摘要
与一般有机染料分子相比,半导体材料量子点具有优异的光学性能,在多个领域得到了广泛的应用。量子点具有窄而对称且可调的发射波长、宽激发强吸收、抗光漂白能力强以及水溶性好等诸多优势,引起了研究者广泛关注。为了增加量子点的斯托克斯位移从而很好地避免量子点的自猝灭现象,引入掺杂物是一种很有效的方式。掺杂量子点不仅保留了量子点原有的优点,而且还赋予量子点额外的优异性能。如Mn掺杂ZnS量子点生物相容性好,不含Cd和Hg等有害元素,而且Mn^(2)+的加入使其具有优异的室温磷光特性。磷光检测能很好地避开生物背景荧光的干扰,使得Mn掺杂ZnS量子点能够广泛应用于磷光生物分析。本文综述了Mn掺杂ZnS量子点在室温磷光分析中的研究进展,着重介绍了几种具有启发意义的设计策略,包括其发光机理以及应用于离子、分子以及生物大分子等的检测。
In comparison with traditional organic dyes,semiconductor quantum dots( QDs) feature a series of superior luminescence properties,including narrow and symmetric emission,broad excitation and strong absorption,excellent photobleaching-resistance,and good water solubility. The addition of dopants can endows QDs with extra new properties,e. g.,further increase the Stokes shift for avoiding self-quenching. Mn-doped Zn S QDs are a very representative example of doped QDs. No harmful elements such as Cd and Hg are involved in such type of bio-friendly QDs. Besides,the Mn^(2+) dopant further adds QDs with excellent room temperature phosphorescence. Phosphorescent detection can effectively eliminate the interference of biological background fluorescence,thus Mn-doped Zn S QDs can be widely used in phosphorescent bioanalysis. In this paper,the recent progress of room temperature phosphorescence analysis with Mn-doped Zn S QDs was reviewed. The emphasis was placed on the several stimulative sensing design strategies, including the luminescence mechanism,ion probes,detection of small molecules and biomacromolecules.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2017年第12期1831-1837,共7页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金项目(No.21522505)资助~~
关键词
Mn掺杂ZnS量子点
室温磷光
传感
评述
Manganese-doped zinc sulfide quantum dots
Room temperature phosphorescence
Sensing
Review
