کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1489939 992314 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extracellular synthesis of silver nanoparticles using the leaf extract of Coleus amboinicus Lour.
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Extracellular synthesis of silver nanoparticles using the leaf extract of Coleus amboinicus Lour.
چکیده انگلیسی

In the present investigation, Coleus amboinicus Lour. leaf extract-mediated green chemistry approach for the synthesis of silver nanoparticles was described. The nanoparticles were characterized by ultraviolet–visible (UV–Vis) spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The influence of leaf extract on the control of size and shape of silver nanoparticles is reported. Upon an increase in the concentration of leaf extract, there was a shift in the shape of nanoparticles from anisotrophic nanostructures like triangle, decahedral and hexagonal to isotrophic spherical nanoparticles. Crystalline nature of fcc structured nanoparticles was confirmed by XRD spectrum with peaks corresponding to (1 1 1), (2 0 0), (2 2 0) and (3 1 1) planes and bright circular spots in the selected-area electron diffraction (SAED). Such environment friendly and sustainable methods are non-toxic, cheap and alternative to hazardous chemical procedures.

Figure optionsDownload as PowerPoint slideHighlights
► Synthesis of AgNPs using the leaf extract of Coleus amboinicus L. was described.
► UV–vis absorption spectra showed the formation of isotrophic AgNPs at 437 nm in 6 h.
► XRD analysis showed intense peaks corresponding to fcc structure of AgNPs.
► HR-TEM analysis revealed the formation of stable anisotrophic and isotrophic AgNPs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 46, Issue 10, October 2011, Pages 1708–1713
نویسندگان
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