Transparent Nanocomposites Based on Cellulose Produced by Bacteria Offer Potential Innovation in the Electronics Device Industry


  • We gratefully acknowledge fruitful discussions with, and revision of the manuscript by, A. N. Nakagaito. We thank P. J. Collins, R. M. Rowell, and P. Uhlherr for valuable revision of the manuscript. This work was partly supported by a grant-in-aid from the International Innovation Center, Kyoto University and Special Coordination Funds for Promoting Science and Technology from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. It was carried out as a part of the Integrative Industry-Academia Partnership between Kyoto University and five companies (Nippon Telegraph and Telephone Corporation, Pioneer Corporation, Hitachi, Ltd., Mitsubishi Chemical Corporation, and Rohm Co., Ltd.) for the development of new technologies in the field of organic electronic materials and devices.


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Bacterial cellulose (BC) pellicles consist of a layered structure of planar nanofiber networks, which enables the production of optically transparent composites with an ultralow coefficient of thermal expansion comparable to that of silicon crystal. The BC nanofiber networks suppress crack propagation in the brittle matrix resin, resulting in composites that can be bent without damage (see figure).