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Los Alamos National LaboratoryCenter for Integrated Nanotechnologies
Helping you understand, create, and characterize nanomaterials

2020 Highlights

A selection of CINT science highlights from staff and user research.

CINT Contacts  

  • Jim Werner
  • Soft, Biological, and Composite Nanomaterials Thrust
  • Email
  • Peter Goodwin
  • Soft, Biological, and Composite Nanomaterials Thrust
  • Email
  • Jennifer Hollingsworth
  • Nanophotonics and Optical Nanomaterials Thrust
  • Email

Spatio-Temporal Optical Imaging at the Nanoscale

Scientific Achievement

Image of photoluminescence lifetime and intensity mapping of interacting quantum dots.Photoluminescence lifetime and intensity from nanoparticle assemblies was spatially mapped on the nanoscale using a newly developed super-resolution imaging system.

Significance and Impact

Closely-spaced energy donating and accepting sites can be spatially resolved and characterized with this technique, enabling direct visualization of energy transport pathways within nanostructures.

Research Details

  • The centroid of the emission profile is located with maximum likelihood estimation to within 4 nm with 10,000 detected photons.
  • Single photon arrival times are used to determine the fluorescence lifetime, antibunching, and other information related to the photon arrival statistics.

Publication: Dunlap MK, Ryan DP, Goodwin PM, Werner JH, Majumder S, Hollingsworth JA, Gelfand MP, Van Orden A. Super-resolution photoluminescence lifetime and intensity mapping of interacting CdSe/CdS quantum dots (Featured Article). Applied Physics Letters. 2020 Jan 13;116(2):021103. [DOI: 10.1063/1.5132563]

Funding: This work was funded by the Los Alamos Laboratory-Directed Research and Development Exploratory Research Program (Project No. 20180189ER) and was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC, for the U.S. Department of Energy’s NNSA, under Contract No. 89233218CNA000001. M.K.D. is grateful for support from the Gary E. Maciel Fellowship Foundation. A.V.O. acknowledges the Los Alamos Institute for Materials Research for a Rapid Response grant that supported a summer minisabbatical in 2017. LA-UR-19-30441, unlimited release.