Synthesis and characterization of resorcinarene-encapsulated nanoparticles

被引：9

作者：

Wei, A ^{[1
]}

Stavens, KB ^{[1
]}

Pusztay, SV ^{[1
]}

Andres, RP ^{[1
]}

机构：

[1] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

来源：

NANOPHASE AND NANOCOMPOSITE MATERIALS III | 2000年 / 581卷

关键词：

D O I：

10.1557/PROC-581-59

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new strategy for stabilizing inorganic nanoparticles in nonpolar solutions is described. Resorcinarenes 1-3 were synthesized and evaluated as surfactants because of their large concave headgroups with multiple contact sites. Au nanoparticles ranging from 3-20 nm in diameter were generated in the vapor phase and dispersed into dilute hydrocarbon solutions of 1-3, where they were stabilized for up to several months. Chemisorption is most likely mediated by multiple Au-O interactions, as indicated by several control experiments and by surface-enhanced Raman spectroscopy. The resorcinarenes were readily displaced by dodecanethiol, which resulted in the precipitation of particles >5 nm as determined by absorption spectroscopy and transmission electron microscopy. This suggests that the mobility of the resorcinarene tailgroups are important for maintaining the larger nanoparticles in a dispersed state. Resorcinarene surfactants with stronger chemisorptive properties are currently being explored.

引用

页码：59 / 63

页数：5

共 29 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].