Monodisperse titania microspheres via controlled nanoparticle aggregation

被引：8

作者：

Schunk, Daniel ^{[1
]}

Hardt, Sebastian ^{[2
]}

Wiggers, Hartmut ^{[2
]}

Marlow, Frank ^{[1
]}

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

[2] Univ Duisburg Essen, Inst Combust & Gas Dynam, D-47048 Duisburg, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 20期

关键词：

MICROFLUIDIC DEVICE; PARTICLES; EMULSIONS; ARRAYS; GEL;

D O I：

10.1039/c2cp40658f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper describes the fabrication of highly monodisperse TiO2 nanoparticle aggregates (NPAs) by controlled aggregation of nanoparticles in a water-in-oil emulsion. Equally sized drops containing a titanium dioxide nanoparticle suspension are produced in a T-channel device. This procedure has a high tuning potential. Increasing the velocity of the titania suspension phase leads to an enlargement of the droplets, while raising the velocity of the oil phase reduces the drop diameter. The technique enables the preparation of monodisperse (<2%) drops between 150 and 400 mm in diameter. Evaporation of the suspension medium leads to nanoparticle aggregates. There is no significant change in dispersity from emulsion drops to NPAs, if the drying is carried out slowly.

引用

页码：7490 / 7496

页数：7

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