Evaluation of Optical Properties of Ag, Cu, and Co Nanoparticles Synthesized in Organic Medium

Kaminskienė, Ž.; Prosyčevas, Igoris; Stonkutė, J.; Guobienė, Asta

doi:10.12693/aphyspola.123.111

Cited by 41 publications

(26 citation statements)

References 9 publications

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“…However, because of high damping and interband transition, the Mie theory is recognized to be insufficient to properly evaluate the SPR wavelength for Co NPs. [35] Low wavenumber Raman studies Figure 3 shows a typical low wavenumber Raman spectrum obtained at room temperature for Co NPs self-organized on a silicon wafer. According to Lamb's theory, [14] the vibration modes of a free elastic sphere are described with the angular quantum momentum number l. From the selection rules, established in reference, [15] Raman active modes are characterized by an even quantum number.…”

Section: Raman Measurementsmentioning

confidence: 99%

Low wavenumber Raman scattering of cobalt nanoparticles self‐organized in 3D superlattices far from surface plasmon resonance

Meziane

Courty

Colomban

et al. 2015

J Raman Spectroscopy

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International audienceWe report the first observation of low wavenumber Raman scattering from cobalt nanoparticles under 514.5nm laser excitation. These 7.4nm diameter particles were self-organized in 3D superlattices, but we assign the Raman signature to vibrations of the individual nanoparticles, according to Lamb’s elastic sphere model. We estimate the relative Raman intensity to be around 500 times lower than it would be for silver nanoparticles, but our results demonstrate that surface plasmon–phonon resonance coupling is not mandatory to observe Lamb’s modes in metal nanoparticles

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Section: Raman Measurementsmentioning

confidence: 99%

Low wavenumber Raman scattering of cobalt nanoparticles self‐organized in 3D superlattices far from surface plasmon resonance

Meziane

Courty

Colomban

et al. 2015

J Raman Spectroscopy

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“…In this regard, Copper nanoparticles usually have a characteristic resonance band in the range 560 nm-570 nm [38]; this band is shifted toward longer wavelengths in case of larger particles [38], which toke place in this case.…”

Section: Discussionmentioning

confidence: 92%

Non-Dependency of In Vitro Fungicidal Efficiency of Copper Nanoparticles against Fusarium oxysporum upon Particle Size

Mohamed¹

2018

J Plant Pathol Microbiol

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Although many papers have consented that the smaller the size of nanoparticles, the higher their efficiency, this paper sheds light on one potential exception of this rule. The paper shows that the in vitro antifungal efficiency of copper nanoparticles against the fusarium wilt pathogen, Fusarium oxysporum, isolated from the infected date palm, Phoenix dactylifera L., is not size-dependent; instead, as it was found that larger copper nanoparticles have better in vitro antifungal efficiency against the fungal pathogen than smaller ones. Copper nanoparticles were synthesized via chemical reduction method at two different pH values, 6.5 and 10.5. Dynamic light scattering was used to measure their particle sizes, which were 345.1 nm and 278.1 nm, respectively. Transmission Electron Microscopy was used to figure out the shapes of nanoparticles, which were polygonal and spherical, respectively. Poison food essay was used to test their in vitro inhibition efficiencies against the fusarium wilt pathogen, F. oxysporum, isolated from the infected date palm, Phoenix dactylifera L., which were 46% and 19%, respectively; at the same concentration. Ultimately, the paper has proposed and discussed a potential reason beyond these unexpected findings, which relies upon the larger surface area to volume ratio of the polygonal copper nanoparticles compared to the spherical copper nanoparticles. The paper concluded that, despite their larger size, polygonal copper nanoparticles have better in vitro antifungal efficiency than spherical copper nanoparticles against F. oxysporum isolated from the infected date palm, Phoenix dactylifera L. at the same concentration.

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“…In another study, copper salt was dissolved in dioxane/-AOT solution and reduced by hydrazine hydrate under vigorous stirring. Nanocolloids sizes were 70-80 nm 27 .…”

Section: Copper Nanoparticles Synthesis Chemical Reductionmentioning

confidence: 99%

Chemical Synthesis of Copper Nanoparticles

Ghorbani¹

2014

Orient. J. Chem.

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ABSRTACTMetal nanoparticles have attracted considerable interest particularly because of the size dependence of physical and chemical properties and its enormous technological potential. Among different metal nanoparticles, copper nanoparticles have attracted great attention because copper is one of the most key metals in new technology. Chemical methods are used to synthesize copper nanoparticles and among them chemical reduction is the most frequently applied method for the preparation of stable, colloidal dispersions in organic solvents. In this paper, a brief overview of the current research worldwide in the chemical synthesis of copper nanoparticles is discussed.

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Evaluation of Optical Properties of Ag, Cu, and Co Nanoparticles Synthesized in Organic Medium

Cited by 41 publications

References 9 publications

Low wavenumber Raman scattering of cobalt nanoparticles self‐organized in 3D superlattices far from surface plasmon resonance

Low wavenumber Raman scattering of cobalt nanoparticles self‐organized in 3D superlattices far from surface plasmon resonance

Non-Dependency of In Vitro Fungicidal Efficiency of Copper Nanoparticles against Fusarium oxysporum upon Particle Size

Chemical Synthesis of Copper Nanoparticles

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