Analysis of the Efficiency of Surfactant-Mediated Stabilization Reactions of EGaln Nanodroplets

被引：72

作者：

Finkenauer, Lauren R. ^{[1
]}

Lu, Qingyun ^{[1
]}

Hakem, Ilhem F. ^{[1
]}

Majidi, Carmel ^{[2
]}

Bockstaller, Michael R. ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA

[2] Carnegie Mellon Univ, Dept Mech Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA

来源：

LANGMUIR | 2017年 / 33卷 / 38期

基金：

美国国家科学基金会;

关键词：

LIQUID; PARTICLE; NANOPARTICLES; SCATTERING;

D O I：

10.1021/acs.langmuir.7b01322

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A methodology based on light scattering and spectrophotometry was developed to evaluate the effect of organic surfactants on the size and yield of eutectic gallium/indium (EGaIn) nanodroplets formed in organic solvents by ultrasonication. The process was subsequently applied to systematically evaluate the role of headgroup chemistry as well as polar/apolar interactions of aliphatic surfactant systems on the efficiency of nanodroplet formation. Ethanol was found to be the most effective solvent medium in promoting the formation and stabilization of EGaIn nanodroplets. For the case of thiol-based surfactants in ethanol, the yield of nanodroplet formation increased with the number of carbon atoms in the aliphatic part. In the case of the most effective surfactant system-octadecanethiol-the nanodroplet yield increased by about 370% as compared to pristine ethanol. The rather low overall efficiency of the reaction process along with the incompatibility of surfactant-stabilized EGaIn nanodroplets in nonpolar organic solvents suggests that the stabilization mechanism differs from the established self-assembled monolayer formation process that has been widely observed in nanoparticle formation.

引用

页码：9703 / 9710

页数：8

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