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Microscale Thermophoresis in Liquids Induced by Plasmonic Heating and Characterized by Phase and Fluorescence Microscopies

hal.structure.identifierInstitut FRESNEL [FRESNEL]
dc.contributor.authorSHAKIB, Sadman
hal.structure.identifierInstitut FRESNEL [FRESNEL]
dc.contributor.authorROGEZ, Benoit
hal.structure.identifierInstitut FRESNEL [FRESNEL]
dc.contributor.authorKHADIR, Samira
dc.contributor.authorPOLLEUX, Julien
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorWÜRGER, Alois
hal.structure.identifierInstitut FRESNEL [FRESNEL]
hal.structure.identifierMOSAIC [MOSAIC]
dc.contributor.authorBAFFOU, Guillaume
dc.date.issued2021-09-22
dc.identifier.issn1932-7447
dc.description.abstractEnThermophoresis denotes the motion of particles along temperature gradients. Insignificant in most daily-life observations, this peculiar effect can become dominant in applications involving nano-and microscale heating in fluids. Recent studies in nanoplasmonics observed significant thermophoresis of molecules and particles, in particular in plasmonic trapping, SERS, and biosensing. Evidencing the presence of thermophoresis is not obvious and quantifying its magnitude is even less accessible considering existing techniques. In this article, we introduce a method capable of quantifying the thermophoresis of particles in the context of nanoplasmonic applications. A gold nanoparticle array under illumination is used to create microscale temperature gradients, and a dual fluorescence-phase microscopy technique is used to map both temperature and concentration in parallel. This association enables the determination of Soret coefficients for a wide range of temperatures from a single image acquisition. This metrology technique paves the way for broader fundamental research in microscale thermophoresis in liquids and better-controlled applications in nanophotonics involving thermoplasmonic effects.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enMicroscale Thermophoresis in Liquids Induced by Plasmonic Heating and Characterized by Phase and Fluorescence Microscopies
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.jpcc.1c06299
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]
dc.subject.halChimie
bordeaux.journalJournal of Physical Chemistry C
bordeaux.page21533
bordeaux.volume125
bordeaux.issue39
bordeaux.peerReviewedoui
hal.identifierhal-03353116
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03353116v1
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