Metal Nanoparticles Dispersed in Epoxy Resin: Synthesis, Optical Properties and Applications

Rentería, Víctor; Franco, Alfredo

doi:10.1007/978-3-030-18834-4_8

Cited by 4 publications

(2 citation statements)

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“…In particular, several methods have been developed for tuning the optical properties of spherical silver and gold Nps dispersed in epoxy resin [11][12][13][14][15] such as thermal vacuum deposition, ion implantation, solvothermal, photochemical, and chemical reduction. The tunable surface plasmon resonance of spherical silver Nps homogeneously dispersed in an epoxy resin can be in uenced by reducing, capping, and curing agents [11]. These Nps exhibit relatively narrow size distributions and absorption spectra with peaks around 420-450 nm for average sizes from 3 to 50 nm.…”

Section: Introductionmentioning

confidence: 99%

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Solvatochromism of a silver-epoxy nanocomposite dispersed in organic solvents

Sánchez

Barrera-Calva

Rentería-Tapia

2022

Preprint

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Fresh and aged silver-epoxy nanocomposites were dispersed in aprotic solvents having different dielectric constants (ε) like Acetone (Ace), N, N-dimethylformamide (DMF), and dimethylsulphoxide (DMSO). Different colors and hues of the dispersions depending on the dielectric constant of the solvents were observed, suggesting a solvatochromic behavior. Aggregated and isolated triangular silver nanoprisms with sharp corners were predominant for fresh and aged dispersions in Acetone (ε = 21.0), respectively. Whereas, aggregated and isolated truncated triangular silver nanoprisms were observed for the ones in DMF (ε = 36.7), respectively. Stacks of elongated silver nanoparticles (Nps) predominated for both fresh and aged dispersions prepared in DMSO (ε = 47.2). It was found that as the dielectric constant of the solvents increases the average size of the Nps diminishes and the silver nanoprisms were transformed into elongated shapes, for both fresh and aged samples. These morphologies have an important impact on the position and shape of the plasmonic resonance. The dipolar optical extinction maximum of the silver Nps of aged samples was linearly red-shifted with an increase in the dielectric constant of the solvents. On the other hand, it was observed higher stability for silver Nps dispersed in DMSO and DMF compared with Ace in both fresh and aged samples. The results show the influence of the solvent dielectric constant on the optical properties, size distribution, morphology, and stability of the silver Nps. A solvatochromic mechanism of the silver Nps based on the coalescence of small silver seed Nps (< 40 nm) is proposed.

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Section: Introductionmentioning

confidence: 99%

“…Despite this limitation, the apparent disadvantage can be exploited to induce aggregation states of metal Nps exhibiting an e cient plasmonic coupling for practical applications as analytes sensing, photothermal conversion, optical modulation, electrochromism, etc. [11].…”

Section: Introductionmentioning

confidence: 99%