Abstract
Recently, we have reported theoretical studies on the rate of energy transfer from an electronically excited molecule to graphene. It was found that graphene is a very efficient quencher of the electronically excited states and that the rate ∝ z − 4. The process was found to be effective up to 30 nm which is well beyond the traditional FRET limit. In this report, we study the transfer of an amount of energy \(\hbar \Omega\) from a dye molecule to doped graphene. We find a crossover of the distance dependence of the rate from z − 4 to exponential as the Fermi level is increasingly shifted into the conduction band, with the crossover occurring at a shift of the Fermi level by an amount \(\hbar \Omega/2\).
We had reported earlier that graphene is a very efficient quencher of the electronically excited states with the rate proportional to (distance)-4. In this paper, we predict a crossover of the distance dependence of the rate from power law to exponential as the Fermi level is increasingly shifted into the conduction band.
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#Dedicated to Prof. N Sathyamurthy on his 60th birthday
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SWATHI, R.S., SEBASTIAN, K.L. Excitation energy transfer from dye molecules to doped graphene# . J Chem Sci 124, 233–240 (2012). https://doi.org/10.1007/s12039-012-0221-9
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DOI: https://doi.org/10.1007/s12039-012-0221-9