Preparation of silver nanorods through the control of temperature and pH of reaction medium

Autor:	Seung-Il Shin, Seong-Geun Oh, Young-Chai Kim, Gil-Jae Lee
Rok vydání:	2004
Předmět:	Materials science Aqueous solution Inorganic chemistry Halide Condensed Matter Physics Ascorbic acid Silver nanoparticle Metal chemistry.chemical_compound Sodium borohydride chemistry Bromide visual_art visual_art.visual_art_medium General Materials Science Nanorod Nuclear chemistry
Zdroj:	Materials Chemistry and Physics. 84:197-204
ISSN:	0254-0584
DOI:	10.1016/j.matchemphys.2003.11.024
Popis:	Silver nanorods were prepared by seed-mediated growth method, following the procedures recently described by Jana et al. In seed-mediated growth method, small metal particles are prepared first and later used as seeds for the preparation of nanorods. The silver seeds were prepared by reduction of silver ions with sodium borohydride in the presence of sodium citrate dihydrate as stabilizer. These silver seeds were added into the solution containing more silver salt, an ascorbic acid (weak reducing agent) and a cetyltrimethylammonium bromide (CTAB). The effects of temperature and pH of solution on the morphology and uniformity of silver nanorods were investigated by UV-Vis spectroscopy, transmission electron microscopy (TEM). Increase of reaction temperature and pH led to a decrease of aspect ratio of silver nanorods and an increase of monodispersity. Also gold nanoshells have been synthesized by reacting aqueous HAuCl4 solutions with silver nanorods as solid templates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cd6fc017b3269adb946b79be3f6208dc https://doi.org/10.1016/j.matchemphys.2003.11.024 Zobrazit plný text záznamu Full Text from ScienceDirect