Fe^(3+)对石墨烯氧化物荧光淬灭机理的研究  

Fluorescence quenching mechanism of graphene oxide by Fe^(3+)

作　　者：李正顺[1] 王岩[1] 王雷[1] 王海宇[1] LI Zheng-shun WANG Yan WANG Lei WANG Hai-yu(College of Electronic Science and Engineering, Jilin University, Changchun 130012, China)

机构地区：[1]吉林大学电子科学与工程学院,吉林长春130012

出　　处：《中国光学》2016年第5期569-578,共10页Chinese Optics

基　　金：国家自然科学基金资助项目(No.21473077)~~

摘　　要：采用改进的Humer法合成了石墨烯氧化物,利用搭建的时间分辨光谱探测系统详细探究了Fe^(3+)(浓度为0.5、1、2 mmol/L)对石墨烯氧化物荧光淬灭物理机制。稳态荧光发射光谱中,随着Fe^(3+)浓度的增加,石墨烯氧化物的荧光强度急剧减弱。时间分辨荧光光谱和飞秒瞬态吸收光谱研究证实,加入不同浓度Fe^(3+)的GO其动力学衰减曲线基本没有任何变化。结果表明,Fe^(3+)对石墨烯氧化物的荧光淬灭主要是静态的荧光淬灭过程。The graphene oxide（ GO） is synthesized by the improved Hummer method. The fluorescence quenching mechanism of graphene oxide by Fe^3＋（ 0. 5,1,2 mmol/L） in detail is studied using the time-resolved spectrometry probe system. From the steady photoluminescence emitting spectra,the fluorescence intensity of GO decreased dramatically as the Fe^3＋ concentration increased. From the time-resolved fluorescence spectra and femtosecond transient absorption spectra,the dynamic decay curves have no extinctive changes for GO with different Fe^3＋ concentrations. It is proved that the fluorescence quenching mechanism of GO by Fe^3＋ is mainly ascribed to the static fluorescence quenching.

关 键 词：石墨烯氧化物 静态荧光淬灭 瞬态吸收 动力学衰减 

分 类 号：TN249[电子电信—物理电子学]