Studies on surface plasmon resonance and photoluminescence of silver nanoparticles

Smitha, S.L.; Nissamudeen, K.M.; Philip, Daizy; Gopchandran, K.G.

doi:10.1016/j.saa.2007.12.002

Cited by 403 publications

(196 citation statements)

References 26 publications

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“…Typically, Ag NPs exhibit absorption under a visible range of 380-450 nm, depending on the shape and size of the NPs. 51,52 UV-Vis spectroscopic analysis UV-Vis absorption spectroscopy is an important technique to monitor the formation and stability of metal NPs in aqueous solution. The absorption spectrum of metal NPs is sensitive to several factors, including particle size, shape, and particle-particle interaction (agglomeration) with the medium.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Green synthesis of silver nanoparticles mediated by Pulicaria glutinosa extract

Khan

Adil³

et al. 2013

IJN

100

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Abstract:The green synthesis of metallic nanoparticles (NPs) has attracted tremendous attention in recent years because these protocols are low cost and more environmentally friendly than standard methods of synthesis. In this article, we report a simple and eco-friendly method for the synthesis of silver NPs using an aqueous solution of Pulicaria glutinosa plant extract as a bioreductant. The as-prepared silver NPs were characterized using ultraviolet-visible spectroscopy, powder X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and Fourier-transform infrared spectroscopy. Moreover, the effects of the concentration of the reductant (plant extract) and precursor solution (silver nitrate), the temperature on the morphology, and the kinetics of reaction were investigated. The results indicate that the size of the silver NPs varied as the plant extract concentration increased. The as-synthesized silver NPs were phase pure and well crystalline with a face-centered cubic structure. Further, Fourier-transform infrared spectroscopy analysis confirmed that the plant extract not only acted as a bioreductant but also functionalized the NPs' surfaces to act as a capping ligand to stabilize them in the solvent. The developed eco-friendly method for the synthesis of NPs could prove a better substitute for the physical and chemical methods currently used to prepare metallic NPs commonly used in cosmetics, foods, and medicines.

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Section: Ft-ir Spectroscopymentioning

confidence: 99%

Green synthesis of silver nanoparticles mediated by Pulicaria glutinosa extract

Khan

Adil³

et al. 2013

IJN

100

View full text Add to dashboard Cite

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“…AgNPs are usually a cluster of particles ranging between 1 and 100 nm in size and they exhibit new properties based on their size, distribution and morphology [12]. Nanoparticles are becoming the focus of intensive research, due to their wide range of applications in areas such as catalysis, optics, antimicrobials, and biomaterial production [13,14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Solanum nigrum-mediated silver nanoparticles and its protective effect on alloxan-induced diabetic rats

Sudalai¹,

Aravinthan

Sudhakar³

et al. 2015

J Nanostruct Chem

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Solanum nigrum, a medicinal plant, traditionally used in treating diabetes mellitus. In this study, we used the leaf extract of the plant to synthesize silver nanoparticles (AgNPs), as a proposition to treat alloxaninduced diabetic rats. The phytosynthesised AgNPs were analyzed using UV-visible and Fourier transform infra-red spectroscopy for their functional groups. Transmission electron microscopy revealed that, the synthesized particles are found to be 4-25 nm in size. Monodispersed and spherical nature of synthesized AgNPs were shown by scanning electron microscope and the presence of Ag in the AgNPs was confirmed by energy dispersive spectrum. The phytosynthesised AgNPs were evaluated for its antidiabetic activity in alloxan-induced diabetic rats. AgNPs-treated diabetic rats found to be significantly improved the dyslipidemic condition as seen in the diabetic control. Furthermore, it also reduced the blood glucose level over the period of treatment. The improvement in body weight was also found to be evidence for S. nigrum extract-mediated AgNPs as a potential antidiabetic agent against alloxaninduced diabetic rats.

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“…Subsequent electronphonon and hole-phonon scattering processes lead to energy loss and finally to PL recombination of an electron from an occupied sp band with a hole. 37 If we take into account the short wavelength of excitation (240 nm) used in this work, and that the peak of the luminescence spectrum of the metal nanoparticles is centered around the interband absorption edge, [38][39][40] we can propose two mechanisms to explain the increase in PL of Si QDs near the Ag NPs. The first mechanism is related to the enhancement of the excitation through the emission of Ag NPs centered around 250 nm, that could increase the creation of electron-hole pairs in the Si QDs and then their PL.…”

Section: Resultsmentioning

confidence: 99%

Enhancement and quenching of photoluminescence from silicon quantum dots by silver nanoparticles in a totally integrated configuration

et al. 2012

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In this study, Si QDs were formed inside silica matrix by implantation and annealing. Subsequent implantations with Ag+2 ions at different energies were performed in order to vary the distance between the previously formed Si QDs and newly aggregated Ag NPs. The coupling between them was observed through the PL energy and intensity from Si QDs. A PL enhancement is well evidenced at the lowest implantation energy (1 MeV), but at higher energies, a decrease in intensity (2 MeV) and a quenching (3 MeV) are observed

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Studies on surface plasmon resonance and photoluminescence of silver nanoparticles

Cited by 403 publications

References 26 publications

Green synthesis of silver nanoparticles mediated by Pulicaria glutinosa extract

Green synthesis of silver nanoparticles mediated by Pulicaria glutinosa extract

Synthesis and characterization of Solanum nigrum-mediated silver nanoparticles and its protective effect on alloxan-induced diabetic rats

Enhancement and quenching of photoluminescence from silicon quantum dots by silver nanoparticles in a totally integrated configuration

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