Full color stop bands in hybrid organic/inorganic block copolymer photonic gels by swelling-freezing.
We report a facile way of fabricating hybrid organic/inorganic photonic gels by selective swelling and subsequent infiltration of SiO(2) 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 SiO(2) 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.
Department of Chemistry, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.
Changjoon
C
Kang
Eunjoo
E
Kim
Heeyoel
H
Baek
Kyosung
K
Hwang
Dongwoo
D
Kwak
Youngjong
Y
Kang
Edwin L
EL
Thomas