Title: Time-resolved Z-scan investigation of photoheating effect in aqueous suspensions of gold nanorods

Authors: Claudia I. García-Gil; Anatoly V. Khomenko; Marco A. García-Zárate

Addresses: Optics Department, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, Zona Playitas. C.P. 22860, Ensenada, B.C., Mexico ' Optics Department, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, Zona Playitas. C.P. 22860, Ensenada, B.C., Mexico ' Optics Department, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, Zona Playitas. C.P. 22860, Ensenada, B.C., Mexico

Abstract: In this paper, we study photothermal effects in suspensions of gold nanorods in water. The heating occurs owing to the light absorption and it is especially effective when the light frequency is close to the frequency of the localised surface plasmon resonance (LSPR). We use the time-resolved Z-scan method to monitor the time-dependent temperature profile in the liquid under Gaussian beam illumination. Using the experimentally measure parameters we determine the conditions for vapour generation for different concentrations of gold nanorods.

Keywords: gold nanorods; heat generation; Z-scan; thermo-optical effect; nonlinear absorption; photoheating effect; aqueous suspensions; water; light absorption; light frequency; surface plasmon resonance; LSPR; temperature profile; nanotechnology; Gaussian beam illumination; vapour generation.

DOI: 10.1504/IJNT.2016.074524

International Journal of Nanotechnology, 2016 Vol.13 No.1/2/3, pp.73 - 79

Available online: 04 Feb 2016 *

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