期刊
SOFT MATTER
卷 7, 期 9, 页码 4156-4159出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1sm05065f
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资金
- National Natural Science Foundation of China [20725414]
- Ministry of Science and Technology of China [2007CB936400]
Amphoteric one-dimensional photonic crystal (PC) based on poly-styrene-b-poly(2-vinyl pyridine) (PS-b-P2VP) block copolymer was developed by intercalation polymerization of acrylic acid and 2-hydroxyethyl methacrylate in the partly quaternized P2VP (QP2VP) layers. The amphoteric PC reversibly exhibits a high first Bragg peak position (lambda(max) > 700 nm) at both acidic and basic pH values where the QP2VP layers are positively and negatively charged respectively. The minimum lambda(max) (300 nm) at pH 5.5 can be observed due to charge screening. The PC with a U-shaped pH response also shows good durability.
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