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Article

Fabrication of Ultrafine, Highly Ordered Nanostructures Using Carbohydrate-Inorganic Hybrid Block Copolymers

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Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan
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Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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Centre de Recherches sur les Macromolécules Végétales (CERMAV), Centre National de la Recherche Scientifique (CNRS), Université Grenoble Alpes, F-38000 Grenoble, France
*
Authors to whom correspondence should be addressed.
Academic Editor: Ullrich Scherf
Nanomaterials 2022, 12(10), 1653; https://doi.org/10.3390/nano12101653
Received: 21 April 2022 / Revised: 10 May 2022 / Accepted: 10 May 2022 / Published: 12 May 2022
Block copolymers (BCPs) have garnered considerable interest due to their ability to form microphase-separated structures suitable for nanofabrication. For these applications, it is critical to achieve both sufficient etch selectivity and a small domain size. To meet both requirements concurrently, we propose the use of oligosaccharide and oligodimethylsiloxane as hydrophilic and etch-resistant hydrophobic inorganic blocks, respectively, to build up a novel BCP system, i.e., carbohydrate-inorganic hybrid BCP. The carbohydrate-inorganic hybrid BCPs were synthesized via a click reaction between oligodimethylsiloxane with an azido group at each chain end and propargyl-functionalized maltooligosaccharide (consisting of one, two, and three glucose units). In the bulk state, small-angle X-ray scattering revealed that these BCPs microphase separated into gyroid, asymmetric lamellar, and symmetric lamellar structures with domain-spacing ranging from 5.0 to 5.9 nm depending on the volume fraction. Additionally, we investigated microphase-separated structures in the thin film state and discovered that the BCP with the most asymmetric composition formed an ultrafine and highly oriented gyroid structure as well as in the bulk state. After reactive ion etching, the gyroid thin film was transformed into a nanoporous-structured gyroid SiO2 material, demonstrating the material’s promising potential as nanotemplates. View Full-Text
Keywords: organic–inorganic hybrid; block copolymer; self-assembly; microphase-separated structure; gyroid structure organic–inorganic hybrid; block copolymer; self-assembly; microphase-separated structure; gyroid structure
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MDPI and ACS Style

Nishimura, T.; Katsuhara, S.; Lee, C.; Ree, B.J.; Borsali, R.; Yamamoto, T.; Tajima, K.; Satoh, T.; Isono, T. Fabrication of Ultrafine, Highly Ordered Nanostructures Using Carbohydrate-Inorganic Hybrid Block Copolymers. Nanomaterials 2022, 12, 1653. https://doi.org/10.3390/nano12101653

AMA Style

Nishimura T, Katsuhara S, Lee C, Ree BJ, Borsali R, Yamamoto T, Tajima K, Satoh T, Isono T. Fabrication of Ultrafine, Highly Ordered Nanostructures Using Carbohydrate-Inorganic Hybrid Block Copolymers. Nanomaterials. 2022; 12(10):1653. https://doi.org/10.3390/nano12101653

Chicago/Turabian Style

Nishimura, Taiki, Satoshi Katsuhara, Chaehun Lee, Brian J. Ree, Redouane Borsali, Takuya Yamamoto, Kenji Tajima, Toshifumi Satoh, and Takuya Isono. 2022. "Fabrication of Ultrafine, Highly Ordered Nanostructures Using Carbohydrate-Inorganic Hybrid Block Copolymers" Nanomaterials 12, no. 10: 1653. https://doi.org/10.3390/nano12101653

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