The Origin of Fluorescence from Graphene Oxide
Nanyang Technological University · Nanjing University of Posts and Telecommunications · +1 more institution
Abstract
Time-resolved fluorescence measurements of graphene oxide in water show multiexponential decay kinetics ranging from 1 ps to 2 ns. Electron-hole recombination from the bottom of the conduction band and nearby localized states to wide-range valance band is suggested as origin of the fluorescence. Excitation wavelength dependence of the fluorescence was caused by relative intensity changes of few emission species. By introducing the molecular orbital concept, the dominant fluorescence was found to originate from the electronic transitions among/between the non-oxidized carbon regions and the boundary of oxidized carbon atom regions, where all three kinds of functionalized groups C-O, C = O and O = C-OH were…
Citation impact
- FWCI
- 22.95
- Percentile
- 100%
- References
- 60
Authors
6- JSJingzhi ShangCorresponding
Nanyang Technological University
- LMLin Ma
Nanyang Technological University
- JLJiewei Li
Nanjing University of Posts and Telecommunications, Nanyang Technological University
- WAWei Ai
Nanyang Technological University, Nanjing University of Posts and Telecommunications
- TYTing Yu
Nanyang Technological University, National University of Singapore
Topics & keywords
- Graphene
- Fluorescence
- Oxide
- Materials science
- Photochemistry
- Excitation
- Chemical physics
- Carbon fibers
- Clean water and sanitation