Full Color Stop Bands in Hybrid Organic/Inorganic Block Copolymer Photonic Gels by Swelling−Freezing

详细信息    查看全文

• 作者：Changjoon Kang ; Eunjoo Kim ; Heeyoel Baek ; Kyosung Hwang ; Dongwoo Kwak ; Youngjong Kang ; Edwin L. Thomas
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：June 10, 2009
• 年：2009
• 卷：131
• 期：22
• 页码：7538-7539
• 全文大小：145K
• 年卷期：v.131,no.22(June 10, 2009)
• ISSN：1520-5126

文摘

We report a facile way of fabricating hybrid organic/inorganic photonic gels by selective swelling and subsequent infiltration of SiO₂ into one type of lamellar microdomain previously self-assembled from modest-molecular-weight block copolymers. Transparent, in-plane lamellar films were first prepared by assembly of polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP), and subsequently the P2VP domains were swollen with a selective solvent, methanol. The swollen structures were then fixated by synthesizing SiO₂ nanoparticles within P2VP domains. The resulting frozen photonic gels (f-photonic gels) exhibited strong reflective colors with stop bands across the visible region of wavelengths.