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Title: Mapping Emission from Clusters of CdSe/ZnS Nanoparticles

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2];  [2];  [3];  [1]; ORCiD logo [3]
  1. Colorado State Univ., Fort Collins, CO (United States). Dept. of Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Colorado State Univ., Fort Collins, CO (United States). Dept. of Chemistry

In this paper, we have carried out correlated super-resolution and SEM imaging studies of clusters of CdSe/ZnS nanoparticles containing up to ten particles to explore how the fluorescence behavior of these clusters depends on the number of particles, the specific cluster geometry, the shell thickness, and the technique used to produce the clusters. The total emission yield was less than proportional to the number of particles in the clusters for both thick and thin shells. With super-resolution imaging, the emission center of the cluster could be spatially resolved at distance scales on the order of the cluster size. The intrinsic fluorescence intermittency of the nanoparticles altered the emission distribution across the cluster, which enabled the identification of relative emission intensities of individual particles or small groups of particles within the cluster. Finally, for clusters undergoing interparticle energy transfer, donor/acceptor pairs and regions where energy was funneled could be identified.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
Grant/Contract Number:
AC52-06NA25396; MPS/CHE-1059089
OSTI ID:
1440447
Report Number(s):
LA-UR-18-20821
Journal Information:
Journal of Physical Chemistry. C, Vol. 122, Issue 7; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Cited By (1)

Super-resolution photoluminescence lifetime and intensity mapping of interacting CdSe/CdS quantum dots journal January 2020

Figures / Tables (6)