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  Photoinduced Heating of Nanoparticle Arrays

Baffou, G., Berto, P., Urena, E. B., Quidant, R., Monneret, S., Polleux, J., et al. (2013). Photoinduced Heating of Nanoparticle Arrays. ACS NANO, 7(8), 6478-6488. doi:10.1021/nn401924n.

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 Creators:
Baffou, Guillaume1, Author
Berto, Pascal1, Author
Urena, Esteban Bermudez1, Author
Quidant, Romain1, Author
Monneret, Serge1, Author
Polleux, Julien2, Author              
Rigneault, Herve1, Author
Affiliations:
1external, ou_persistent22              
2Fässler, Reinhard / Molecular Medicine, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565147              

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Free keywords: ENHANCED RAMAN-SCATTERING; GOLD NANOPARTICLES; SYSTEMS; STEPplasmonics; arrays; photothermal; temperature microscopy; wavefront sensing; femtosecond pulse;
 Abstract: The temperature distribution throughout arrays of illuminated metal nanoparticles is investigated numerically and experimentally. The two cases of continuous and femtosecond-pulsed illumination are addressed. In the case of continuous illumination, two distinct regimes are evidenced: a temperature confinement regime, where the temperature increase remains confined at the vicinity of each nanosource of heat, and a temperature delocalization regime, where the temperature is uniform throughout the whole nanoparticle assembly despite the heat sources nanometric size. We show that the occurrence of one regime or another simply depends on the geometry of the nanoparticle distribution. In particular, we derived (i) simple expressions of dimensionless parameters aimed at predicting the degree of temperature confinement and (ii) analytical expressions aimed at estimating the actual temperature increase at the center of an assembly of nanoparticles under illumination, preventing heavy numerical simulations. All these theoretical results are supported by experimental measurements of the temperature distribution on regular arrays of gold nanoparticles under illumination. In the case of femtosecond-pulsed illumination, we explain the two conditions that must be fulfilled to observe a further enhanced temperature spatial confinement.

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Language(s): eng - English
 Dates: 2013-08
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000323810600006
DOI: 10.1021/nn401924n
 Degree: -

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Title: ACS NANO
Source Genre: Journal
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Publ. Info: 1155 16TH ST, NW, WASHINGTON, DC 20036 USA : AMER CHEMICAL SOC
Pages: - Volume / Issue: 7 (8) Sequence Number: - Start / End Page: 6478 - 6488 Identifier: ISSN: 1936-0851