Kinetics of silver nanoparticle growth in aqueous polymer solutions: 1st Nano Update

Loại tài liệu:

Article

Tác giả:

Khan, Z.

Đề mục:

Arabian Journal of Chemistry

Nhà xuất bản:

Elsevier Ltd.

Ngày xuất bản:

October 2012

Định dạng:

pdf

Nguồn gốc:

Arabian Journal of Chemistry, Volume 5, Issue 4, October 2012, Pages 453-459

Ngôn ngữ:

eng

Lượt xem:

Lượt tải:

Nội dung

In this paper we report the effect of poly(vinyl alcohol) (PVA) on the silver nanoparticles formation of different morphologies by using silver nitrate and citric acid as the oxidant and reductant, respectively, for the first time. Our transmission electron microscopy (TEM) results suggest that the presence of PVA has significant impact on the size, shape, and the size distribution of the silver nanoparticles. The reaction follows a zero-order kinetics in [citric acid] as well as in [silver(I)] in the absence and presence of PVA. It was found that PVA and cetyltrimethylammonium bromide (CTAB) concentrations show no significant effects on the rate of CTAB-stabilized silver nanoparticles formation, whereas in presence of PVA, the reaction rate increases with (CTAB). Both spectrophotometric and TEM measurement demonstrated that the orange silver sol consists of aggregates, whereas the purple sol does not contain the aggregated arrangement. On the basis of various observations, the most plausible mechanism has been envisaged.

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Kinetics of silver nanoparticle growth in aqueous polymer solutions: 1st Nano Update

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