Document Detail


Phytosynthesis of stable Au, Ag and Au-Ag alloy nanoparticles using J. Sambac leaves extract, and their enhanced antimicrobial activity in presence of organic antimicrobials.
MedLine Citation:
PMID:  25222319     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A green chemistry approach for the synthesis of Au, Ag and Au-Ag alloy nanoparticles (NPs) using the corresponding metal precursors and Jasminum sambac leaves extract as both reducing and capping media, under microwave irradiation, is reported. During the formation, as expected, the reaction mixture shows marginal decrease in pH and an increase in solution potential. The formation of NPs is evident from their surface plasmon resonance (SPR) peak observed at ∼555nm for Au, ∼435nm for Ag and ∼510nm for Au-Ag alloy. The XRD pattern shows fcc structure while the FTIR spectra indicate the presence of plant residues adsorbed on these NPs. Such a bio-capping of NPs is characterized by their weight loss, ∼35% due to thermal degradation of biomass, as observed in TG analysis. The colloidal dispersion of NPs is stable for about 6weeks. The near spherical shape of NPs (ϕ20-50nm) is observed by FE-SEM/TEM images and EDAX gives the expected elemental composition. Furthermore, these NPs showed enhanced antimicrobial activity (∼1-4-fold increase in zone of inhibition) in combination with antimicrobials against test strains. Thus, the phytosynthesized NPs could be used as effective growth inhibitors for various microorganisms.
Authors:
S Yallappa; J Manjanna; B L Dhananjaya
Related Documents :
7584629 - Absence of circadian variations in urinary porphyrin excretion in normal subjects.
19948509 - Symmetric dimethylarginine, an endogenous marker of glomerular filtration rate, and the...
25193289 - The effect of father's age in fertile, subfertile, and assisted reproductive technology...
25283279 - New species and taxonomic notes on anteros hübner, [1819] and ourocnemis bethune-baker,...
21901479 - Skin advanced glycation end-product accumulation is negatively associated with calcanea...
25304419 - National, regional, and global sex ratios of infant, child, and under-5 mortality and i...
22981679 - Coordination of the non-paretic leg during hemiparetic gait: expected and novel compens...
10886259 - Influence of body size and age on maximal systolic velocity of mitral annulus motion.
1230499 - Serum immunoglobulin levels in healthy adults of various ethnic groups in a rural famil...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-8-28
Journal Detail:
Title:  Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy     Volume:  137C     ISSN:  1873-3557     ISO Abbreviation:  Spectrochim Acta A Mol Biomol Spectrosc     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-9-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9602533     Medline TA:  Spectrochim Acta A Mol Biomol Spectrosc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  236-243     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier B.V. All rights reserved.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Novel porphyrin-daunomycin hybrids: Synthesis and preferential binding to G-quadruplexes over i-moti...
Next Document:  Novel axially carborane-cage substituted silicon phthalocyanine photosensitizer; synthesis, characte...