Directing Substrate Morphology via Self-Assembly: Ligand-Mediated Scission of Gallium-Indium Microspheres to the Nanoscale

被引：291

作者：

Hohman, J. Nathan ^{[1
,2
,3
]}

Kim, Moonhee ^{[1
,2
]}

Wadsworth, Garrett A. ^{[1
,2
,4
]}

Bednar, Heidi R. ^{[1
,2
]}

Jiang, Jun ^{[1
,2
,5
]}

LeThai, Mya A. ^{[1
,2
]}

Weiss, Paul S. ^{[1
,2
,3
,4
]}

机构：

[1] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[3] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

[4] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[5] Dickinson Coll, Dept Chem, Carlisle, PA 17013 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 12期

基金：

美国国家科学基金会;

关键词：

Gallium; indium; alloy; liquid metal; self-assembled monolayer; nanoparticle; alkanethiol; ultrasound; sonication; hydrogen bonding; BARE SEMICONDUCTOR SURFACES; MONOLAYERS; NANOPARTICLES; CHEMISTRY; AU(111); SHELL; CORE; NANOCRYSTALS; DISULFIDES; SIMULATION;

D O I：

10.1021/nl202728j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have developed a facile method for the construction of liquid-phase eutectic gallium-indium (EGaIn) alloy nanoparticles. Particle formation is directed by molecular self-assembly and assisted by sonication. As the bulk liquid alloy is ultrasonically dispersed, fast thiolate self-assembly at the EGaIn interface protects the material against oxidation. The choice of self-assembled monolayer ligand directs the ultimate size reduction in the material; strongly interacting molecules induce surface strain and assist particle cleavage to the nanoscale. Transmission electron microscopy images and diffraction analyses reveal that the nanoscale particles are in an amorphous or liquid phase, with no observed faceting. The particles exhibit strong absorption in the ultraviolet (similar to 200 nm), consistent with the gallium surface plasmon resonance, but dependent on the nature of the particle ligand shell.

引用

页码：5104 / 5110

页数：7

共 72 条

[1] Applications of Ultrasound to the Synthesis of Nanostructured Materials [J].