Synthesis and characterization of Ag nanoparticles in silica matrix by atom beam sputtering

Mishra, Yogendra Kumar; Mohapatra, Satyabrata; Kabiraj, D.; Mohanta, Bidhan; Lalla, N. P.; Pivin, J.C.; Avasthi, D.K.

doi:10.1016/j.scriptamat.2006.12.008

Cited by 136 publications

(77 citation statements)

References 18 publications

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“…The spectrum of activity is very wide and the development of resistance relatively law (Cooper 2004). The use of plant extracts is effective against various microorganisms including plant pathogens (Mishra et al 2007).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

et al. 2014

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The use of different parts of plants for the synthesis of nanoparticles is considered as a green technology as it does not involve any harmful chemicals. Herein, we report on rapid biosynthesis of silver nanoparticles (SNPs) from aqueous stem bark extract of Cochlospermum religiosum a medicinal plant. The reduced silver nanoparticles were characterized by using UV-Visible spectroscopy (UV-Vis), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis, atomic force microscopy, and Fourier transform infrared (FT-IR). The UV-Visible spectrum of the aqueous medium containing silver nanoparticles showed an absorption peak at around 445 nm, XRD showed that the particles are crystalline in nature, with a face-centered cubic structure and the SEM images showed that the spherical-shaped silver nanoparticles were observed and the size range was found to be 20-35 nm. FT-IR spectroscopy analysis revealed that carbohydrate, polyphenols, and protein molecules were involved in the synthesis and capping of silver nanoparticles. These phytosynthesized SNPs were tested for their antimicrobial activity and it analyzed by measuring the inhibitory zone. Cochlospermum religiosum aqueous stem bark extract of SNPs showed highest toxicity to Staphylococcus followed by Pseudomonas, Escherichia coli and Bacillus and lowest toxicity towards Proteus. Whereas in fungal species highest inhibition zone against Aspergillus flavus followed by Rhizopus, Fusarium, and Curvularia, and minimum inhibition zone was observed against Aspergillus niger species. The outcome of this study could be useful for the development of value added products from indigenous medicinal plants of India for nanotechnology-based biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

et al. 2014

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“…Owing to their unique physical and chemical properties, they are widely used in various areas of science and technology, such as surface-enhanced Raman spectroscopy [3], catalysts [4], anti-bacterial materials [5], sensors [6], lubricating materials [7], and so on, with exponentially increasing production. As the properties of Ag NPs depend on their sizes, up to now, various methods, such as spray pyrolysis synthesis [8], microwave irradiation synthesis [9], DC arc thermal plasma synthesis [10], chemical synthesis [11], hydrothermal synthesis [12], UV irradiation synthesis [13], sonochemical synthesis [14], laser ablation synthesis [15], thermal decomposition synthesis [16], atom beam-sputtering synthesis [17], and so forth, have been employed to prepare Ag NPs with different sizes and shapes.…”

Section: Introductionmentioning

confidence: 99%

Characterization and optical studies of PVP-capped silver nanoparticles

et al. 2016

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In this study, the size-controlled synthesis of silver nanoparticles (Ag NPs) via chemical reduction method by NaBH 4 as a reducing agent and poly(vinyl pyrrolidone) or PVP as a stabilizing agent is reported. Changing of ratios between reducing agent and stabilizing agent relative to AgNO 3 -optimized conditions for synthesis of stable Ag NPs was studied. The formation of Ag NPs was tracked by UV-Vis spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy. Particle size distribution was studied by particle size analyzer, and the morphology was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The optical properties of the synthesized Ag NPs were also investigated. The optimized Ag NPs were very stable even after 1 month that was due to effective stabilization by PVP molecules. The mechanism of Ag NPs formation and stabilization is discussed in detail.

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“…The presence of SPR band signifies enhanced capacity of absorption of a matrix material. That incorporation of noble metal nanoparticles (Au, Ag, and Cu) in a matrix material leads to higher degree of absorption of light is well documented in literature [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

et al. 2017

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Cu-C 60 nanocomposite thin films are synthesized by co-deposition restive heating method on glass, silicon, and TEM grid substrates. Rutherford backscattering spectroscopy (RBS) analysis is used for determining the composition of Cu and thickness of thin film which one found to be ∼13 at% and ∼28 nm, respectively. The deposited thin films are irradiated with 100 keV Ag ion at different fluences ranging from 1 × 10 14 to 3 × 10 16 ions/cm 2 . Being of low energy, Ag ions got implanted in SiO 2 substrate up to a depth of 30-40 nm that results in wide surface plasmon resonance (SPR) band in combination with SPR of Cu nanoparticles. UVvisible absorption spectroscopy demonstrates the SPR peak arises due to copper nanoparticles embedded in fullerene C 60 matrix on irradiation of nanocomposite thin film and its variation under implantation of Ag nanoparticles in SiO 2 substrate. Structural modifications due to ion irradiation are analyzed by Raman and transmission electron microscopy (TEM). Raman spectroscopy study reveals the transformation of fullerene C 60 into amorphous carbon (a-C) with increasing fluence. Variation in particle distribution is observed under TEM. The average particle sizes are found to be ∼4 ± 0.7 and ∼6 ± 0.4 nm for pristine and 100 keV Ag ion-irradiated thin films, respectively. Atomic force microscopy (AFM) confirms the increase in grain size with increase in roughness of nanocomposite thin films under the effect of implantation. Xray photoelectron spectroscopy (XPS) confirms the presence of Cu and C from their chemical bonding in Cu-C 60 nanocomposite thin films.

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Synthesis and characterization of Ag nanoparticles in silica matrix by atom beam sputtering

Cited by 136 publications

References 18 publications

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

Synthesis of silver nanoparticles from stem bark of Cochlospermum religiosum (L.) Alston: an important medicinal plant and evaluation of their antimicrobial efficacy

Characterization and optical studies of PVP-capped silver nanoparticles

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

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