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Excitation wavelength dependent fluorescence of graphene oxide controlled by strain
Cushing, Scott K.1,2; Ding, Weiqiang3; Chen, Gang4; Wang, Chao5; Yang, Feng3; Huang, Fuqiang5; Wu, Nianqiang1
2017
发表期刊Nanoscale
ISSN20403364
卷号9期号:6页码:2240-2245
摘要Unlike conventional fluorophores, the fluorescence emission of graphene oxide (GO) sheets can shift hundreds of nanometers as the excitation wavelength increases. The excitation wavelength dependent fluorescence is referred to as a giant red-edge effect and originates in a local reorganization potential slowing down the solvation dynamics of the excited state to the same time scale as the fluorescence lifetime. The present work has discovered that out-of-plane strain in the graphene oxide sheet leads to the intra-layer interaction necessary to slow down the solvation time scale. The oxygen percentage, dopant percentage, disorder, and strain are correlated with the presence and extent of the red-edge effect in oxygen, boron, nitrogen, and fluorine doped graphene oxide. Of these commonly cited possibilities, only out-of-plane strain is directly correlated to the red-edge effect. Furthermore, it is shown that the extent of the red-edge effect, or how far the emission wavelength can shift with increasing excitation wavelength, can be tuned by the electronegativity of the dopant. The present work interprets why the giant red-edge effect is present in some GO sheets but not in other GO sheets. © The Royal Society of Chemistry.
DOI10.1039/c6nr08286f
EI入藏号20170703349609
EI主题词Graphene
EI分类号741.1 Light/Optics - 801.4 Physical Chemistry - 801.4.1 Electrochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 931.3 Atomic and Molecular Physics - 951 Materials Science
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文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25577
专题中国科学院上海硅酸盐研究所
作者单位1.Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown; WV; 26506-6106, United States;
2.Department of Physics and Astronomy, West Virginia University, Morgantown; WV; 26506-6315, United States;
3.Department of Industrial and Management Systems Engineering, West Virginia University, Morgantown; WV; 26506-6070, United States;
4.Department of Physics and Astronomy, Ohio University, Athens; OH 45701, United States;
5.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China
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Cushing, Scott K.,Ding, Weiqiang,Chen, Gang,et al. Excitation wavelength dependent fluorescence of graphene oxide controlled by strain[J]. Nanoscale,2017,9(6):2240-2245.
APA Cushing, Scott K..,Ding, Weiqiang.,Chen, Gang.,Wang, Chao.,Yang, Feng.,...&Wu, Nianqiang.(2017).Excitation wavelength dependent fluorescence of graphene oxide controlled by strain.Nanoscale,9(6),2240-2245.
MLA Cushing, Scott K.,et al."Excitation wavelength dependent fluorescence of graphene oxide controlled by strain".Nanoscale 9.6(2017):2240-2245.
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