Life-time and line-width of individual quantum dots interfaced with graphene
Abstract
We report on the luminescence's life-time and line-width from an array of individual quantum dots; these were interfaced with graphene surface guides or dispersed on a metal film. Our results are consistent with screening by charge carriers. Fluorescence quenching is typically mentioned as a sign that chromophores are interfacing a conductive surface; we found that QD interfaced with conductive layers exhibited shorter life-time and line-broadening but not necessarily fluorescence quenching as the latter may be impacted by molecular concentration, reflectivity and conductor imperfections. We also comment on selective life-time measurements, which, we postulate depend on the specifics of the local density-of-states involved.
Cite
@article{arxiv.1712.09398,
title = {Life-time and line-width of individual quantum dots interfaced with graphene},
author = {Xin Miao and David J. Gosztola and Anirudha V. Sumant and Haim Grebel},
journal= {arXiv preprint arXiv:1712.09398},
year = {2017}
}
Comments
15 pgs, 6 figures