中国光学, 2016, 9 (5): 569, 网络出版: 2016-10-19
Fe3+对石墨烯氧化物荧光淬灭机理的研究
Fluorescence quenching mechanism of graphene oxide by Fe3+
石墨烯氧化物 静态荧光淬灭 瞬态吸收 动力学衰减 graphene oxide static fluorescence quenching transient absorption dynamic decay
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Fe3+(浓度为05、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Fe3+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Fe3+的GO其动力学衰减曲线基本没有任何变化。结果表明,Fe3+对石墨烯氧化物的荧光淬灭主要是静态的荧光淬灭过程。
Abstract
The graphene oxide(GO) is synthesized by the improved Hummer method. The fluorescence quenching mechanism of graphene oxide by Fe3+(05, 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 Fe3+ 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 Fe3+ concentrations. It is proved that the fluorescence quenching mechanism of GO by Fe3+ is mainly ascribed to the static fluorescence quenching.
李正顺, 王岩, 王雷, 王海宇. Fe3+对石墨烯氧化物荧光淬灭机理的研究[J]. 中国光学, 2016, 9(5): 569. LI Zheng-shun, WANG Yan, WANG Lei, WANG Hai-yu. Fluorescence quenching mechanism of graphene oxide by Fe3+[J]. Chinese Optics, 2016, 9(5): 569.