Studies of the interaction of CS@ZnS:Mn with bovine serum albumin under illumination

文献类型： 外文期刊

第一作者： Liu, Li

作者： Liu, Li;Xiao, Ling

作者机构：

关键词： Doped semiconductor nanocrystals;Chitosan;Bovine serum albumin;Interaction;UV illumination

期刊名称：APPLIED SURFACE SCIENCE （ 影响因子：6.707； 五年影响因子：5.905 ）

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年卷期：

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收录情况： SCI

摘要： In this study, chitosan coated Mn-doped ZnS quantum dots (CS@ZnS:Mn D-dots) were obtained in aqueous media under ambient pressure. The interaction and illumination damages of CS@ZnS:Mn D-dots with bovine serum albumin (BSA) were studied by means of ultraviolet-visible (UV-vis) and fluorescence (FL) spectra. It was found that the FL of BSA was quenched by CS@ZnS:Mn D-dots. The dominating quenching mechanism of CS@ZnS:Mn D-dots with BSA belongs to dynamic quenching. Hydrophobic interaction plays a major role in the CS@ZnS:Mn-BSA interaction; binding processes are spontaneous. Influencing factors such as illumination time and CS@ZnS:Mn D-dots concentrations were considered. The FL quenching effect of BSA by CS@ZnS:Mn D-dots is enhanced with the increase of illumination time and CS@ZnS:Mn D-dots concentration. The FL enhancement of CS@ZnS:Mn D-dots by BSA under UV illumination was also observed. It was proved that, the interaction of CS@ZnS:Mn D-dots with BSA under UV illumination is mainly a result of a photo-induced free radical procedure. CS@ZnS:Mn D-dots may be used as photosensitizers in photodynamic therapy. (C) 2015 Elsevier B.V. All rights reserved.

分类号： O59

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