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Preparation and Luminescent Properties of Controllable Graphene Quantum Dot

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In contribution to the high interests and concerns in regards to QDs, their properties and applications, this paper presents highly photoluminescent Graphene quantum dots (GQDs) which have been prepared via a simple one-step method. They were characterized by X-ray powder diffraction (XRD), photoluminescence (PL); UV-vis diffused reflectance spectra (UV), transmission electron microscope (TEM) and scanning electron microscopy (SEM). The particle size of GQDs can be easily controlled, and these types of GQDs have tunable particle size with the average diameter of 5–7 nm. These GQDs show strong and stable photoluminescence which is dependent on excitation wavelength. It is to be noted that the GQDs can efficiently be taken up by liver cancer cells HepG2. Additionally, due to its high photostability and biocompatibility, the obtained carbon dots are demonstrated as excellent probes in cellular imaging.
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Keywords: BIOLABELING; GRAPHENE QUANTUM DOTS; PHOTOLUMINESCENT

Document Type: Short Communication

Publication date: March 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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