Nanoscale Thermotropic Phase Transitions Enhance Photothermal Microscopy Signals
| hal.structure.identifier | Laboratoire Photonique, Numérique et Nanosciences [LP2N] | |
| dc.contributor.author | PARRA-VASQUEZ, A. Nicholas G. | |
| hal.structure.identifier | Laboratoire Photonique, Numérique et Nanosciences [LP2N] | |
| dc.contributor.author | OUDJEDI, Laura | |
| hal.structure.identifier | Laboratoire Photonique, Numérique et Nanosciences [LP2N] | |
| dc.contributor.author | COGNET, Laurent | |
| hal.structure.identifier | lp2n-01,lp2n-12 | |
| dc.contributor.author | LOUNIS, Brahim | |
| dc.date.accessioned | 2023-05-12T10:25:19Z | |
| dc.date.available | 2023-05-12T10:25:19Z | |
| dc.date.issued | 2012-04-30 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/181247 | |
| dc.description.abstractEn | The 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.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.subject.en | single molecule detection | |
| dc.subject.en | Photothermal microscopy | |
| dc.subject.en | nanoparticles | |
| dc.subject.en | thermotropic phase transition | |
| dc.subject.en | liquid crystals | |
| dc.subject.en | single molecule detection. | |
| dc.title.en | Nanoscale Thermotropic Phase Transitions Enhance Photothermal Microscopy Signals | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/jz300369d | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Autre [cond-mat.other] | |
| dc.identifier.arxiv | 1209.5918 | |
| bordeaux.journal | Journal of Physical Chemistry Letters | |
| bordeaux.page | 1400 | |
| bordeaux.volume | 3 | |
| bordeaux.hal.laboratories | Laboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298 | * |
| bordeaux.issue | 10 | |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.institution | CNRS | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00735011 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00735011v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Physical%20Chemistry%20Letters&rft.date=2012-04-30&rft.volume=3&rft.issue=10&rft.spage=1400&rft.epage=1400&rft.au=PARRA-VASQUEZ,%20A.%20Nicholas%20G.&OUDJEDI,%20Laura&COGNET,%20Laurent&LOUNIS,%20Brahim&rft.genre=article |
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