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hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorPARRA-VASQUEZ, A. Nicholas G.
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorOUDJEDI, Laura
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
dc.contributor.authorCOGNET, Laurent
hal.structure.identifierlp2n-01,lp2n-12
dc.contributor.authorLOUNIS, Brahim
dc.date.accessioned2023-05-12T10:25:19Z
dc.date.available2023-05-12T10:25:19Z
dc.date.issued2012-04-30
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/181247
dc.description.abstractEnThe photothermal heterodyne imaging technique enabled studies of individual weakly absorbing nano-objects in various environments. It uses a photo-induced change in the refractive index of the environment. Taking advantage of the dramatic index of refraction change occurring around a thermotropic liquid crystalline phase transition, we demonstrate a 40-fold signal-to-noise ratio enhancement for gold nanoparticles imaged in 4-Cyano-4'-pentylbiphenyl (5CB) liquid crystals over those in a water environment. We studied the photothermal signal as a function of probe laser polarization, heating power, and sample temperature quantifying the optimal enhancement. This study established photothermal microscopy as a valuable technique for inducing and/or detecting local phase transitions at the nanometer scales.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.ensingle molecule detection
dc.subject.enPhotothermal microscopy
dc.subject.ennanoparticles
dc.subject.enthermotropic phase transition
dc.subject.enliquid crystals
dc.subject.ensingle molecule detection.
dc.title.enNanoscale Thermotropic Phase Transitions Enhance Photothermal Microscopy Signals
dc.typeArticle de revue
dc.identifier.doi10.1021/jz300369d
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Autre [cond-mat.other]
dc.identifier.arxiv1209.5918
bordeaux.journalJournal of Physical Chemistry Letters
bordeaux.page1400
bordeaux.volume3
bordeaux.hal.laboratoriesLaboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298*
bordeaux.issue10
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-00735011
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00735011v1
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