Solvent-Induced Morphological Changes of Polyhedral Silver Nanoparticles in Epoxy Resin

Tapia, Victor Rentería; Sánchez, Marciano; Mora, Emilio Ramírez; Martínez, María Luisa Ojeda; Franco, Alfredo; Calva, Enrique Barrera

doi:10.1007/s11468-016-0192-7

Cited by 11 publications

(6 citation statements)

References 41 publications

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“…Size varied from 30-40 nm when analyzed under TEM model JEM-2100. Lattice fringes with 0.13 nm spacing were observed on the nanoparticle surface in ultra-high resolution TEM (UHR-TEM) images (figure 3(c)) which correspond to the (2 2 0) crystal planes of silver nanoparticle [25]. Selected area electron diffraction pattern image (figure 3(d)) showed concentric rings with bright spots due to Braggs reflection coming from separate crystals thereby affirming the crystallinity of the RcAgNPs [26].…”

Section: Tem Analysismentioning

confidence: 86%

Green synthesis of silver nanoparticles by Ricinus communis var. carmencita leaf extract and its antibacterial study

Ojha

Sett

Bora

2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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In this study, we report synthesis of silver nanoparticles (RcAgNPs) from silver nitrate solution using methanolic leaf extract of Ricinus communis var. carmencita. The polyphenols present in the leaves reduce Ag++ ions to Ag0 followed by a color change. Silver nanoparticle formation was ensured by surface plasmon resonance between 400 nm to 500 nm. Crystallinity of the synthesized nanoparticles was confirmed by UHRTEM, SAED and XRD analysis. The capping of phytochemicals and thermal stability of RcAgNPs were assessed by FTIR spectra and TGA analysis, respectively. It also showed antibacterial activity against both gram positive and gram negative strains. RcAgNPs were non-toxic against normal cell line (mouse fibroblast cell line L929) at lower concentrations (80 µg ml−1).

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Section: Tem Analysismentioning

confidence: 86%

Green synthesis of silver nanoparticles by Ricinus communis var. carmencita leaf extract and its antibacterial study

Ojha

Sett

Bora

2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…22 Indeed, it is well known that the choice of solvent used in the preparation of metal nanoparticles can have a big effect on their structure, morphology and resultant physical properties. 23,24 Similarly, metal surfaces can rearrange during catalytic turnover, which may ultimately affect the morphology of the nanoparticle.…”

Section: Introductionmentioning

confidence: 99%

Restructuring of supported Pd by green solvents: an operando quick EXAFS (QEXAFS) study and implications for the derivation of structure–function relationships in Pd catalysis

Newton

Brazier

Barreiro

et al. 2016

Catal. Sci. Technol.

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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].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a solvothermal synthesis route has been done to generate a bimodal distribution of polyhedral silver colloids (average sizes 7 nm and 68 nm) in epoxy resin [13]. This silver-epoxy nanocomposite exhibited colorimetric changes in the presence of different solvents, which were associated with morphological changes and plasmonic coupling of aggregated states of silver Nps.…”

Section: Introductionmentioning

confidence: 99%

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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Solvent-Induced Morphological Changes of Polyhedral Silver Nanoparticles in Epoxy Resin

Cited by 11 publications

References 41 publications

Green synthesis of silver nanoparticles by Ricinus communis var. carmencita leaf extract and its antibacterial study

Green synthesis of silver nanoparticles by Ricinus communis var. carmencita leaf extract and its antibacterial study

Restructuring of supported Pd by green solvents: an operando quick EXAFS (QEXAFS) study and implications for the derivation of structure–function relationships in Pd catalysis

Solvatochromism of a silver-epoxy nanocomposite dispersed in organic solvents

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