Dual-beam thermal lens temperature measurement of colloidal nanoparticles

T. L. Pedrosa; C. Estupiñán-López; R. E. Araujo

doi:10.1117/12.2593262

1 August 2021 Dual-beam thermal lens temperature measurement of colloidal nanoparticles

T. L. Pedrosa, C. Estupiñán-López, R. E. Araujo

Proceedings Volume 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX; 117971W (2021) https://doi.org/10.1117/12.2593262
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

Highly sensitive thermometric methods are essential to the evaluation of nanoplatforms for thermal applications. In this study, the dual-beam thermal lens technique was introduced to assess the optically induced temperature changes in colloidal samples of gold nanoparticles. Dual-beam measurements were performed on a 0.05 mg/mL gold nanospheres (50 nm diameter) aqueous solution and the localized nanoparticle temperature were determined. The system was able to detect temperature variations as low as 10^-2 °C, with 0.2 °C^-1 sensitivity in the assessment of metallic nanoparticle colloids. Furthermore, thermal lens measurements also allowed the acquisition of the nanoparticle absorption cross-section value, regardless of its scattering properties.

Conference Presentation

Citation Download Citation

T. L. Pedrosa, C. Estupiñán-López, and R. E. Araujo "Dual-beam thermal lens temperature measurement of colloidal nanoparticles", Proc. SPIE 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX, 117971W (1 August 2021); https://doi.org/10.1117/12.2593262

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