Li Yunfeng, Sun Zhiqiang, Zhang Junhu, Zhang Kai, Wang Yanfang, Wang Zhanhua, Chen Xiaolu, Zhu Shoujun, Yang Bai
State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China.
J Colloid Interface Sci. 2008 Sep 15;325(2):567-72. doi: 10.1016/j.jcis.2008.06.019. Epub 2008 Jun 13.
High-quality and stable PS@TiO(2) core-shell microsphere colloidal crystals were prepared by electrostatic colloid stabilization combined with two-substrate vertical deposition method. The polyelectrolyte stabilized colloids self-assembled into face-centered cubic arrays with the (111) face perpendicular to the substrate. These colloidal crystals are gifted with high mechanical stability toward the flow of solution. Structure-property correlations were made using scanning electron microscopy and UV-vis-NIR spectroscopy. Optical spectra showed the presence of an L-stopband peak in the photonic band structure. Besides, these PS@TiO(2) colloidal crystals can be used as templates to fabricate the nonspherical macro-porous materials, and complete band gaps can be more easily obtained from such structure than from their spherical counterparts due to their lower symmetries. This work will hold the promise of enhanced photonic band gap materials.
通过静电胶体稳定法结合双衬底垂直沉积法制备了高质量且稳定的PS@TiO(2)核壳微球胶体晶体。聚电解质稳定的胶体自组装成面心立方阵列，其(111)面垂直于衬底。这些胶体晶体对溶液流动具有很高的机械稳定性。利用扫描电子显微镜和紫外-可见-近红外光谱进行了结构-性能相关性研究。光谱显示在光子带结构中存在一个L-阻带峰。此外，这些PS@TiO(2)胶体晶体可用作模板来制备非球形大孔材料，由于其对称性较低，与球形对应物相比，从这种结构更容易获得完整的带隙。这项工作有望增强光子带隙材料。
