Structural and optical characterization of 3D binary colloidal crystal and inverse opal films prepared by direct co-deposition
Structural and optical characterization of 3D binary colloidal crystal and inverse opal films prepared by direct co-deposition
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DOI：
10.1039/b715329e
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发表时间：
2008-01-01
影响因子：
--
通讯作者：
Jonas, Ulrich
中科院分区：
文献类型：
--
作者：
Wang, Jianjun;Ahl, Stefanie;Jonas, Ulrich
两种尺寸的胶体颗粒已共沉积从混合悬浮液通过垂直转移制备二元胶体晶体（BCC）和反蛋白石（IO）与长程有序，推导出的结构表征通过SEM和可见-近红外光谱。因此，所描述的程序允许在单个步骤中通过垂直提升沉积用胶体颗粒混合物形成分级结构。从理论上分析了这些二元结构中晶格几何的特殊性。从所获得的二氧化硅IO模板，金-二氧化硅混合IO和金蛋白石复制品与分级孔结构的制造。金-二氧化硅混合IO在其可见-近红外光谱中显示出对周围介质的折射率变化的等离子体响应，这可以用于化学和生物传感应用。
Colloidal particles of two sizes have been co-deposited from mixed suspensions by vertical transfer to prepare binary colloidal crystals (bCC) and inverse opals (IO) with long-range ordering, as deduced from structural characterization by SEM and Vis-NIR spectroscopy. As such, the described procedure allows hierarchical structure formation with colloidal particle mixtures by vertical lifting deposition in a single step. The particular features of the lattice geometries in these binary structures was theoretically analyzed. From the obtained silica IO templates, gold-silica hybrid IOs and gold opal replicas with hierarchical pore structures were fabricated. The gold-silica hybrid IOs showed in their Vis-NIR spectra a plasmonic response upon refractive index changes of the surrounding medium, which may be exploited for chemo- and biosensing applications.