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Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach

A frequency-resolved thermal lensing (TL) approach to measure thermal diffusivity properties of both diluted liquid solutions and silver nanoparticle colloidal suspensions is demonstrated. The experiment is based on a classical two-color pump-probe TL configuration, which is adapted to measure the i...

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Autores Principales: Rodr?guez, Luis Gerardo, C?rdenas Garc?a, Jaime Fernando
Formato: Artículos
Lenguaje:eng
Publicado: 2016
Materias:
MEASUREMENT
THERMAL
DIFFUSIVITIES
SILVER
Acceso en línea:http://repositorio.educacionsuperior.gob.ec/handle/28000/2732
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spelling oai:localhost:28000-27322017-11-01T18:31:08Z Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach Rodr?guez, Luis Gerardo C?rdenas Garc?a, Jaime Fernando MEASUREMENT THERMAL DIFFUSIVITIES SILVER A frequency-resolved thermal lensing (TL) approach to measure thermal diffusivity properties of both diluted liquid solutions and silver nanoparticle colloidal suspensions is demonstrated. The experiment is based on a classical two-color pump-probe TL configuration, which is adapted to measure the induced TL signal as a function of the chopping frequency of the pump beam. Because of the thermal diffusivity lengths in the samples, the TL signal decreases exponentially with the increment of the frequency. The exponential decay factor can be associated with the thermal diffusivity of the medium. Measurements are performed on diluted liquid solutions and silver nanoparticles suspended in a PVP solution. A suitable fitting to a theoretical model based on the Fresnel diffraction approximation of the experimental data is obtained. This work demonstrates the feasibility of using this approach for the thermal characterization of nanoparticles in liquid solutions. Thermal diffusivity as low as 0.094?10(-7)??m2 ?s(-1) can be estimated by using this approach. http://www.ncbi.nlm.nih.gov/pubmed/24978497 2016-11-08T17:56:29Z 2016-11-08T17:56:29Z 2014 article Rodr?guez, Luis Gerardo; C?rdenas Garc?a, Jaime Fernando; Vera CC.(2014).Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach. Ncbi. 1474-1741 http://repositorio.educacionsuperior.gob.ec/handle/28000/2732 eng closedAccess
institution SENESCYT
collection Repositorio SENESCYT
biblioteca Biblioteca Senescyt
language eng
format Artículos
topic MEASUREMENT
THERMAL
DIFFUSIVITIES
SILVER
spellingShingle MEASUREMENT
THERMAL
DIFFUSIVITIES
SILVER
Rodr?guez, Luis Gerardo
C?rdenas Garc?a, Jaime Fernando
Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
description A frequency-resolved thermal lensing (TL) approach to measure thermal diffusivity properties of both diluted liquid solutions and silver nanoparticle colloidal suspensions is demonstrated. The experiment is based on a classical two-color pump-probe TL configuration, which is adapted to measure the induced TL signal as a function of the chopping frequency of the pump beam. Because of the thermal diffusivity lengths in the samples, the TL signal decreases exponentially with the increment of the frequency. The exponential decay factor can be associated with the thermal diffusivity of the medium. Measurements are performed on diluted liquid solutions and silver nanoparticles suspended in a PVP solution. A suitable fitting to a theoretical model based on the Fresnel diffraction approximation of the experimental data is obtained. This work demonstrates the feasibility of using this approach for the thermal characterization of nanoparticles in liquid solutions. Thermal diffusivity as low as 0.094?10(-7)??m2 ?s(-1) can be estimated by using this approach.
author Rodr?guez, Luis Gerardo
C?rdenas Garc?a, Jaime Fernando
author_facet Rodr?guez, Luis Gerardo
C?rdenas Garc?a, Jaime Fernando
author_sort Rodr?guez, Luis Gerardo
title Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
title_short Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
title_full Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
title_fullStr Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
title_full_unstemmed Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
title_sort measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach
publishDate 2016
url http://repositorio.educacionsuperior.gob.ec/handle/28000/2732
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score 11,871979

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