Photoacoustic effect measurement in aqueous suspensions of gold nanorods caused by low-frequency and low-power near-infrared pulsing laser irradiation

Sanchez Lopez de Pablo, Cristina and Ramos Ávila, Julio Alberto and Fernández Caballero, Carlos and Pozo Guerrero, Francisco del and Serrano Olmedo, Jose Javier (2013). Photoacoustic effect measurement in aqueous suspensions of gold nanorods caused by low-frequency and low-power near-infrared pulsing laser irradiation. "Applied Optics", v. 52 (n. 19); pp. 4698-4705. ISSN 1559-128X. https://doi.org/10.1364/AO.52.004698.

Description

Title: Photoacoustic effect measurement in aqueous suspensions of gold nanorods caused by low-frequency and low-power near-infrared pulsing laser irradiation
Author/s:
  • Sanchez Lopez de Pablo, Cristina
  • Ramos Ávila, Julio Alberto
  • Fernández Caballero, Carlos
  • Pozo Guerrero, Francisco del
  • Serrano Olmedo, Jose Javier
Item Type: Article
Título de Revista/Publicación: Applied Optics
Date: July 2013
ISSN: 1559-128X
Volume: 52
Subjects:
Faculty: Centro de Tecnología Biomédica (CTB) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

When aqueous suspensions of gold nanorods are irradiated with a pulsing laser (808 nm), pressure waves appear even at low frequencies (pulse repetition rate of 25 kHz). We found that the pressure wave amplitude depends on the dynamics of the phenomenon. For fixed concentration and average laser current intensity, the amplitude of the pressure waves shows a trend of increasing with the pulse slope and the pulse maximum amplitude.We postulate that the detected ultrasonic pressure waves are a sort of shock waves that would be generated at the beginning of each pulse, because the pressure wave amplitude would be the result of the positive interference of all the individual shock waves.

More information

Item ID: 26573
DC Identifier: http://oa.upm.es/26573/
OAI Identifier: oai:oa.upm.es:26573
DOI: 10.1364/AO.52.004698
Official URL: http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-52-19-4698
Deposited by: Memoria Investigacion
Deposited on: 21 Apr 2015 16:42
Last Modified: 21 Apr 2015 16:42
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