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A New Route to Fluorescent SWNT/Silica Nanocomposites: Balancing Fluorescence Intensity and Environmental Sensitivity

hal.structure.identifierPhysical Chemistry and Applied Spectroscopy
dc.contributor.authorDUQUE, Juan G.
hal.structure.identifierCenter for Integrated Nanotechnologies
dc.contributor.authorGUPTA, Gautam
hal.structure.identifierlp2n-01,lp2n-12
dc.contributor.authorCOGNET, Laurent
hal.structure.identifierlp2n-01,lp2n-12
dc.contributor.authorLOUNIS, Brahim
hal.structure.identifierCenter for Integrated Nanotechnologies
dc.contributor.authorDOORN, Stephen K.
hal.structure.identifierCenter for Integrated Nanotechnologies
dc.contributor.authorDATTELBAUM, Andrew M.
dc.date.accessioned2023-05-12T10:27:50Z
dc.date.available2023-05-12T10:27:50Z
dc.date.created2011-08-31
dc.date.issued2011
dc.identifier.issn1932-7447
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/181327
dc.description.abstractEnWe investigate the relationship between photoluminescence (PL) intensity and environmental sensitivity of surfactant-wrapped single walled carbon nanotubes (SWNTs). SWNTs were studied under a variety of conditions in suspension as well as encapsulated in silica nanocomposites, which were prepared by an efficient chemical vapor into liquids (CViL) sol-gel process. The dramatically improved silica encapsulation process described here has several advantages, including fast preparation and high SWNT loading concentration, over other encapsulation methods used to prepare fluorescent SWNT/silica nanocomposites. Further, addition of glycerol to SWNT suspensions prior to performing the CViL sol-gel process allows for the preparation of freestanding fluorescent silica xerogels, which to the best of our knowledge is the first report of such nanocomposites. Our spectroscopic data on SWNTs suspended in aqueous surfactants or encapsulated in silica show that achieving maximum PL intensity results in decreased sensitivity of SWNT emission response to changes imparted by the local environment. In addition, silica encapsulation can be used to "lock-in" a surfactant micelle structure surrounding SWNTs to minimize interactions between SWNTs and ions/small molecules. Ultimately, our work demonstrates that one should consider a balance between maximum PL intensity and the ability to sense environmental changes when designing new SWNT systems for future sensing applications.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enA New Route to Fluorescent SWNT/Silica Nanocomposites: Balancing Fluorescence Intensity and Environmental Sensitivity
dc.typeArticle de revue
dc.identifier.doi10.1021/jp2012107
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Autre [cond-mat.other]
dc.identifier.arxiv1108.6170
bordeaux.journalJournal of Physical Chemistry C
bordeaux.page15147
bordeaux.volume115
bordeaux.hal.laboratoriesLaboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298*
bordeaux.issue31
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-00618238
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00618238v1
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