Control of localized surface plasmon resonance of Ag nanoparticles by changing its size and morphology

Kiba, Takayuki; Masui, Kazuaki; Inomata, Yuuki; Furumoto, Atsushi; Kawamura, Midori; Abe, Yoshio; Kim, Kyung Ho

doi:10.1016/j.vacuum.2021.110432

Cited by 32 publications

(10 citation statements)

References 28 publications

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“…This could be attributed to the optimum size of uniformly distributed AgNPs in Ag-rGO@150C, rather than sparsely located bigger size Ag particles in Ag-rGO@200C. Enhancement in the emission, upon increase in the size of the AgNPs happens due to the diffusive reflection or scattering by the large particles [41]. Although the particle size of AgNPs is 220 nm in the Ag-rGO@200C sample and has least emission intensity, this is due to the reason that AgNPs in this sample are sparse and scattered (see figures 7(c) and (f)).…”

Section: Optical Propertiesmentioning

confidence: 99%

Synergistic effects of hydrothermally decorated Ag nanoparticles over rGO for antibacterial activities

Kalia,

Bala,

Jain

et al. 2023

Phys. Scr.

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Antibacterial activity of the silver decorated reduced graphene oxide (Ag-rGO) nanocomposites have been investigated against E. coli as a model for gram-negative bacteria. The effect of temperature during the hydrothermal treatment of Ag-rGO nanocomposites synthesized by simultaneous reduction of GO and AgNO3 over the antibacterial activity has been studied. The composite samples were further reduced hydrothermally at different temperatures, viz. 100 °C, 150 °C, and 200 °C for 24 h to integrate silver nanoparticles (AgNPs) into rGO. Variations in the hydrothermal treatment temperature allowed alterations in the morphology and particle size of the AgNPs. The AgNPs grown at room temperature are in bunches and smaller sizes, whereas the hydrothermally treated samples have uniformly distributed bigger AgNPs. The particle size of AgNPs on rGO grows from 45 nm at room temperature to 65 nm and 220 nm in the hydrothermally treated samples at 150 °C and 200 °C, respectively. The antibacterial activity of the Ag-rGO composite has been observed to be size dependent. The Ag-rGO composite hydrothermally treated at 150 °C, having a particle size of ∼65 nm, has been observed to have the highest activity; the zone of inhibition is 3.4 ± 2.8 cm. The Ag nanocrystallite’s edges and defects in the rGO sheets together destroy the bacterial cells in a series of stages, ultimately resulting in cell death and high antibacterial activity.

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Section: Optical Propertiesmentioning

confidence: 99%

Synergistic effects of hydrothermally decorated Ag nanoparticles over rGO for antibacterial activities

Kalia,

Bala,

Jain

et al. 2023

Phys. Scr.

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“…The refractive index (RI) sensitivity of LSPR sensors is determined by the material composition, crystallinity, size, uniformity, surface morphology, shape, and arrangement (i.e., spacing between NPs). 71,72 Accordingly, the size, shape, and composition of metallic NPs are parameters that effect the LSPR frequency. Several groups have prepared metal NPs, particularly Au and Ag NPs.…”

Section: Gold and Silver Pure Particlesmentioning

confidence: 99%

Bonding states of gold/silver plasmonic nanostructures and sulfur-containing active biological ingredients in biomedical applications: a review

Esmailzadeh,

Taheri-Ledari,

Salehi

et al. 2024

Phys. Chem. Chem. Phys.

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“…The size and shape of the nanoparticles are the most important factors in determining the intensity of the resonance. As shown in Figure 1 b, the extinction spectra of silver nanoparticles prepared with different initial silver deposition thicknesses, the SPR appears red-shifted as the size of silver nanoparticles changes, and the extinction spectral broadening of silver nanoparticles coincides with the trend of silver nanoparticle diameter distribution, so the LSPR resonance wavelength can be controlled by controlling the silver nanoparticle size [ 22 ]. As in Figure 1 c, the absorption band of silver nanoparticles is located at about 400 nm, and the colloidal suspension of silver nanoparticles is yellow, so the colorimetric detection of biomolecules can be performed by inducing the change of the position of the LSPR band [ 23 ].…”

Section: Surface Plasmonmentioning

confidence: 99%

Silver-Based Surface Plasmon Sensors: Fabrication and Applications

Liao

Hou

et al. 2023

IJMS

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A series of novel phenomena such as optical nonlinear enhancement effect, transmission enhancement, orientation effect, high sensitivity to refractive index, negative refraction and dynamic regulation of low threshold can be generated by the control of surface plasmon (SP) with metal micro-nano structure and metal/material composite structure. The application of SP in nano-photonics, super-resolution imaging, energy, sensor detection, life science, and other fields shows an important prospect. Silver nanoparticles are one of the commonly used metal materials for SP because of their high sensitivity to refractive index change, convenient synthesis, and high controllable degree of shape and size. In this review, the basic concept, fabrication, and applications of silver-based surface plasmon sensors are summarized.

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Control of localized surface plasmon resonance of Ag nanoparticles by changing its size and morphology

Cited by 32 publications

References 28 publications

Synergistic effects of hydrothermally decorated Ag nanoparticles over rGO for antibacterial activities

Synergistic effects of hydrothermally decorated Ag nanoparticles over rGO for antibacterial activities

Bonding states of gold/silver plasmonic nanostructures and sulfur-containing active biological ingredients in biomedical applications: a review

Silver-Based Surface Plasmon Sensors: Fabrication and Applications

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