溶剂热法制备的二硫化钼量子点在多巴胺荧光检测中的应用（英文）  

Facile Solvothermal Fabrication of MoS2 Quantum Dots for Highly Fluorescence Detection of Dopamine

作　　者：吴静燕 何大伟[1] 王永生[1] 胡音 付晨 赵宣 张璐[1] 李雪 WU Jing-yan;HE Da-wei;WANG Yong-sheng;HU Yin;FU Chen;ZHAO Xuan;ZHANG Lu;LI Xue(School of Science,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学理学院

出　　处：《发光学报》2019年第10期1207-1214,共8页Chinese Journal of Luminescence

基　　金：Supported by National Key R&D Program of China(2016YFA0202302);National Natural Science Foundation of China(NSFC)(61527817,61875236,61905010,61975007)~~

摘　　要：二硫化钼量子点作为过渡金属硫化物的典型代表,因其独特的光学性质和巨大的应用潜力而备受关注。本文以二硫化钼粉末状晶体为原料,采用溶剂热方法处理得到二硫化钼量子点。在一定的激发条件下,二硫化钼量子点具有很强的荧光特性,可以将其作为荧光探针去检测多巴胺。结果表明,制备的二硫化钼量子点平均尺寸大小约为3 nm,具有很强的荧光特性,荧光量子效率高达57.55%。当多巴胺浓度从0.02μmol/L变为1 000μmol/L时,二硫化钼量子点传感系统会呈现出线性相关的荧光猝灭,且检测限为0.32μmol/L,灵敏度极高。在不同pH值环境和干扰物存在下,二硫化钼量子点传感系统检测多巴胺具有强稳定性和高选择性。二硫化钼量子点因纯度高、尺寸小、荧光强度高等特性在催化、光学成像、显示器件和荧光传感等方面具有潜在的应用前景。Molybdenum disulfide quantum dots(MoS 2 QDs),as a typical representative of transition metal dichalcogenides(TMDs),had attracted much attention due to the unique optical properties and huge potential applications.In this paper,MoS 2 QDs were fabricated through a facile solvothermal method from MoS 2 powder crystals.Under certain excitation conditions,MoS 2 QDs had strong fluorescence properties and were used as fluorescence probes to detect dopamine(DA).The results showed that the average size of the as-prepared MoS 2 QDs was about 3 nm,and the fluorescence quantum efficiency was as high as 57.55%.When the concentration of DA changed from 0.02 to 1 000μmol/L,the fluorescence of the sensing system was quenched with a linear dependence and the limit of detection was 0.32μmol/L,with extremely high sensitivity.MoS 2 QDs sensing system has strong stability and high selectivity for dopamine detection in different pH values and the presence of interferences.MoS 2 QDs had potential applications in catalytic reactions,optical imaging,display devices and fluorescence sensing due to the high purity,small size and high fluorescence intensity.

关 键 词：二硫化钼量子点 溶剂热法 荧光 多巴胺检测 

分 类 号：O482.31[理学—固体物理]