Probing Diffusion of Single Nanoparticles at Water-Oil Interfaces

被引：47

作者：

Wang, Dapeng ^{[1
]}

Yordanov, Stoyan ^{[1
]}

Paroor, Harsha Mohan ^{[1
]}

Mukhopadhyay, Ashis ^{[2
]}

Li, Christopher Y. ^{[3
]}

Butt, Hans-Juergen ^{[1
]}

Koynov, Kaloian ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[3] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

SMALL | 2011年 / 7卷 / 24期

关键词：

fluorescence correlation spectroscopy; nanoparticles; quantum dots; water-oil interfaces; interfacial diffusion; FLUORESCENCE CORRELATION SPECTROSCOPY; CAPILLARY FORCES; CROSS-LINKING; LIQUID; PARTICLES; VISCOSITY; TENSION; FLOW;

D O I：

10.1002/smll.201101823

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The diffusion of nanoparticles at a wateralkane interface is studied using fluorescence correlation spectroscopy. Hydrophilic and hydrophobic quantum dots of 5, 8, and 11 nm radius are used. A slow-down of nanoparticle diffusion at the liquidliquid interface is observed. The effect is most evident when the viscosities of both liquid phases are similar, here, at the waterdecane interface. In this case, the interfacial diffusion coefficients of the hydrophilic particles are 1.5 times and those of the hydrophobic particles 2 times lower than the corresponding bulk values.

引用

页码：3502 / 3507

页数：6

共 48 条

[1] Direct visual observation of thermal capillary waves [J].