Bacterium organizes hierarchical amorphous structure in microbial cellulose

S. Koizumi, Z. Yue, Y. Tomita, T. Kondo, H. Iwase, D. Yamaguchi, T. Hashimoto

Research output: Contribution to journalArticle

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Abstract

A pellicle, a gel film of microbial cellulose, is a supermolecular system containing 99% of water by weight, which is closely related to an amorphous structure in it. Using ultra-small-angle neutron scattering, in order to cover over a wide range of length scales from nm to 10μm, we examined the hierarchical amorphous structure in the microbial cellulose, which is synthesized by a bacterium (Acetobacter xylinum). The microbial cellulose swollen by water shows small-angle scattering that obeys a power law q -behavior according to q as a function of the magnitude of the scattering vector q . The power law, determined by scattering, is attributed to a mass fractal due to the distribution of the center of mass for the crystallite (microfibril) in amorphous cellulose swollen by water. As q increases, α takes the values of 2.5, 1, and 2.35, corresponding, respectively, to a gel network composed of bundles, a bundle composed of cellulose ribbons, and concentration fluctuations in a bundle. From the mass fractal q -behavior and its length scale limits, we evaluated a volume fraction of crystallite in microbial cellulose. It was found that 90% of the cellulose bundle is occupied by amorphous cellulose containing water.

Original languageEnglish
Pages (from-to)137-142
Number of pages6
JournalEuropean Physical Journal E
Volume26
Issue number1-2
DOIs
Publication statusPublished - May 1 2008

Fingerprint

cellulose
Cellulose
bacteria
Bacteria
bundles
Small Angle Scattering
Fractals
Water
Scattering
water
fractals
Gluconacetobacter xylinus
Gels
Acetobacter
scattering
gels
pellicle
Microfibrils
Neutrons
Neutron scattering

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Chemistry(all)
  • Materials Science(all)
  • Surfaces and Interfaces

Cite this

Koizumi, S., Yue, Z., Tomita, Y., Kondo, T., Iwase, H., Yamaguchi, D., & Hashimoto, T. (2008). Bacterium organizes hierarchical amorphous structure in microbial cellulose. European Physical Journal E, 26(1-2), 137-142. https://doi.org/10.1140/epje/i2007-10259-3

Bacterium organizes hierarchical amorphous structure in microbial cellulose. / Koizumi, S.; Yue, Z.; Tomita, Y.; Kondo, T.; Iwase, H.; Yamaguchi, D.; Hashimoto, T.

In: European Physical Journal E, Vol. 26, No. 1-2, 01.05.2008, p. 137-142.

Research output: Contribution to journalArticle

Koizumi, S, Yue, Z, Tomita, Y, Kondo, T, Iwase, H, Yamaguchi, D & Hashimoto, T 2008, 'Bacterium organizes hierarchical amorphous structure in microbial cellulose', European Physical Journal E, vol. 26, no. 1-2, pp. 137-142. https://doi.org/10.1140/epje/i2007-10259-3
Koizumi, S. ; Yue, Z. ; Tomita, Y. ; Kondo, T. ; Iwase, H. ; Yamaguchi, D. ; Hashimoto, T. / Bacterium organizes hierarchical amorphous structure in microbial cellulose. In: European Physical Journal E. 2008 ; Vol. 26, No. 1-2. pp. 137-142.
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