Partnership between NMHU and OSU in Electronic, Optical and Magnetic Materials; DMR-1523611 One step synthesis of fluorescent graphene quantum dots through.

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Partnership between NMHU and OSU in Electronic, Optical and Magnetic Materials; DMR-1523611 One step synthesis of fluorescent graphene quantum dots through pyrolysis of amino acids 2017 Outcome: We have developed a novel method for the synthesis of graphene quantum dots (GQDs) by using two amino acids, which are non-toxic natural materials containing nitrogen groups for easy surface modification. The synthesis process was easy, efficient and no toxic chemicals were involved. The obtained GQDs had a size of 3.26± 1.30 nm and lattice spacing of 0.286 nm. Impact: These GQDs emitted strong blue fluorescence, demonstrated high photostability and showed tunable emission wavelength by changing the excitation wavelength, which have great potentials in biomedical imaging, designs of biosensors, and etc. Moreover, they had good solubility not only in water, but also in many organic solvents, which may future broaden their applicability. Dissolved in different solvents did not affect their fluorescence emission ability. Explanation: The study of the mechanism of fluorescence property is currently in progress. It could be related to quantum confinement effect or the defective state emission. Jiao Chen, New Mexico Highlands University a) Schematic illustration of the synthesis of GQDs; b) TEM (inset: HRTEM) image of GQDs and c) their size distribution; d) Fluorescence emission spectra of GQDs obtained with excitation wavelength progressively being increased from 340 to 520 nm; e) Photo of water (a) and GQDs (b) under a UV light of 365 nm.

NMHU students taking a tour of the OSU facilities Outreach activities at New Mexico Highlands and Ohio State Universities Partnership between NMHU and OSU in Electronic, Optical and Magnetic Materials; DMR-1523611 Collaborative activities of NMHU and OSU students PI Prof. Tatiana Timofeeva, PhD New Mexico Highlands University Graduate student Bianca Valencia talks with a committee member at the NSF Site Visit Dr. Gil Gallegos with his research group and one of the committee members at the NSF Site Visit Students participate in the poster session during the Physics of Emergent Materials Workshop at OSU NMHU students taking a tour of the OSU facilities