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首页 ￤ 文章列表 ￤ 2019 ￤ Confined Growth of Quantum Dots in Silica Spheres by Ion Exchange of “Trapped NH4+” for White-Light Emission
Confined Growth of Quantum Dots in Silica Spheres by Ion Exchange of “Trapped NH4+” for White-Light Emission
来源: | 作者:prod66c7b | 发布时间: 2019-12-19 | 4501 次浏览 | 分享到:
Xing M, Chen B, Feng J, et al. Confined Growth of Quantum Dots in Silica Spheres by Ion Exchange of “Trapped NH4+” for White-Light Emission[J]. Chem, 2019, 5(8): 2195-2214.



Great interest has recently emerged in the development of quantum dots (QDs) that are capable of direct white-light emission for solid-state lighting. The conventional synthesis routes often involve surface modification and ligand displacement, which usually lead to undesired QD aggregation and fluorescence quenching. Here, we report a new strategy to synthesize QDs (ZnS, CdS, CdTe, and CsPbBrxI3-x) directly in colloidal SiO2to produce QDs@SiO2composites, displaying direct white-light emissions. By taking advantage of the NH4+trapped inside the silica colloids, we introduce metal cations through ion-exchange reactions into the microporous network of silica and then produce QDs directly within the silica colloids. This “trapped-NH4+” strategy represents a new platform for the synthesis of novel functional nanocomposites by allowing convenient incorporation of various nanoparticles into sol-gel-derived colloidal matrices.