Abstract：The optical properties of single layer graphene oxide (GO) aqueous dispersion were studied in this paper.
The relations of concentration and excitation wavelength to optical spectra were discussed. The results show
that there is a wide absorption peak in the range of 360-500 nm and a sharp absorption peak centered at 360 nm for
the higher concentration samples, and there have absorption peaks at 230 nm and 300 nm for the lower concentration
samples. Under 365 nm excitation, the emission peak position changes from 560-600 nm to blue emission with
the concentration decrease. For 0.4 mg/ml sample, the emission peak position is not affected by the excitation
wavelength obviously, but the emission intensity changes obviously and the emission peak is very broad. For
0.02 mg/ml sample, emission peak is fairly sensitive to excitation wavelength, for this, graphene oxide will be of
great potential applications in tunable photoelectric areas.
2022, Vol. 32 
