Optical heating and temperature determination of core-shell gold nanoparticles and single-walled carbon nanotube microparticles.
Small
; 11(11): 1320-7, 2015 Mar 18.
Article
em En
| MEDLINE
| ID: mdl-25367373
ABSTRACT
The real-time temperature measurement of nanostructured materials is particularly attractive in view of increasing needs of local temperature probing with high sensitivity and resolution in nanoelectronics, integrated photonics, and biomedicine. Light-induced heating and Raman scattering of single-walled carbon nanotubes with adsorbed gold nanoparticles decorating silica microparticles are reported, by both green and near IR lasers. The plasmonic shell is used as nanoheater, while the single-walled carbon nanotubes are Raman active and serve as a thermometer. Stokes and Anti-Stokes Raman spectra of single-walled carbon nanotubes serve to estimate the effective light-induced temperature rise on the metal nanoparticles. The temperature rise is constant with time, indicating stability of the adsorption density. The effective temperatures derived from Stokes and Anti-Stokes intensities are correlated with those measured in a heating stage. The resolution of the thermal experiments in our study was found to be 5-40 K.
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MEDLINE
Assunto principal:
Análise Espectral Raman
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Teste de Materiais
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Termografia
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Nanotubos de Carbono
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Nanopartículas Metálicas
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Ouro
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article