skip to main content

SciTech ConnectSciTech Connect

Title: Charge transfer in graphene oxide-dye system for photonic applications

The fluorescence of a standard dye Rhodamine 6G (R6G) in solution decreases on addition of reduced graphene oxide (rGO). The absorption spectra and lifetime measurements confirm that no excited-state but a ground-state complex formation is responsible for this effect. For silver decorated rGO (Ag-rGO), the quenching efficiency and ground state complex formation process is small. Z-scan measurements have been done to study the optical nonlinearity at 532 nm under ps time scale. Remarkable reduction in the saturable absorption (SA) effect of R6G indicates no nonlinear contribution from the ground state complex. The results have been explained with varying charge transfer rates and non-fluorescence nature of the complex.
Authors:
;  [1] ; ;  [2]
  1. Department of Physics, Indian Institute of Technology Madras, Chennai, 600036 (India)
  2. EIIRIS, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku, Toyohashi 441-8580 (Japan)
Publication Date:
OSTI Identifier:
22266048
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1585; Journal Issue: 1; Conference: IRAGO conference 2013, Aichi (Japan), 24-25 Oct 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ABSORPTION SPECTRA; EFFICIENCY; EXCITED STATES; FLUORESCENCE; GRAPHENE; GROUND STATES; OXIDES; QUENCHING; SILVER