کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5142294 1496023 2017 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Extracellular bio-synthesis of silver nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Extracellular bio-synthesis of silver nanoparticles
چکیده انگلیسی
The effect of cetyltrimethylammonium bromide, CTAB has been studied on the optical properties and morphology of advanced Ag-nanoparticles (AgNPs) using Oriental plane leaves extract as a reducing-, stabilizing- and capping-agent for the first time. The formation of Ag-nanodisks was monitored by measuring the UV-vis spectra at different time intervals (5, 10, 20 and 30 min) after adding the leaves extract (from 1 to 5 cm3) to the different AgNO3 solutions ([Ag+] = 4.0, 8.0, 12.0, 16.0 × 10−4 mol dm−3). The sigmoidal nature of the reaction-time plots suggests the involvements of an autocatalytic reaction path. In the presence of CTAB, the peak at 450 nm is shifted to shorter wavelength, i.e., 425 nm and sharpness of the surface resonance plasmon (SRP) band also decreases. The results confirm a significant change in the morphology and/or agglomeration tendency with CTAB. Transmission electron microscopy (TEM) results show the formation of stable AgNPs at different concentration of AgNO3 gives mostly spherical particles with diameter ranging from 10 to 30 nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arabian Journal of Chemistry - Volume 10, Issue 2, February 2017, Pages 226-231
نویسندگان
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