Seed-Mediated Growth of Gold Nanorods: Limits of Length to Diameter Ratio Control
نویسندگان
چکیده
منابع مشابه
Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method
A method is used for preparing gold NRs with aspect ratios ranging from 1.5 to 10 for which the surface plasmon absorption maxima are between 600 and 1300 nm. This method has been adapted from a previously published seed-mediated growth method (Jana et al. Adv. Mater. 2001, 13, 1389). The disadvantages and limitations of the earlier method (i.e., formation of noncylindrical NRs, φ-shaped partic...
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Gold nanorods were prepared via a seed-mediated sequential growth process involving the use of citratestabilised seed crystals and their subsequent growth in a series of reaction solutions containing [AuCl4] , ascorbic acid and the cationic surfactant cetyltrimethylammonuim bromide (CTAB). Electron diffraction analysis and HRTEM images of mature nanorods showed superpositions of two specific pa...
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While great success has been achieved in fine-tuning the aspect ratios and thereby the plasmon resonances of cylindrical Au nanorods, facet control with atomic level precision on the highly curved nanorod surfaces has long been a significantly more challenging task. The intrinsic structural complexity and lack of precise facet control of the nanorod surfaces remain the major obstacles for the a...
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This work describes properties of gold nanorods synthesized using a seed-mediated method. Gold salt is first reduced using a strong reducing agent which is NaBH4 to produce seed particles. In the presence of cetyltrimethylammonium bromide (CTAB) as a surfactant, subsequent reduction of more metal salt with a weak reducing agent (ascorbic acid) formed gold nanorods. Several parameters are invest...
متن کاملSulfide-Arrested Growth of Gold Nanorods.
The growth of gold nanorods can be arrested at intermediate stages by treatment with Na(2)S, providing greater control over their optical resonances. Nanorods prepared by the seeded reduction of AuCl(4) in aqueous cetyltrimethylammonium bromide solutions in the presence of AgNO(3) typically exhibit a gradual blueshift in longitudinal plasmon resonance, over a period of hours to days. This "opti...
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ژورنال
عنوان ژورنال: Journal of Nanomaterials
سال: 2014
ISSN: 1687-4110,1687-4129
DOI: 10.1155/2014/765618