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Scanning Electron Microscopy (SEM) Energy Dispersive X-ray Spectroscopy (EDS) Mapping and In-situ Observation of Carbonization of Culms of Bambusa Multiplex

Published online by Cambridge University Press:  27 April 2018

Visittapong Yordsri ,
Chanchana Thanachayanont ,
Shunsuke Asahina ,
Yuuki Yamaguchi ,
Masahiro Kawasaki ,
Tetsuo Oikawa ,
Tadashi Nobuchi  and
Makoto Shiojiri
Visittapong Yordsri
Affiliation:
National Metal and Materials Technology Center, 114 Thailand Science Park, Paholyothin Rd., Klong 1, Klong Luang, Pathumthani 12120, Thailand
Chanchana Thanachayanont
Affiliation:
National Metal and Materials Technology Center, 114 Thailand Science Park, Paholyothin Rd., Klong 1, Klong Luang, Pathumthani 12120, Thailand
Shunsuke Asahina
Affiliation:
JEOL Ltd., SM Application Group, Akishima, Tokyo 196-8558, Japan
Yuuki Yamaguchi
Affiliation:
JEOL Ltd., SM Application Group, Akishima, Tokyo 196-8558, Japan
Masahiro Kawasaki*
Affiliation:
JEOL USA Inc., 11 Dearborn Road, Peabody, MA 01960, USA
Tetsuo Oikawa
Affiliation:
4JEOL Asia PTE Ltd., Co Regn No: 199500744W, 2 Corporation Road #01-12, Corporation Place 618494, Singapore
Tadashi Nobuchi
Affiliation:
Kyoto University (emeritus), Yoshidahonmachi, Sakyo Ward, Kyoto 606-8501, Japan
Makoto Shiojiri
Affiliation:
Kyoto Institute of Technology (emeritus), Matsugasaki Hashikamicho, Sakyo Ward, Kyoto 606-8585, Japan
*
*Author for correspondence: Masahiro Kawasaki, E-mail: kawasakis@mac.com
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Abstract

Green culms of bamboo and charcoal of Bambusa multiplex were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) mapping. A dynamic observation of the initial stage of carbonization was also performed in-situ by heating a radial longitudinal section of the bamboo culm at a rate of 20°C/min up to 500°C. EDS mapping of the green bamboo culms detected Si signals in the harder cells such as the epidermis (Ep), cortex (Cor) and vascular bundle sheath (Bs) and between these cells as silicon oxide particles. Appreciable morphological change of the cells occurred in a temperature range of about 300–400°C due to the decomposition of cellulose that is the main component of the bamboo cells. The charcoal of the bamboo culm has a skin layer which originates from the Ep and Cor and the main central cylinder with many openings that originate from the expanded xylem and phloem holes. During carbonization, the Si atoms in the Ep and Cor were segregated as thin silicon oxide layers onto both the sides of the skin layer and the Si included in the Bs fibers and parenchyma cells accumulated near the walls of the openings.

Keywords

bambooBambusa multiplexcarbonizationenergy dispersive X-ray spectroscopy mappingin-situ observation
Type
Biological Science Applications
Information
Microscopy and Microanalysis , Volume 24 , Issue 2 , April 2018 , pp. 156 - 162
Copyright
© Microscopy Society of America 2018 

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Footnotes

*

Present address: Applied Materials, Inc., 3330 Scott Blvd., Bldg 6, Santa Clara, CA 95054, USA.

References

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