کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1648294 1517324 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transformation of randomly aggregated gold nanoparticles into dendritic structures by square wave potential pulses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Transformation of randomly aggregated gold nanoparticles into dendritic structures by square wave potential pulses
چکیده انگلیسی

Dendritic gold was facilely fabricated here via a simple two-step method by treating a pure gold electrode sequentially in two blank solutions for very short periods of time. The electrode surface was firstly roughened in 2 M HCl by a step potential for 50 s to form a three-dimensional (3D) nanoporous film consisting of randomly aggregated gold nanoparticles, and was then treated with square wave potential pulses for 500 s in 2 M H2SO4 to fulfill the transformation of the aggregated nanoparticles into dendritic structures. The influence of potential range, square wave frequency, electrolyte, and potential waves on the dendrite formation was investigated. A one-step method was also explored for mechanism comparison by treating the polished gold instead in the presence or absence of HAuCl4.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 65, Issues 15–16, August 2011, Pages 2326–2329
نویسندگان
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