Lifetime and linewidth of individual quantum dots interfaced with graphene
Abstract
Here, we report on luminescence lifetimes and linewidths from an array of individual quantum dots (QDs) that were either interfaced with graphene surface guides or dispersed on aluminum electrodes. The observed fluorescence quenching is consistent with screening by charge carriers. Fluorescence quenching is typically mentioned as a sign that chromophores are interfacing with a conductive surface (metal or graphene); we find that the QDs interfaced with the metal film exhibit shortened lifetime 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 angle-dependent lifetime measurements, which we postulate depend on the specifics of the local density-of-states involved.
- Authors:
-
- New Jersey Institute of Technology (NJIT), Newark, NJ (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- Argonne National Laboratory, Center for Nanoscale Materials; USDOE Office of Science (SC)
- OSTI Identifier:
- 1461497
- Alternate Identifier(s):
- OSTI ID: 1434133
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanoscale
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 15; Journal ID: ISSN 2040-3364
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Miao, Xin, Gosztola, David J., Sumant, Anirudha V., and Grebel, Haim. Lifetime and linewidth of individual quantum dots interfaced with graphene. United States: N. p., 2018.
Web. doi:10.1039/c8nr01769g.
Miao, Xin, Gosztola, David J., Sumant, Anirudha V., & Grebel, Haim. Lifetime and linewidth of individual quantum dots interfaced with graphene. United States. https://doi.org/10.1039/c8nr01769g
Miao, Xin, Gosztola, David J., Sumant, Anirudha V., and Grebel, Haim. Mon .
"Lifetime and linewidth of individual quantum dots interfaced with graphene". United States. https://doi.org/10.1039/c8nr01769g. https://www.osti.gov/servlets/purl/1461497.
@article{osti_1461497,
title = {Lifetime and linewidth of individual quantum dots interfaced with graphene},
author = {Miao, Xin and Gosztola, David J. and Sumant, Anirudha V. and Grebel, Haim},
abstractNote = {Here, we report on luminescence lifetimes and linewidths from an array of individual quantum dots (QDs) that were either interfaced with graphene surface guides or dispersed on aluminum electrodes. The observed fluorescence quenching is consistent with screening by charge carriers. Fluorescence quenching is typically mentioned as a sign that chromophores are interfacing with a conductive surface (metal or graphene); we find that the QDs interfaced with the metal film exhibit shortened lifetime 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 angle-dependent lifetime measurements, which we postulate depend on the specifics of the local density-of-states involved.},
doi = {10.1039/c8nr01769g},
journal = {Nanoscale},
number = 15,
volume = 10,
place = {United States},
year = {Mon Mar 12 00:00:00 EDT 2018},
month = {Mon Mar 12 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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