Green Synthesis Of Silver Nanoparticles Using Asiatic Pennywort And Bryophyllum Leaves Extract And Their Antimicrobial Activity

Saikia, Dulen; Gogoi, P. K.; Phukan, Pallabi; Bhuyan, Nilave; Borchetia, Sangeeta; Saikia, Jibon

doi:10.5185/amlett.2015.5655

Cited by 18 publications

(13 citation statements)

References 1 publication

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“…This was well proved by the decrease in the diffraction intensity from the crystalline PVA. Similar work has been reported in literature for PVA based hybrid thin film [23]. The observed a large peak that demonstrates the major nanostructure of the films, while small narrow peaks are a proof for minor microcrystalline in the film matrix.…”

Section: 2supporting

confidence: 89%

Hybrid Pva-In2o3 Nano Thin Film for Transparent Optical Devices

2017

IJAERD

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Section: 2supporting

confidence: 89%

Hybrid Pva-In2o3 Nano Thin Film for Transparent Optical Devices

2017

IJAERD

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“…(2008) . The observed large peak demonstrates the major nanostructure of the films, while the small narrow peaks are a proof for minor microcrystalline in the film matrix . The missing and additional peaks observed in the XRD pattern of hybrid PVA‐InTiO thin films clearly indicate the interaction and entry of the metal oxide nano particles into polymer matrix.…”

Section: Resultsmentioning

confidence: 97%

“…Figure a to d shows the XRD patterns of as grown and annealed hybrid PVA‐InTiO thin films. The XRD pattern showed main crystalline characteristic peaks at around 2 θ = 27°, 36°, 41°, and 54° corresponding to (110), (101), (111), and (211) planes of rutile TiO 2 and the peaks at 2 θ = 30°, 33°, 36°, 45°, 51°, and 60°, respectively, corresponding to (211), (222), (400), (431), (440), and (622) planes of cubic In 2 O 3 . The XRD patterns of as grown and annealed films exhibit the presence of broad hump (amorphous hallows) centered at around 23° because of the diffused scattering of amorphous PVA matrix.…”

Section: Resultsmentioning

confidence: 97%

“…The interaction may be attributed to the tendency to form coordination compound between Ti 4+ and In 3+ in PVA. The complexation of PVA chains with In 2 O 3 and TiO 2 would lead to a decrease in the intermolecular interaction between the PVA chains and thus the crystalline degree . The hybrid thin films showed the improved intensity of the diffraction peaks because of incorporation of metal oxides.…”

Section: Resultsmentioning

confidence: 99%

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New transparent PVA‐InTiO hybrid thin films: influence of InTiO on the structure, morphology, optical, and dielectric properties

Sathish¹,

Bellan²,

Manandhar

et al. 2015

Polymers for Advanced Techs

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New hybrid Poly (vinyl) alcohol (PVA)-InTiO transparent thin film was prepared by dip-coating method. Characteristic of M-O vibrations (In-O and Ti-O) were confirmed from Fourier transform infrared spectroscopy. The X-ray diffraction patterns revealed that the mixed phases of rutile TiO 2 and cubic In 2 O 3 were present in the hybrid film. Scanning electron microscopy images showed spherical shape mixed In 2 O 3 and TiO 2 nano particles embedded in the polymer matrix. The presence of elements such as In, Ti, and O are confirmed from energy dispersive X-ray spectroscopy. High transmittance (80%) and wide band gap energy (4.1 to 3.75 eV) values were observed from optical study. High dielectric constant (18 to 23) and low dielectric loss values were obtained from dielectric study. The observed amorphous nature, enhanced optical, and dielectric properties indicated that the hybrid thin film could be used as high-к layer in transparent thin film transistor and in opto-electronic device applications in near future.

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“…Leela and Vivekanandan (2008) suggested the presence of Ag o nanoparticles in their publication; however, the XRD pattern does not correspond to the Ag°nanoparticle. In the presence of Asiatic Pennywort and Bryophyllum leaf extracts, the formation of Ag°nanoparticles was wrongly assigned by XRD technique, and the presence of AgCl nanoparticles was ignored (Saikia et al 2015). Subarani et al (2013) reported the formation of Ag o nanoparticles from Vinca rosea (L.) (Catharanthus roseus); however, some silver oxides probably contaminated nanostructure, as revealed by XRD analysis.…”

Section: Plantsmentioning

confidence: 98%

Antimicrobial activity of biogenic silver nanoparticles, and silver chloride nanoparticles: an overview and comments

Durán

Nakazato

Seabra

2016

Appl Microbiol Biotechnol

258

127

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The antimicrobial impact of biogenic-synthesized silver-based nanoparticles has been the focus of increasing interest. As the antimicrobial activity of nanoparticles is highly dependent on their size and surface, the complete and adequate characterization of the nanoparticle is important. This review discusses the characterization and antimicrobial activity of biogenic synthesized silver nanoparticles and silver chloride nanoparticles. By revising the literature, there is confusion in the characterization of these two silver-based nanoparticles, which consequently affects the conclusion regarding to their antimicrobial activities. This review critically analyzes recent publications on the synthesis of biogenic silver nanoparticles and silver chloride nanoparticles by attempting to correlate the characterization of the nanoparticles with their antimicrobial activity. It was difficult to correlate the size of biogenic nanoparticles with their antimicrobial activity, since different techniques are employed for the characterization. Biogenic synthesized silver-based nanoparticles are not completely characterized, particularly the nature of capped proteins covering the nanomaterials. Moreover, the antimicrobial activity of theses nanoparticles is assayed by using different protocols and strains, which difficult the comparison among the published papers. It is important to select some bacteria as standards, by following international foundations (Pharmaceutical Microbiology Manual) and use the minimal inhibitory concentration by broth microdilution assays from Clinical and Laboratory Standards Institute, which is the most common assay used in antibiotic ones. Therefore, we conclude that to have relevant results on antimicrobial effects of biogenic silver-based nanoparticles, it is necessary to have a complete and adequate characterization of these nanostructures, followed by standard methodology in microbiology protocols.

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Green Synthesis Of Silver Nanoparticles Using Asiatic Pennywort And Bryophyllum Leaves Extract And Their Antimicrobial Activity

Cited by 18 publications

References 1 publication

Hybrid Pva-In2o3 Nano Thin Film for Transparent Optical Devices

Hybrid Pva-In2o3 Nano Thin Film for Transparent Optical Devices

New transparent PVA‐InTiO hybrid thin films: influence of InTiO on the structure, morphology, optical, and dielectric properties

Antimicrobial activity of biogenic silver nanoparticles, and silver chloride nanoparticles: an overview and comments

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