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Title: Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry

Abstract

Hybrid semiconductor–metal nanoscale constructs are of both fundamental and practical interest. Semiconductor nanocrystals are active emitters of photons when stimulated optically, while the interaction of light with nanosized metal objects results in scattering and ohmic damping due to absorption. In a combined structure, the properties of both components can be realized together. At the same time, metal–semiconductor coupling may intervene to modify absorption and/or emission processes taking place in the semiconductor, resulting in a range of effects from photoluminescence quenching to enhancement. We show here that photostable ‘giant’ quantum dots when placed at the center of an ultrathin gold shell retain their key optical property of bright and blinking-free photoluminescence, while the metal shell imparts efficient photothermal transduction. The latter is despite the highly compact total particle size (40–60 nm “inorganic” diameter and <100 nm hydrodynamic diameter) and the very thin nature of the optically transparent Au shell. Furthermore, the sensitivity of the quantum dot emission to local temperature provides a novel internal thermometer for recording temperature during infrared irradiation-induced photothermal heating.

Authors:
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Texas at Dallas, Richardson, TX (United States)
  3. Fordham Univ., Bronx, NY (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1234424
Report Number(s):
LA-UR-15-20905
Journal ID: ISSN 2041-6520; CSHCBM
Grant/Contract Number:  
2009LANL1096; SC0010697; AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Chemical Science
Additional Journal Information:
Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 2041-6520
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Karan, Niladri S., Keller, Aaron M., Sampat, Siddharth, Roslyak, Oleksiy, Arefin, Ayesha, Hanson, Christina J., Casson, Joanna L., Desireddy, Anil, Ghosh, Yagnaseni, Piryatinski, Andrei, Iyer, Rashi, Htoon, Han, Malko, Anton V., and Hollingsworth, Jennifer A. Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry. United States: N. p., 2015. Web. doi:10.1039/c5sc00020c.
Karan, Niladri S., Keller, Aaron M., Sampat, Siddharth, Roslyak, Oleksiy, Arefin, Ayesha, Hanson, Christina J., Casson, Joanna L., Desireddy, Anil, Ghosh, Yagnaseni, Piryatinski, Andrei, Iyer, Rashi, Htoon, Han, Malko, Anton V., & Hollingsworth, Jennifer A. Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry. United States. doi:10.1039/c5sc00020c.
Karan, Niladri S., Keller, Aaron M., Sampat, Siddharth, Roslyak, Oleksiy, Arefin, Ayesha, Hanson, Christina J., Casson, Joanna L., Desireddy, Anil, Ghosh, Yagnaseni, Piryatinski, Andrei, Iyer, Rashi, Htoon, Han, Malko, Anton V., and Hollingsworth, Jennifer A. Mon . "Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry". United States. doi:10.1039/c5sc00020c. https://www.osti.gov/servlets/purl/1234424.
@article{osti_1234424,
title = {Plasmonic giant quantum dots: Hybrid nanostructures for truly simultaneous optical imaging, photothermal effect and thermometry},
author = {Karan, Niladri S. and Keller, Aaron M. and Sampat, Siddharth and Roslyak, Oleksiy and Arefin, Ayesha and Hanson, Christina J. and Casson, Joanna L. and Desireddy, Anil and Ghosh, Yagnaseni and Piryatinski, Andrei and Iyer, Rashi and Htoon, Han and Malko, Anton V. and Hollingsworth, Jennifer A.},
abstractNote = {Hybrid semiconductor–metal nanoscale constructs are of both fundamental and practical interest. Semiconductor nanocrystals are active emitters of photons when stimulated optically, while the interaction of light with nanosized metal objects results in scattering and ohmic damping due to absorption. In a combined structure, the properties of both components can be realized together. At the same time, metal–semiconductor coupling may intervene to modify absorption and/or emission processes taking place in the semiconductor, resulting in a range of effects from photoluminescence quenching to enhancement. We show here that photostable ‘giant’ quantum dots when placed at the center of an ultrathin gold shell retain their key optical property of bright and blinking-free photoluminescence, while the metal shell imparts efficient photothermal transduction. The latter is despite the highly compact total particle size (40–60 nm “inorganic” diameter and <100 nm hydrodynamic diameter) and the very thin nature of the optically transparent Au shell. Furthermore, the sensitivity of the quantum dot emission to local temperature provides a novel internal thermometer for recording temperature during infrared irradiation-induced photothermal heating.},
doi = {10.1039/c5sc00020c},
journal = {Chemical Science},
number = 4,
volume = 6,
place = {United States},
year = {Mon Feb 09 00:00:00 EST 2015},
month = {Mon Feb 09 00:00:00 EST 2015}
}

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Cited by: 12 works
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