Biogenic nano-scale silver particles by Tephrosia purpurea leaf extract and their inborn antimicrobial activity

被引：169

作者：

Ajitha, B. ^{[1
]}

Reddy, Y. Ashok Kumar ^{[1
]}

Reddy, P. Sreedhara ^{[1
]}

机构：

[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2014年 / 121卷

关键词：

Green route; Silver nanoparticles; Tephrosia purpurea; Leaf extract; Surface plasmon resonance; Antimicrobial activity; GREEN SYNTHESIS; ANTIBACTERIAL PROPERTIES; NANOPARTICLES; FLAVONOIDS; SIZE; COLLOIDS; AG;

D O I：

10.1016/j.saa.2013.10.077

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this paper we report the green synthesis of silver nanoparticles (Ag NPs) using Tephrosia purpurea leaf extract. The biomolecules present in the leaf extract are responsible for the formation of Ag NPs and they found to play dual role of both reducing as well as capping agents. The high crystallinity of Ag NPs is evident from bright circular spot array of SAED pattern and diffraction peaks in XRD profile. The synthesized Ag NPs are found to be nearly spherical ones with size approximately similar to 20 nm. FTIR spectrum evidences the presence of different functional groups of biomolecules participated in encapsulating Ag NPs and the possible mechanism of Ag NPs formation was also suggested. Appearance of yellow color and surface plasmon resonance (SPR) peak at 425 nm confirms the Ag NPs formation. PL spectra showed decrement in luminescence intensity at higher excitation wavelengths. Antimicrobial activity of Ag NPs showed better inhibitory activity towards Pseudomonas spp. and Penicillium spp. compared to other test pathogens using standard Kirby-Bauer disc diffusion assay. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：164 / 172

页数：9

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