Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/33637

TitleOptical and electrical behavior of organic/inorganic hybrid with embedded gold nanoparticles
Author(s)Moreira, S.
Silva, J. P. B.
Silva, Carlos J. R.
Costa, M. F. M.
Gomes, M. J. M.
KeywordsGold nanoparticles
Organic–inorganic hybrids
Sol–gel
Conductivity
Electrical properties
Issue date2014
PublisherSpringer Verlag
JournalJournal of Sol-Gel Science and Technology
CitationMoreira, S., Silva, J. P. B., Silva, C. J. R., Costa, M. F. M., & Gomes, M. J. M. (2014). Optical and electrical behavior of organic/inorganic hybrid with embedded gold nanoparticles. Journal of Sol-Gel Science and Technology, 69(1), 52-60. doi: 10.1007/s10971-013-3185-4
Abstract(s)Gold nanoparticles (AuNPs) with different diameters (from 4 up to 10 nm) were immobilized within a amine-alcohol-silicate matrix [AA(600)] by mixing a preformed Au nanoparticle colloidal solution with the precursors of amine-alcohol-silicate, prior to the sol–gel transition. The organic–inorganic hybrid (OIH) nanocomposites were synthetized by sol–gel method by reaction of amino-functionalized polyether and a siloxane functionalized with a terminal epoxy group. The obtained homogeneous, high transparent and stable materials exhibit enhanced optical and electrical properties derived from plasmonic effects associated with the size and form of the nanoparticle dopants which show to be preserved during the synthesis steps. Performed electrochemical impedance spectroscopy revealed that OIH gels doped with AuNPs exhibit low conductivity that shows to be slightly dependent on dispersed Au particle sizes. The characterization of this materials by current–voltage (I–V) measurements shows that these materials exhibit an electrical stability within an range of applied potential of about 5 V and suggests that charge transfer mechanism is strongly dependent on the potential applied across the OIH gel as observed by testing different charge transfer models: space-charge-limited current, Poole–Frenkel, Schottky emission and hopping conduction or the Schottky-Simmons. The results obtained from the characterization the electrochemical properties shows that the produced material to be relevant for the potential application of OIH embedded AuNPs nanocomposites in non-volatile organic memory devices.
TypeArticle
URIhttp://hdl.handle.net/1822/33637
DOI10.1007/s10971-013-3185-4
ISSN0928-0707
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FMNC - Artigos/Papers (with refereeing)
CDQuim - Artigos (Papers)

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