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Sub-nanoscale nanoimprint fabrication of atomically stepped glassy substrates of silicate glass and acryl polymer

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Abstract

In the nanoimprint process, the resolution limit of patterning has attracted much attention from both scientific and industrial aspects. In this article, we briefly review the main achievements of our research group on sub-nanoscale nanoimprint fabrication of atomically patterned glassy substrates of oxide glass and polymer. By applying the sapphire (α-Al2O3 single crystal) wafers with self-organized nanopatterns of atomic steps as thermal nanoimprinting molds, we successfully transferred their nanoscale patterns onto the surfaces of glassy substrates such as soda-lime silicate glasses and poly(methyl methacrylate) polymers. The surfaces of nanoimprinted glassy materials exhibited regularly arrayed atomic stairs with 0.2–0.3 nm step height, which were in good agreement with the sub-nanopatterns of sapphire molds. These atomically stepped morphologies on the glassy substrates were found to be stable for about 1 year.

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Acknowledgments

The author would like to thank laboratory members, who had contributed to the development of the sub-nanoscale nanoimprint technology, especially to Dr. S. Akiba, Dr. W. Hara, Dr. A. Matsuda, Dr. Y. Akita, Y. Sugimoto, Y. Miyake, N. Inoue, G. Tan, T. Funabasama, and Dr. S. Kaneko. The author also appreciates the helpful discussions of Professor Y. Hirai (Osaka Pref. Univ.), Professor K. Tada (Toyama Nat’l Col. Tech.), Professor M. Nakagawa (Tohoku Univ.), Mr. H. Oi (Kyodo Int’l Co.), Mr. M. Mita (Kyodo Int’l Co.), Mr. O. Suga (EIDEC Co.), Mr. K. Koyama (Namiki Precision Jewel Co.), and Mr. K. Sunakawa (Namiki Precision Jewel Co.). This work was partly supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan, New Energy and Industrial Technology Development Organization (NEDO), and Nippon Sheet Glass Foundation for Materials Science and Engineering.

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  1. Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259-J3-16, Nagatsuta, Midori, Yokohama, 226-8502, Japan

    Mamoru Yoshimoto

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  1. Mamoru Yoshimoto
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Correspondence to Mamoru Yoshimoto.

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Yoshimoto, M. Sub-nanoscale nanoimprint fabrication of atomically stepped glassy substrates of silicate glass and acryl polymer. Appl. Phys. A 121, 321–326 (2015). https://doi.org/10.1007/s00339-015-9247-4

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