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Design of a fluorinated magneto-responsive material with tuneable ultrasound scattering properties

dc.rights.licenseopen
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 3 LCPO : Polymer Self-Assembly & Life Sciences
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorZIMNY, Kévin
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorMASCARO, Benoit
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorBRUNET, Thomas
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorPONCELET, Olivier
hal.structure.identifierInstitut de Mécanique et d'Ingénierie de Bordeaux [I2M]
dc.contributor.authorARISTÉGUI, Christophe
hal.structure.identifierLaboratoire du Futur [LOF]
dc.contributor.authorLENG, Jacques
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 3 LCPO : Polymer Self-Assembly & Life Sciences
dc.contributor.authorSANDRE, Olivier
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorMONDAIN-MONVAL, Olivier
IDREF: 084112654
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2014
dc.identifier.issn2050-750X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/19953
dc.description.abstractEnIn this work, we describe the preparation of emulsions of fluorinated ferrofluid droplets suspended in a yield-stress hydrogel (Bingham fluid) with potential applications for ultrasound (US) spectroscopy and imaging. Fluorinated ferrofluids were obtained using an original multi-step process leading to an appropriate suspension of magnetic nanoparticles (MNPs) coated by a layer of fluoroalkylsilane in fluorinated oil. The efficiency of the sol-gel coating reaction was assessed by several methods including infrared and X-ray photoelectron spectroscopy, small angle neutron scattering and magnetometry. The resulting suspension of silanized-MNPs behaves as a true fluorinated ferrofluid, remaining stable (i.e. a monophasic suspension of well dispersed MNPs) in magnetic inductions as high as 7 T. These ferrofluids were employed to prepare monodisperse emulsions in a Bingham gel using a robotic injection device. Using ultrasound spectroscopy, we show that the emulsion droplets behave as Mie-type acoustic wave resonators due to the high sound-speed contrast between the droplets and the matrix. When subjected to a magnetic field, the ferrofluid droplets elongate in the field direction, which in return modifies the acoustic response of the material. The resonance frequency peaks scale as the inverse of the emulsion droplet size encountered by the wave propagation vector. These results might open a new road towards the realisation of ultrasound contrast agents guided by magnetic fields and with a tuneable attenuation spectrum.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enDesign of a fluorinated magneto-responsive material with tuneable ultrasound scattering properties
dc.typeArticle de revue
dc.identifier.doi10.1039/c3tb21585g
dc.subject.halChimie/Polymères
dc.subject.halChimie/Chimie inorganique
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of materials chemistry‎ B
bordeaux.page1285-1297
bordeaux.volume2
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue10
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-00948290
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00948290v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20materials%20chemistry%E2%80%8E%20B&rft.date=2014&rft.volume=2&rft.issue=10&rft.spage=1285-1297&rft.epage=1285-1297&rft.eissn=2050-750X&rft.issn=2050-750X&rft.au=ZIMNY,%20K%C3%A9vin&MASCARO,%20Benoit&BRUNET,%20Thomas&PONCELET,%20Olivier&ARIST%C3%89GUI,%20Christophe&rft.genre=article


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