کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
595492 1454013 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and surface plasmon behavior of Cu nanoparticles using different stabilizers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Structural and surface plasmon behavior of Cu nanoparticles using different stabilizers
چکیده انگلیسی

Copper nanoparticles (CuNPs) are prepared in aqueous medium with hydrazine hydrate as the reductant. Different stabilizers PVA, PVP and starch are considered. For each stabilizing agent, the effect of concentration of NaOH on the synthesis of CuNPs is investigated. The structural characterization of CuNPs dispersed in aqueous medium has been done with the help of small angle X-ray scattering (SAXS). The SAXS studies demonstrate the formation of spherical NPs with bimodal size distribution. The primary (smaller) particles/clusters aggregate to form the larger nanoparticles. The scattered intensity after Guinier regime displays fractal behavior. An attempt has been made to understand the effect of stabilizer and NaOH concentration on the formation of such fractal aggregates. Correlations have been drawn between the particles size distribution in the sol and the localized surface plasmon resonance (LSPR) behavior of such CuNPs in aqueous solution. Dominance of smaller nanoparticles (∼5 nm or less) in the sol leads to suppression of the LSPR.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 359, Issues 1–3, 20 April 2010, Pages 88–94
نویسندگان
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