| Автор | Dang, Thi My Dung |
| Автор | Le, Thi Tuyet Thu |
| Автор | Fribourg-Blanc, Eric |
| Автор | Dang, Mau Chien |
| Дата выпуска | 2011-03-01 |
| dc.description | Copper nanoparticles, due to their interesting properties, low cost preparation and many potential applications in catalysis, cooling fluid or conductive inks, have attracted a lot of interest in recent years. In this study, copper nanoparticles were synthesized through the chemical reduction of copper sulfate with sodium borohydride in water without inert gas protection. In our synthesis route, ascorbic acid (natural vitamin C) was employed as a protective agent to prevent the nascent Cu nanoparticles from oxidation during the synthesis process and in storage. Polyethylene glycol (PEG) was added and worked both as a size controller and as a capping agent. Cu nanoparticles were characterized by Fourier transform infrared (FT-IR) spectroscopy to investigate the coordination between Cu nanoparticles and PEG. Transmission electron microscopy (TEM) and UV–vis spectrometry contributed to the analysis of size and optical properties of the nanoparticles, respectively. The average crystal sizes of the particles at room temperature were less than 10 nm. It was observed that the surface plasmon resonance phenomenon can be controlled during synthesis by varying the reaction time, pH, and relative ratio of copper sulfate to the surfactant. The surface plasmon resonance peak shifts from 561 to 572 nm, while the apparent color changes from red to black, which is partly related to the change in particle size. Upon oxidation, the color of the solution changes from red to violet and ultimately a blue solution appears. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2011 Vietnam Academy of Science & Technology |
| Название | Synthesis and optical properties of copper nanoparticles prepared by a chemical reduction method |
| Тип | paper |
| DOI | 10.1088/2043-6262/2/1/015009 |
| Electronic ISSN | 2043-6262 |
| Print ISSN | 2043-6254 |
| Журнал | Advances in Natural Sciences: Nanoscience and Nanotechnology |
| Том | 2 |
| Первая страница | 15009 |
| Последняя страница | 15014 |
| Аффилиация | Dang, Thi My Dung; Laboratory for Nanotechnology (LNT), Vietnam National University in Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam |
| Аффилиация | Le, Thi Tuyet Thu; Laboratory for Nanotechnology (LNT), Vietnam National University in Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam |
| Аффилиация | Fribourg-Blanc, Eric; CEA-LETI-MNATEC, 17, rue des Martyrs, 38054 Grenoble Cedex 9, France |
| Аффилиация | Dang, Mau Chien; Laboratory for Nanotechnology (LNT), Vietnam National University in Ho Chi Minh City, Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam |
| Выпуск | 1 |
