کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329158 978889 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation of gold and silver nanostructures within polyvinylpyrollidone (PVP) gel
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Formation of gold and silver nanostructures within polyvinylpyrollidone (PVP) gel
چکیده انگلیسی

Study on reduction of Au(III) and Ag(I) and the formation of Au and Ag nanostructures was performed on the gels of metal precursor and PVP polymer mixture. Some comparing samples were prepared for better understanding the role of reactants on the reduction of metal ions and further growth of nanocrystals. The results suggest that, in addition to its function of generating stable colloids, PVP not only has a reducing effect on metal ions, but also acts as a crystal growth modifier. At low temperatures, the reducing effect of PVP is strong on Ag(I) ions in AgNO3, while the reduction of complex Au(III) ions in HAuCl4 is slow, involving two steps of Au(III)→Au(I)→Au. In the study of temperature disturbance on crystal growth, Au nanoplates of new and well-defined star shape were observed. The differences in the size and shape of nanoparticles are discussed from the colloid chemistry.

If a temperature difference was introduced to the gel of Au3+(H2O)-PVP, large sized Au nanoplates with new and well-defined star shape were observed.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 183, Issue 4, April 2010, Pages 858–865
نویسندگان
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