Synthesis of Porous Polydimethylsiloxane Gold Nanoparticles Composites by a Single Step Laser Ablation Process
Language English Country Switzerland Media electronic
Document type Journal Article
PubMed
34830035
PubMed Central
PMC8623421
DOI
10.3390/ijms222212155
PII: ijms222212155
Knihovny.cz E-resources
- Keywords
- absorbance, curing time, laser ablation in medium, nanoparticles, polydimethylsiloxane, porous composite, scanning electron microscopy,
- MeSH
- Dimethylpolysiloxanes chemistry MeSH
- Metal Nanoparticles chemistry MeSH
- Laser Therapy * MeSH
- Nanocomposites chemistry MeSH
- Porosity MeSH
- Gold chemistry MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Dimethylpolysiloxanes MeSH
- Gold MeSH
Typically, polymeric composites containing nanoparticles are realized by incorporating pre-made nanoparticles into a polymer matrix by using blending solvent or by the reduction of metal salt dispersed in the polymeric matrix. Generally, the production of pre-made Au NPs occurs in liquids with two-step processes: producing the gold nanoparticles first and then adding them to the liquid polymer. A reproducible method to synthetize Au nanoparticles (NPs) into polydimethylsiloxane (PDMS) without any external reducing or stabilizing agent is a challenge. In this paper, a single-step method is proposed to synthetize nanoparticles (NPs) and at the same time to realize reproducible porous and bulk composites using laser ablation in liquid. With this single-step process, the gold nanoparticles are therefore produced directly in the liquid polymer. The optical properties of the suspensions of AuNPs in distilled water and in the curing agent have been analyzed by the UV-VIS spectroscopy, employed in the transmission mode, and compared with those of the pure curing agent. The electrical dc conductivity of the porous PDMS/Au NPs nanocomposites has been evaluated by the I-V characteristics. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis have monitored the composition and morphology of the so-obtained composites and the size of the fabricated Au nanoparticles. Atomic force microscopy (AFM) has been used to determine the roughness of the bulk PDMS and its Au NP composites.
Department of Physics Messina University 5 le F S D'Alcontres 31 98166 Messina Italy
Department of Solid State Engineering Institute of Chemical Technology 166 28 Prague Czech Republic
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