Facile synthesis of graphene quantum dots and their optical characterization
Kawaljeet Singh Samra, Manpreet, Amandeep Singh
Abstract
Graphene quantum dots (GDQs) were synthesized from citric acid (CA) and coke (C), by using a bottom up and a top-down approach, respectively. The synthesized GQDs were characterized using FTIR, UV-visible, Raman and photo-luminescence (PL) spectroscopies. Substantial variation in their optical emission behavior was observed. All emission spectra of GQDs extracted from CA, were centered at 460 nm, but a red shift was observed with the increase of excitation wavelength, in the emission curves of C-GQDs. So, in this work the comparison of optical behavior of GQDs derived from citric acid and coke has been done and relevant discussion is reported.
Topics & Concepts
GrapheneQuantum dotRaman spectroscopyCitric acidLuminescenceMaterials scienceFourier transform infrared spectroscopyPhotochemistryAnalytical Chemistry (journal)NanotechnologyOptoelectronicsChemistryOpticsOrganic chemistryPhysicsCarbon and Quantum Dots ApplicationsNanocluster Synthesis and ApplicationsQuantum Dots Synthesis And Properties