Photosensitive polystyrene/silver bromide hybrid colloidal crystals as recoverable colorimetric naked eye probes for bromine gas sensing
Photosensitive polystyrene/silver bromide hybrid colloidal crystals as recoverable colorimetric naked eye probes for bromine gas sensing
复制标题
光敏聚苯乙烯/溴化银杂化胶体晶体作为可恢复比色裸眼探针用于溴气体传感
DOI：
10.1039/c5tc02616d
复制
发表时间：
2016-01-01
影响因子：
6.4
通讯作者：
Yang, Di
中科院分区：
文献类型：
--
作者：
Yu, Bing;Zhai, Feng;Yang, Di
采用共沉积法制备了光敏聚苯乙烯（PS）/银（AgBr）杂化胶体晶体。经紫外光处理后，渗入的AgBr分解为银纳米粒子（Ag-NPs），得到结构色增强的PS/Ag-NP杂化胶体晶体。增强的结构色是由于非相干散射光的吸收和嵌入的银纳米粒子的颜色饱和度的增加。用紫外-可见反射光谱仪测量了PS胶体晶体、PS/AgBr和PS/Ag-NP杂化胶体晶体的带隙，并根据布拉格定律计算了带隙。所得PS/Ag-NP杂化胶体晶体可用作溴（Br）气体传感的可回收比色裸眼探针，在50 s的传感时间下检测限为15 mmol L−1。该传感器经多次溴敏试验后性能稳定可靠，成本低廉，易于批量生产。
Photosensitive polystyrene (PS)/silver bromide (AgBr) hybrid colloidal crystals were prepared using a co-deposition method. After treatment with UV light, the infiltrated AgBr decomposed to silver nanoparticles (Ag-NPs), and PS/Ag-NP hybrid colloidal crystals with enhanced structural colours were obtained. The enhanced structural colors are due to the absorption of incoherent scattering light and increase in color saturation by the embedded Ag-NPs. The band gaps of the PS colloidal crystals, and PS/AgBr and PS/Ag-NP hybrid colloidal crystals were measured using a UV-vis reflection spectrometer and calculated using Bragg law. The obtained PS/Ag-NP hybrid colloidal crystals could be used as recoverable colorimetric naked eye probes for bromine (Br) gas sensing with a detection limit of 15 mmol L−1 at a sensing time of 50 s. The sensor had a very reliable performance after repeated bromine sensing, and could be mass produced facilely with very low cost.