Flexible thermo-plasmonics: an opto-mechanical control of the heat generated at the nanoscale

Nanoscale
Giovanna PalermoAntonio De Luca

Abstract

The opto-mechanical control of the heat generated by an amorphous arrangement of homogenously distributed gold nanoparticles (AuNPs), excited by an external laser source, is investigated. Application of a macroscopic mechanical strain to the biocompatible elastomeric tape supporting the particles leads to a nanoscale modification of their mutual inter-distance. The resulting strong variation of the particles near-field coupling gives rise to a macroscopic variation of the photo-generated heat. A fine control of the amount of generated heat is thus possible by stretching the initially isotropic sample by only a few percent. Due to the anisotropy of the stretching procedure, the plasmon band shift and thus the heat generation becomes strongly polarization-dependent. A model of the system based on Mie theory is implemented by using a finite element method. Under optical excitation, two configurations of AuNPs, representing the same cluster of particles at rest and under stretching, show a relative increase of temperature that is in good quantitative agreement with experimental data, if normalized to the number of involved particles. This system realizes for the first time an opto-mechanical control of the temperature at the nanosc...Continue Reading

References

Aug 11, 2006·The Journal of Physical Chemistry. B·J KimlingA Plech
Jan 9, 2010·ACS Nano·Guillaume BaffouF Javier García de Abajo
Oct 17, 2012·Nanoscale·Luciano De SioCesare Umeton
Jul 31, 2013·ACS Nano·Guillaume BaffouHervé Rigneault
Nov 18, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Mahshid ChekiniThomas Burgi
Aug 24, 2017·Small·Céline A S BurelRémi Dreyfus

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Citations

Jan 3, 2020·The Journal of Chemical Physics·Giuseppe Emanuele LioRoberto Caputo
Jul 3, 2021·Journal of Colloid and Interface Science·Razie Khalesi MoghaddamGiovanniantonio Natale

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