Localized Plasmon resonance in metal nanoparticles using Mie theory

Duque, Johan S.; Blandon, Juan S.; Riascos, Henry

doi:10.1088/1742-6596/850/1/012017

Cited by 33 publications

(23 citation statements)

References 4 publications

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“…For NPs prepared with the wavelength of 532 nm, a peak around 350 nm appears, evidencing agglomeration and the formation of larger particles. This is in accordance with theory corresponding with LSPR [33][34][35]. In MONPs produced with a wavelength of 1064 nm, change is observed.…”

Section: Uv-vis Analysissupporting

confidence: 92%

Colloidal Metal Oxide Nanoparticles Prepared by Laser Ablation Technique and Their Antibacterial Test

Duque

Madrigal

Riascos

et al. 2019

Colloids and Interfaces

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In this article we report the production of metal oxide (TiFe2O4, ZnFe2O4) nanoparticles by pulsed laser ablation technique in a liquid environment. We used nanosecond Nd: YAG laser systems working at 532 nm and 1064 nm of wavelength and the energy of the laser beam was kept constant at 80 mJ. Absorbance spectra, surface plasmon resonance, optical band-gap, and nanoparticle morphology were investigated using ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Changing the wavelength of the laser for growth, nanoparticles showed shift between the absorbance and surface plasmon resonance peaks in their UV-Vis spectra, which implies that the optical properties of the colloid nanoparticles depend on laser parameters. This was confirmed with the variation of the band gap energy. Furthermore, redshift for the absorbance peak was observed for samples as-grown at 532 nm around 150 nm as a function of time preparation. Conversely, for the samples as-grown at 1064 nm there was no shift in the absorbance spectra, which could be due to agglomeration and formation of larger particles. The characterization results showed appropriate plasmonic photo-catalysts properties of the particles, hence the photoactivation of the nanoparticles was examined on antibacterial effect using colonies of Staphylococcus aureus and Escherichia coli.

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Section: Uv-vis Analysissupporting

confidence: 92%

Colloidal Metal Oxide Nanoparticles Prepared by Laser Ablation Technique and Their Antibacterial Test

Duque

Madrigal

Riascos

et al. 2019

Colloids and Interfaces

View full text Add to dashboard Cite

show abstract

“…The figure 2c and 2d show the spectra of colloidal MNPs a month afterwards of synthesis for 1064 nm and 532 nm. For NPs prepared with wavelength of 532 nm, a peak around 350 nm appear, evidencing agglomeration and formation of larger particles, this is according to theory corresponding with LSPR [33][34][35]. Whereas in MONPs produced with wavelength of 1064 nm change is observed.…”

Section: Uv-vis Analysissupporting

confidence: 58%

Colloidal Metal Oxide<sub> </sub>Nanoparticles Prepared by Laser Ablation Technique and Their Antibacterial Test

Duque¹,

Moreno²,

Avila³

et al. 2019

Preprint

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We report the production of metal oxide (TiFe2O4, ZnFe2O4) nanoparticles by pulsed laser ablation technique in liquid environment. We used nano second Nd: YAG   laser systems working at 532 nm and 1064 nm of wavelength, the energy of the laser beam was kept constant at 80 mJ. Absorbance spectra, surface plasmon resonance, optical band-gap and nanoparticle morphology were investigated using ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Changing the wavelength of the laser for growth, nanoparticles shown shift between the absorbance and surface plasmon resonance peaks in their UV-Vis spectra, this implies that the optical properties of the colloid nanoparticles depends on laser parameters, this was confirmed with the variation of the band gap energy. Furthermore, red shift for the absorbance peak was observed for samples as-growth at 532 nm around the 150 nm as function of time preparation. Whereas, for the samples as-growth at 1064 nm there is no shift in the absorbance spectra, this can be due to agglomeration and formation of larger particles. The characterization results shown appropriate plasmonic photo-catalysts properties of the particles, hence the photo activation of the nanoparticles was examined on antibacterial effect using colonies of Staphylococcus Aureus and Escherichia coli.

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“…However, currently it has begun to explore new applications using these such as anticancer agents [4] because they also present optical properties. These properties are associated with a phenomenon called localized surface plasmon resonance, which consisting of a collective and coherent oscillation of the free electrons of the conduction band of metallic nanoparticles [12]. This property depends on the shape and size of nanoparticles [13], and it has been used in some applications such as photothermal therapy to generate a thermal response [3,6,21,36].…”

Section: Introductionmentioning

confidence: 99%

AOT direct and reverse micelles as a reaction media for anisotropic silver nanoparticles functionalized with folic acid as a photothermal agent on HeLa cells

et al. 2019

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Herein, we report the synthesis of silver nanoparticles (AgNPs) using direct micelles and reverse micelles of sodium bis (2-ethylhexyl) sulfosuccinate (AOT) as reaction media. We evaluated the effect of these self-organized aggregates in the nucleation and growth mechanism of AgNPs. The results show the effect of water when it is a confined medium, where their properties are different from those of net water. These factors strongly influence the size, polydispersity and shape of nanoparticles. Moreover, the presence of ions from the reducing agents and the surfactant, it is a key factor in the anisotropy of the AgNPs obtained. For our knowledge, this is the first report in which the effect of the reaction media is evaluated by using direct and reverse micelles to synthesize silver nanoparticles. Additionally, AgNPs synthesized through the two systems were functionalized with folic acid and evaluated their cytotoxicity and photothermal properties. The results show that AgNPs synthesized through the two systems are potential photothermal agents, reaching to reduce up to 47% of the viability of the HeLa cells, using a laser of 808 nm.

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Localized Plasmon resonance in metal nanoparticles using Mie theory

Cited by 33 publications

References 4 publications

Colloidal Metal Oxide Nanoparticles Prepared by Laser Ablation Technique and Their Antibacterial Test

Colloidal Metal Oxide Nanoparticles Prepared by Laser Ablation Technique and Their Antibacterial Test

Colloidal Metal Oxide<sub> </sub>Nanoparticles Prepared by Laser Ablation Technique and Their Antibacterial Test

AOT direct and reverse micelles as a reaction media for anisotropic silver nanoparticles functionalized with folic acid as a photothermal agent on HeLa cells

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