Biodirected epitaxial nanodeposition of polymers on oriented macromolecular templates

Tetsuo Kondo, Masanobu Nojiri, Yukako Hishikawa, Eiji Togawa, Dwight Romanovicz, R. Malcolm Brown

研究成果: Contribution to journalArticle査読

72 被引用数 (Scopus)

抄録

Biodirected epitaxial nanodeposition of polymers was achieved on a template with an oriented molecular surface. Acetobacter xylinum synthesized a ribbon of cellulose I microfibrils onto a fixed, nematic ordered substrate of glucan chains with unique surface characteristics. The substrate directed the orientation of the motion due to the inverse force of the secretion during biosynthesis, and the microfibrils were aligned along the orientation of the molecular template. Using real-time video analysis, the patterns and rates of deposition were elucidated. Field emission scanning electron microscopy revealed that a strong molecular interaction allowed for the deposition of nascent biosynthesized 3.5-nm cellulose microfibrils with inter-microfibrillar spacings of 7-8 nm on the surface of the template. The cellulose was deposited parallel to the molecular orientation of the template. Directed cellulose synthesis and ordered movement of cells were observed only by using a nematic ordered substrate made from cellulose, and not from ordered crystalline cellulose substrates or ordered cellulose-related synthetic polymers such as polyvinyl alcohol. This unique relationship between directed biosynthesis and the ordered fabrication from the nano to the micro scales could lead to new methodologies for the design of functional materials with desired nanostructures.

本文言語英語
ページ(範囲)14008-14013
ページ数6
ジャーナルProceedings of the National Academy of Sciences of the United States of America
99
22
DOI
出版ステータス出版済み - 10 29 2002
外部発表はい

All Science Journal Classification (ASJC) codes

  • General

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