Inorganic Gyroid with Exceptionally Low Refractive Index from Block Copolymer Templating

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• 作者：Han-Yu Hsueh ; Hung-Ying Chen ; Ming-Shiuan She ; Chun-Ku Chen ; Rong-Ming Ho ; Shangjr Gwo ; Hirokazu Hasegawa ; Edwin L. Thomas
• 刊名：Nano Letters
• 出版年：2010
• 出版时间：December 8, 2010
• 年：2010
• 卷：10
• 期：12
• 页码：4994-5000
• 全文大小：515K
• 年卷期：v.10,no.12(December 8, 2010)
• ISSN：1530-6992

文摘

Nanoporous polymers with gyroid nanochannels can be fabricated from the self-assembly of degradable block copolymer, polystyrene-b-poly(l-lactide) (PS-PLLA), followed by the hydrolysis of PLLA blocks. A well-defined nanohybrid material with SiO₂ gyroid nanostructure in a PS matrix can be obtained using the nanoporous PS as a template for sol-gel reaction. After subsequent UV degradation of the PS matrix, a highly porous inorganic gyroid network remains, yielding a single-component material with an exceptionally low refractive index (as low as 1.1).

Keywords:

Sol-gel process; low-n materials; degradable block copolymers; templates; gyroid