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Silver Seeds and Aromatic Surfactants Facilitate the Growth of Anisotropic Metal Nanoparticles: Gold Triangular Nanoprisms and Ultrathin Nanowires

Title
Silver Seeds and Aromatic Surfactants Facilitate the Growth of Anisotropic Metal Nanoparticles: Gold Triangular Nanoprisms and Ultrathin Nanowires
Authors
Qian, ZhaoxiaPark, So-Jung
Ewha Authors
박소정
SCOPUS Author ID
박소정scopus
Issue Date
2014
Journal Title
CHEMISTRY OF MATERIALS
ISSN
0897-4756JCR Link1520-5002JCR Link
Citation
vol. 26, no. 21, pp. 6172 - 6177
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
Here, we report that the introduction of silver seeds can lead to fast and high-yield syntheses of two highly anisotropic metal nanoparticles: triangular gold nanoprisms and ultrathin metal nanowires. Uniform sub-50 nm gold triangular nanoprisms were formed in high yields when silver seeds were introduced to the growth solution containing a small amount of silver ions and an aromatic surfactant, benzyldimethylhexadecylammonium chloride. On the other hand, gold seeds grew into spherical particles under the same condition. The formation of gold triangular nanoprisms from silver seeds was attributed to a relatively more reactive nature of silver seeds, which allows for the necessary structure evolution at the initial stage of nanoparticle growth. At high silver ion concentrations, ultrathin nanowires with the diameter of 1.6 nm were formed in nearly 100% yield. While both seeds (gold and silver) produced the same type of nanowires, silver seeds significantly facilitated the formation of nanowires, and the nanowire growth was almost instantaneous with silver seeds. We believe that the use of silver seeds in combination with aromatic surfactants can open up new possibilities for shape control of metal nanoparticles.
DOI
10.1021/cm502494m
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자연과학대학 > 화학·나노과학전공 > Journal papers
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