to copy and redistribute articles in any medium or format and also free to remix, transform, and build upon articles for any purpose (including a commercial use) as long as you give appropriate credit to the original source and provide a link to the Creative Commons (CC) license. If you modify the material, you must indicate changes in a proper way.
URI: http://hdl.handle.net/10119/18025
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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