摘要
本文采用Mn^2＋掺杂和组装壳等技术,以变性牛血清白蛋白（d BSA）为稳定剂,探索水相合成新型掺杂-核壳结构Ag In S2：Mn@Zn S量子点的方法。工作中以产物的荧光和磷光强度为指标,通过考察Mn^2＋和Zn的用量、反应的气氛、p H值、温度和时间来优化Ag In S2：Mn@Zn S量子点的合成条件。用扫描隧道显微镜、X射线粉末衍射等技术对量子点的形貌、结构进行了表征。结果表明,该量子点的直径为9^11nm,量子产率为43.2%。用荧光光谱等方法研究了其光致发光性能,并应用于对胰蛋白酶的选择性识别。
A novel water- soluble,Mn- doped and core- shell structure Ag In S2： Mn @ Zn S quantum dots（ Ag In S2： Mn@ Zn S QDs） was synthesized by hydrothermal methods. The synthesis of Ag In S2： Mn @ Zn S QDs includes the formation of Mn- doped Ag In S2 core with denatured bovine serum albumin（ d BSA） as the stabilizer and the coating of Zn S on the surface of the core. The effects of Mn2 ＋ratio,time and atmosphere,p H value and the core- shell ratio on the fluorescence and phosphorescence of Ag In S2： Mn@ Zn S QDs were respectively investigated.The characterizations of Ag In S2： Mn@ Zn S QDs were studied via scanning tunneling microscopy（ STM）,X- ray diffraction pattern（ XRD）,respectively. The performances are studied using ultraviolet- visible spectrometry and spectrofluorimetry. The results show that the size range of the resultant nano- particles is 9- 11 nm,and the quantum yield is determined to be 43. 2%. The QDs can selectively recognize typsin.
出处
《嘉应学院学报》
2016年第2期59-64,共6页
Journal of Jiaying University
基金
湖北省自然科学基金(2010CDA061)
广东省创新强校项目(314B0143)资助
