Interaction of graphene quantum dots with bulk semiconductor surfaces

Journal Article · Fri May 15 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4915443· OSTI ID:22391757

Mohapatra, P. K.; Kushavah, Dushyant; Mohapatra, J. ^[1]

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1. Centre for Research in Nanotechnology and Science, IIT Bombay-400076, Mumbai (India)

Highly luminescent graphene quantum dots (GQDs) are synthesized through thermolysis of glucose. The average lateral size of the synthesized GQDs is found to be ∼5 nm. The occurrence of D and G band at 1345 and 1580 cm{sup −1} in Raman spectrum confirms the presence of graphene layers. GQDs are mostly consisting of 3 to 4 graphene layers as confirmed from the AFM measurements. Photoluminescence (PL) measurement shows a distinct broadening of the spectrum when GQDs are on the semiconducting bulk surface compared to GQDs in water. The time resolved PL measurement shows a significant shortening in PL lifetime due to the substrate interaction on GQDs compared to the GQDs in solution phase.

• OSTI ID: 22391757
• Journal Information: AIP Conference Proceedings, Vol. 1661, Issue 1; Conference: ICCMP 2014: International Conference on Condensed Matter Physics 2014, Shimla (India), 4-6 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
ATOMIC FORCE MICROSCOPY
COMPARATIVE EVALUATIONS
GLUCOSE
GRAPHENE
LAYERS
LIFETIME
PHOTOLUMINESCENCE
QUANTUM DOTS
RAMAN SPECTRA
SEMICONDUCTOR MATERIALS
SUBSTRATES
SURFACES
TIME RESOLUTION
WATER