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      Fluorescent Si QD decoration onto a flexible polymeric electrospun nanofibrous mat for the colorimetric sensing of TNT

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      Author
      Arslan, O.
      Aytac Z.
      Uyar, Tamer
      Date
      2017
      Source Title
      Journal of Materials Chemistry C
      Print ISSN
      2050-7534
      Publisher
      Royal Society of Chemistry
      Volume
      5
      Issue
      7
      Pages
      1816 - 1825
      Language
      English
      Type
      Article
      Item Usage Stats
      151
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      128
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      Abstract
      UV range light was used for the facile, effective and large-scale synthesis of visible light emitting, surface-protected silicon quantum dots (Si QDs) starting from an amine-functionalized alkoxy silane precursor. Within mild and easy hydrolysis/condensation environments, the use of an amine-functionalized precursor together with a reducing agent resulted in a bright visible green light that could be used for fluorescent analytical detection systems. Visible light emitting Si QDs were investigated and it was found that their emission character depends on the illumination time, hydrolysis/condensation conditions and pretreatments for the silane coupling agents. A Nylon 6,6 electrospun nanofibrous mat was selected as a substrate for decoration by the Si QDs in order to fabricate a flexible and free-standing polymeric nanofibrous mat posessing a visible light emitting character so that it could act as a visible colorimetric sensor. The visible light emitting Si QDs were decorated onto the Nylon 6,6 nanofibrous mats via covering the surfaces as a ‘nanodress’ by a simple impregnation/dip-coating and heat-curing methods. The analytical results revealed that the Si QDs decorated flexible polymeric nanofibrous mats could be utilized for colorimetric trinitrotoluene (TNT) detection in low concentrations.
      Keywords
      Color
      Colorimetry
      Coupling agents
      Explosives detection
      Fluorescence
      Hydrolysis
      Light emission
      Nanofibers
      Polyamides
      Polymers
      Rayon
      Semiconductor quantum dots
      Silicon
      Analytical detection
      Analytical results
      Colorimetric sensing
      Colorimetric sensors
      Large scale synthesis
      Low concentrations
      Silane coupling agent
      Silicon quantum dots
      Light
      Permalink
      http://hdl.handle.net/11693/37245
      Published Version (Please cite this version)
      https://doi.org/10.1039/c6tc05521d
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 1831
      • Nanotechnology Research Center (NANOTAM) 1026
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