A selective sensor for cyanide ion(CN^-) based on the inner filter effect of metal nanoparticles with photoluminescent carbon dots as the fluorophore  

荧光碳量子点与贵金属纳米颗粒复合体系构建氰根离子选择性传感器（英文）

作　　者：张嘉 董良 俞书宏 

机构地区：[1]Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology,Department of Chemistry, University of Science and Technology of China [2]Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences

出　　处：《Science Bulletin》2015年第8期785-791,M0004,共8页科学通报（英文版）

基　　金：the funding support from the National Basic Research Program of China(2014CB931800,2013CB933900);the National Natural Science Foundation of China(21407140,21431006,91022032,91227103);J.Zhang is grateful for the China Postdoctoral Science Foundation(2013M531515);the Fundamental Research Funds for the Central Universities(WK2060190036)

摘　　要：Herein, we report a plasmonic metal nanoparti- cle-involved sensor for cyanide ion based on the inner filter effect by using photoluminescent carbon dots as the signal reporter. With commercial bee pollen as the carbon resource, we synthesized photoluminescent nitrogen-doped carbon dots by a one-pot hydrothermal process, and their fluores- cence quantum yield reached as high as 10.2 % ± 0.5 %. Fluorescence measurements indicated that the fluorescence of the carbon dots was insusceptible to the presence of many environmentally ordinary ions. Thanks to this “inert” property, we then developed a turn-on fluorescent sensor for cyanide ion in an inner filter effect manner by using carbon dots as the fluorophore and gold or silver nanoparticle as the light absorber. This detection technique is expected to be used for other metal nanoparticles-carbon dots ensemble fluorescent assays.以商业蜂花粉为碳源,通过一步水热法制备出氮掺杂的荧光碳量子点作为荧光试剂,并选取金和银纳米颗粒作为光吸收剂,发展了一种基于纳米颗粒内过滤效应以检测氰根离子的荧光方法.金和银纳米颗粒的吸收光谱与碳量子点的激发和发射光谱重叠,满足内过滤效应条件.由于内过滤效应,纳米颗粒可显著猝灭碳量子点的荧光;而当引入氰根离子后,纳米颗粒在氰根离子作用下消蚀变小,对光的吸收变弱,使得碳量子点的荧光逐渐变强,从而实现对氰根离子的选择性检测.

关 键 词：Carbon dots Biomass CYANIDE Innerfilter effect Metal nanoparticles 

分 类 号：O657.3[理学—分析化学] TP212[理学—化学]