Terahertz Dynamics of Carboxymethyl Starch

POSTER

Abstract

We performed terahertz time-domain spectroscopy on microwave-treated sodium carboxymethyl starch (CM-Starch), to detect the boson peak and fracton. Starch is a natural polymer formed by polymerization of a number of D-glucose molecules by glycosidic linkage and CM-Starch is produced by carboxymethylating the starch. The obtained spectral shape of boson peak plot α(ν)/ν2 of the CM-Starch, where α(ν) is the absorption coefficient, is different from vitreous glucose. It suggests the existence of the fracton in the CM-Starch.

Presenters

  • Leona Motoji

    Division of Materials Science, University of Tsukuba

Authors

  • Wakana Terao

    Division of Materials Science, University of Tsukuba

  • Leona Motoji

    Division of Materials Science, University of Tsukuba

  • Tatsuya Mori

    Division of Materials Science, University of Tsukuba

  • Karolina Kaczmarska

    Faculty of Foundry Engineering, AGH University of Science and Technology

  • Beata Grabowska

    Faculty of Foundry Engineering, AGH University of Science and Technology

  • Yasuhiro Fujii

    Department of Physical Sciences, Ritsumeikan University

  • Akitoshi Koreeda

    Department of Physical Sciences, Ritsumeikan University

  • Mikitoshi Kabeya

    Division of Materials Science, University of Tsukuba

  • Jae-Hyon Ko

    Department of Physics, Hallym University

  • Seiji Kojima

    Division of Materials Science, University of Tsukuba