In Situ "Doping" Inverse Silica Opals with Size-Controllable Gold Nanoparticles for Refractive Index Sensing
In Situ "Doping" Inverse Silica Opals with Size-Controllable Gold Nanoparticles for Refractive Index Sensing
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DOI：
10.1021/jp4024298
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发表时间：
2013-05-09
影响因子：
3.7
通讯作者：
Teng, Jinghua
中科院分区：
文献类型：
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作者：
Cai, Zhongyu;Liu, Yan Jun;Teng, Jinghua
我们报道了用金（i-Au-SiO2-o）纳米颗粒（NPs）通过共自组装的方法制备逆SiO2蛋白石，并结合随后通过煅烧去除聚苯乙烯胶体球。所得的i-Au-SiO2-o薄膜显示出无配体Au NPs均匀分布的长程有序。通过改变煅烧温度，可以在6 ~ 30转范围内调节金纳米粒子的尺寸。制备的i-Au-SiO2-o薄膜同时保留了局域表面等离子体共振（LSPR）和Bragg衍射峰。LSPR和Bragg衍射峰对周围介质的折射率变化都很敏感，这是传感应用的一个重要特征。该方法提供了一种简单而通用的方法来制造高质量的金NP“掺杂”光子晶体，用于传感和其他应用。
We report the fabrication of inverse SiO2 opals "doped" with gold (i-Au-SiO2-o) nanoparticles (NPs) via a co-self-assembly method combined with subsequent removal of polystyrene colloidal spheres by calcination. The resulting i-Au-SiO2-o films demonstrate long-range ordering with uniform distribution of ligand-free Au NPs. The size of Au NPs can be tuned from 6 to 30 tun by varying the calcination temperature. The as-prepared i-Au-SiO2-o films preserve both localized surface plasmon resonance (LSPR) and Bragg diffraction peaks simultaneously. Both LSPR and Bragg diffraction peaks are sensitive to the refractive index changes of the surrounding medium-an important feature for sensing applications. The method provides a facile and versatile way to fabricate high-quality Au NP "doped" photonic crystals for applications in sensing and others.