Tuning photoacoustics with nanotransducers via thermal boundary resistance and laser pulse duration
Year: 2022
Authors: Diego M., Gandolfi M., Giordano S., Vialla F., Crut A., Vallye F., Maioli P., Del Fatti N., Banfi F.
Autors Affiliation: Univ Lyon, Univ Claude Bernard Lyon 1, Inst Lumiere Matiere, CNRS,FemtoNanoOpt Grp, F-69622 Villeurbanne, France; CNR INO, Via Branze 45, I-25123 Brescia, Italy; Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; Univ Cattolica Sacro Cuore, Interdisciplinary Labs Adv Mat Phys Lamp & Dipart, Via Garzetta 48, I-25133 Brescia, Italy; Univ Lille, Univ Polytech Hauts France, UMR 8520 IEMN Inst Elect Microelect & Nanotechnol, Cent Lille, F-59000 Lille, France; Inst Univ France IUF, F-75005 Paris, France.
Abstract: The photoacoustic effect in liquids, generated by metal nanoparticles excited with short laser pulses, offers high contrast imaging and promising medical treatment techniques. Understanding the role of the thermal boundary resistance (TBR) and the laser pulse duration in the generation mechanism of acoustic waves is essential to implement efficient photoacoustic nanotransducers. This work theoretically investigates, for the paradigmatic case of water-immersed gold nanocylinders, the role of the TBR and laser pulse duration in the competition between the launching mechanisms: the thermophone and the mechanophone. In the thermophone, the nanoparticle acts as a nanoheater and the wave is launched by water thermal expansion. In the mechanophone, the nanoparticle directly acts as a nanopiston. Specifically, for a gold-water interface, the thermophone prevails under ns light pulse irradiation, while the mechanophone dominates shortening the pulse to the 10 ps regime. For a graphene-functionalized gold-water interface, instead, the mechanophone dominates over the entire range of explored laser pulse durations. The results point to high-TBR, liquid-immersed nanoparticles as potentially efficient photoacoustic nanogenerators, with the advantage of keeping the liquid environment temperature unaltered. Published under an exclusive license by AIP Publishing.
Journal/Review: APPLIED PHYSICS LETTERS
Volume: 121 (25) Pages from: 252201-1 to: 252201-6
More Information: This work was partially supported by the LABEX iMUST (No. ANR-10-LABX-0064) of Universite de Lyon within the program Investissements d’Avenir (No. ANR-11-IDEX-0007) and by ANR through projects 2D-PRESTO (No. ANR-19-CE09-0027) and ULTRASINGLE (No. ANR-20-CE30-0016). F.B. acknowledges financial support from CNRS through Delegation CNRS 2021-2022.KeyWords: Gold Nanoparticles; Kapitza Resistance; Dependence; Transport; Nanorods; Temperature; Generation; Interfaces; Conversion; StabilityDOI: 10.1063/5.0135147ImpactFactor: 4.000Citations: 2data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-09-15References taken from IsiWeb of Knowledge: (subscribers only)
