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The characterisation of polydimethylsiloxane containing gold nanoparticles as a function of curing time
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SYSNO ASEP 0542125 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The characterisation of polydimethylsiloxane containing gold nanoparticles as a function of curing time Author(s) Cutroneo, Mariapompea (UJF-V) ORCID, RID, SAI
Havránek, Vladimír (UJF-V) RID, SAI, ORCID
Macková, Anna (UJF-V) RID, ORCID, SAI
Malinský, Petr (UJF-V) RID, ORCID, SAI
Torrisi, Alfio (UJF-V) RID, ORCID
Silipigni, L. (IT)
Slepička, P. (CZ)
Fajstavr, D. (CZ)
Torrisi, L. (IT)Number of authors 9 Source Title Surface and Interface Analysis - ISSN 0142-2421
Roč. 53, č. 7 (2021), s. 618-626Number of pages 9 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords absorbance ; atomic-force microscopy ; curing time ; nanoparticles ; porous polydimethylsiloxane ; scanning electron microscopy Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) R&D Projects GA19-02482S GA ČR - Czech Science Foundation (CSF) EF16_013/0001812 GA MŠk - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CANAM II - 90056 - Ústav jaderné fyziky AV ČR, v. v. i. Method of publishing Limited access Institutional support UJF-V - RVO:61389005 UT WOS 000639358000001 EID SCOPUS 85104255795 DOI 10.1002/sia.6948 Annotation Spherical gold nanoparticles (NPs), 10 nm in diameter, have been dispersed in a type of polydimethylsiloxane, whose polymerisation requires accurate temperature control. At the temperature of 100 degrees C, the polymerisation of the polydimethylsiloxane matrix is completed in 15 min, whereas at room temperature (similar to 20 degrees C), it takes about 24-48 h. Gold NPs were incorporated into polydimethylsiloxane after which the resulting nanocomposites were placed in an oven preheated to 100 degrees C for different curing times. Both porous and bulk nanocomposites were obtained using a bottom-up approach. Polydimethylsiloxane (PDMS) nanocomposites with the weight-percentage concentration of 0.2% of Au NPs were cured for 15, 30 and 45 min. Different curing times have affected the Au-NP properties. The network of porous PDMS nanocomposite promotes a uniform anchoring of the gold NPs. The porous PDMS nanocomposite samples, prepared using the sugar-template method, have been compared with the bulk counterpart to obtain a full characterisation of the material. The dependence of the morphological and electrical properties of gold NPs on their size has been studied by atomic-force microscopy and two-point-probe electrical-conductivity measurement. The optical performance of the bulk PDMS nanocomposites has been analysed by ultraviolet-visible (UV-vis) spectroscopy in the transmission mode. An enhancement of the absorption was observed after the increase of both the nanocomposite-curing time and the percentage of the Au NPs used as fillers. The fabricated nanocomposite can be used to manufacture optical-sensing devices, switches in optoelectronics and optical waveguides. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2022 Electronic address https://doi.org/10.1002/sia.6948
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