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Citation: WANG Jie, XU Sheng-Hua, SUN Zhi-Wei, ZHOU Hong-Wei. Immobilization of Charged Colloidal Crystals in a Polymer Matrix[J]. Acta Physico-Chimica Sinica, ;2009, 25(05): 970-976. doi: 10.3866/PKU.WHXB20090531 shu

Immobilization of Charged Colloidal Crystals in a Polymer Matrix

1.
Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P. R. China; College of Chemistry, Chemical Engineering and Material Science, Shandong Normal University, Jinan 250014, P. R. China

Received Date: 18 January 2009
Available Online: 26 March 2009

We immobilized colloidal crystals of charged particles in a poly (acrylamide) matrix by photoinduced polymerization. A reflection spectrum and Kossel-line diffraction were employed to trace and compare changes in the colloidal crystal structure before and after immobilization processing. Our experiments showed that immobilized colloidal crystals successfully retained the structure of colloidal crystals unless the sizes and the lattice spacings of the immobilized colloidal crystals decreased slightly. By observing the structure of immobilized crystals in Milli-Q water we confirmed that the lattice spacings of the crystals varied for several days initially during immobilization because of gel swelling or de-swelling. After reaching a balance (2-5 d), the immobilized colloidal crystals are found to be stable in Milli-Q water. Our study thus explores potential applications of colloidal crystals such as their use in photonic materials.
- Colloidal crystal,
- Immobilization,
- Gel,
- Reflection spectrum,
- Kossel-line diffraction
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