%0 Journal Article
	%A Chi Man Luk and  Ming Kiu Tsang and  Chi Fan Chan and  Shu Ping Lau
	%D 2014
	%J International Journal of Nuclear and Quantum Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 96, 2014
	%T Two-Photon Fluorescence in N-Doped Graphene Quantum Dots
	%U https://publications.waset.org/pdf/10000013
	%V 96
	%X Nitrogen-doped graphene quantum dots (N-GQDs)
were fabricated by microwave-assisted hydrothermal technique. The
optical properties of the N-GQDs were studied. The luminescence of
the N-GQDs can be tuned by varying the excitation wavelength.
Furthermore, two-photon luminescence of the N-GQDs excited by
near-infrared laser can be obtained. It is shown that N-doping play a
key role on two-photon luminescence. The N-GQDs are expected to
find application in biological applications including bioimaging and
sensing.

	%P 1387 - 1390