کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1504855 1511007 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of gold nanoparticles by reduction of HAuCl4 under UV irradiation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Synthesis of gold nanoparticles by reduction of HAuCl4 under UV irradiation
چکیده انگلیسی

Gold nanoparticles were prepared in surfactant solutions by reduction of HAuCl4 under UV irradiation without adding extra reductants or other organic substances. The effect of the structure and the property of surfactant on the size and the optical properties of prepared gold nanoparticles were studied. It was found that the longer the alkyl chain of the surfactant, the larger gold particles are obtained. On the other hand, lengthen the geminis spacer benefits the formation of smaller gold particles. The formation of adduct micelles composed of the charged surface active portion of the surfactant molecule and the (AuIIICl4)− ion in cationic surfactant solution serves as the gold source and favors the formation of gold particles with larger sizes. While the repulsion between the (AuIIICl4)− ion and the negative charged surface of anionic surfactant micelle is in favor of the formation of gold nanoparticles with smaller sizes. The nonionic surfactants can also assist the formation of dispersed gold nanoparticles.

Figure optionsDownload as PowerPoint slideHighlights
► The properties of surfactants determine the sizes of synthesized god nanoparticles.
► The surfactant act as soft template, controller of gold source as well as stabilizer.
► The adduct micelles favor the formation of gold nanoparticles with bigger sizes.
► The anionic surfactants can assist the formation of smaller gold nanoparticles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 15, January 2013, Pages 17–23
نویسندگان
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