Growth of spindle-shaped gold nanoparticles in cetyltrimethylammonium bromide solutions

2009 ◽  
Vol 4 (3) ◽  
pp. 142-147 ◽  
Author(s):  
Z. Li ◽  
A. Gu
Keyword(s):  
Gold Nanoparticles ◽  
Cetyltrimethylammonium Bromide ◽  
Bromide Solutions

In Situ Reducing Synthesis of (CTAB+C18NH2)-Modified Hydrophobic Gold Nanoparticles at Room Temperature

2014 ◽  
Vol 618 ◽  
pp. 203-207
Author(s):  
Li Ping Chen
Keyword(s):  
Gold Nanoparticles ◽  
Cetyltrimethylammonium Bromide ◽  
Room Temperature ◽  
Microemulsion System ◽  
Mixed Surfactant ◽  
Gold Particles ◽  
Alkali Promotion

The hydrophobic gold nanoparticles with monodispersity are synthesized by using n-butanol reduction in situ under the condition of alkali promotion in cetyltrimethylammonium bromide (CTAB)/n-butanol/n-heptane/HAuCl4/NaOH(aq) W/O microemulsion at 30°C. The CTAB-stabilized gold nanoparticles are characterized by UV-vis, TEM , XRD and so on. The replacement of simple surfactant (CTAB ) with mixed surfactant CTAB/ octadecylamine can weaken the direction of CTAB to the growth of gold nanopartices and increase the monodispersity of gold nanoparticles. The effects of components of the microemulsion system on the shape, size and monodispersity of gold nanoparticles are also explored. The results show that the size of gold particles is changed by the amount of CTAB and C18NH2.

Synthesis and Properties of Monometallic and Bimetallic Silver and Gold Nanoparticles

2009 ◽  
Vol 1207 ◽  
Author(s):  
Xavier Enrique Guerrero Dib ◽  
Ubaldo Ortiz-Méndez ◽  
Selene Sepúlveda-Guzmán ◽  
Oxana Vasilievna Kharisova ◽  
Domingo Ferrer ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
High Resolution ◽  
Cetyltrimethylammonium Bromide ◽  
Bimetallic Nanoparticles ◽  
Spherical Shape ◽  
Metal Salts ◽  
Elemental Mapping ◽  
Actual Distribution ◽  
Successive Reduction

AbstractSynthesis of Au, Ag monometallic, and Au-Ag bimetallic nanoparticles have been synthesized by successive reduction of metal salts with ascorbic acid on prefabricated seeds in the presence of cetyltrimethylammonium bromide (C16H33)N(CH3)3Br (CTAB), as a cationic surfactant, is presented in this paper. This coverage method for the prefabricated seeds is uniform, although in some cases deviations from a spherical shape are observed with the formation of nanorods or nanoprisms. Results using high-resolution STEM-XEDS elemental mapping suggest that the actual distribution of the two metals within the multilayer spheres may involve partial alloying of the metals.

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