Imperial College London
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ProfessorEmilianoCortes

Faculty of Engineering, Department of Materials

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e.cortes

 
 
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Location

 

Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Barella:2021:10.1021/acsnano.0c06185,
author = {Barella, M and Violi, IL and Gargiulo, J and Martinez, LP and Goschin, F and Guglielmotti, V and Pallarola, D and Schluecker, S and Pilo-Pais, M and Acuna, GP and Maier, SA and Cortes, E and Stefani, FD},
doi = {10.1021/acsnano.0c06185},
journal = {ACS Nano},
pages = {2458--2467},
title = {In situ photothermal response of single gold nanoparticles through hyperspectral imaging anti-stokes thermometry},
url = {http://dx.doi.org/10.1021/acsnano.0c06185},
volume = {15},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Several fields of applications require a reliable characterization of the photothermal response and heat dissipation of nanoscopic systems, which remains a challenging task for both modeling and experimental measurements. Here, we present an implementation of anti-Stokes thermometry that enables the in situ photothermal characterization of individual nanoparticles (NPs) from a single hyperspectral photoluminescence confocal image. The method is label-free, potentially applicable to any NP with detectable anti-Stokes emission, and does not require any prior information about the NP itself or the surrounding media. With it, we first studied the photothermal response of spherical gold NPs of different sizes on glass substrates, immersed in water, and found that heat dissipation is mainly dominated by the water for NPs larger than 50 nm. Then, the role of the substrate was studied by comparing the photothermal response of 80 nm gold NPs on glass with sapphire and graphene, two materials with high thermal conductivity. For a given irradiance level, the NPs reach temperatures 18% lower on sapphire and 24% higher on graphene than on bare glass. The fact that the presence of a highly conductive material such as graphene leads to a poorer thermal dissipation demonstrates that interfacial thermal resistances play a very significant role in nanoscopic systems and emphasize the need for in situ experimental thermometry techniques. The developed method will allow addressing several open questions about the role of temperature in plasmon-assisted applications, especially ones where NPs of arbitrary shapes are present in complex matrixes and environments.
AU  - Barella,M
AU  - Violi,IL
AU  - Gargiulo,J
AU  - Martinez,LP
AU  - Goschin,F
AU  - Guglielmotti,V
AU  - Pallarola,D
AU  - Schluecker,S
AU  - Pilo-Pais,M
AU  - Acuna,GP
AU  - Maier,SA
AU  - Cortes,E
AU  - Stefani,FD
DO  - 10.1021/acsnano.0c06185
EP  - 2467
PY  - 2021///
SN  - 1936-0851
SP  - 2458
TI  - In situ photothermal response of single gold nanoparticles through hyperspectral imaging anti-stokes thermometry
T2  - ACS Nano
UR  - http://dx.doi.org/10.1021/acsnano.0c06185
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000623061800035&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acsnano.0c06185
UR  - http://hdl.handle.net/10044/1/95322
VL  - 15
ER  -
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