Self-assembling of gold nanoparticles in one, two, and three dimensions

被引:49
作者
Gutiérrez-Wing, C
Santiago, P
Ascencio, JA
Camacho, A
José-Yacamán, M
机构
[1] Inst Nacl Invest Nucl Amsterdam, Mexico City 06100, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2000年 / 71卷 / 03期
关键词
D O I
10.1007/s003390000522
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the present work, we report the growth of ordered arrays of gold nanoparticles passivated with n-alkylthiol molecules using crystallization in toluene vapor. We kept constant the average particle size and the length of the passivating molecule (1-dodecanethiol). The temperature and time of growth were varied. We show that in the initial stages of the growth, nano-chains of particles are produced. These nano-chains aggregate to form two-dimensional arrays. In the initial stages the nano-chains form a two-dimensional square lattice which then relaxes to a close-packed structure. In latter stages of growth a three-dimensional supercrystal is produced. It is found that the packing of nanoparticles corresponds to an average FCC lattice. However, large variations on the local parameters of the lattice are observed, Near the edges of the supercrystal the anomalous packing reported by Zanchet et al. [20] and Fink et al. [21] was observed. The energy of the observed structures is analyzed using molecular dynamics simulation. It is concluded that using the vapor growth method, it is possible to produce controlled ordered structures from one to three dimensions.
引用
收藏
页码:237 / 243
页数:7
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