Graphene Arrested in Laponite-Water Colloidal Glass

被引：37

作者：

Alhassan, Saeed M. ^{[1
]}

Qutubuddin, Syed ^{[1
]}

Schiraldi, David A. ^{[2
]}

机构：

[1] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA

[2] Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 USA

来源：

LANGMUIR | 2012年 / 28卷 / 08期

关键词：

GRAPHITE; EXFOLIATION;

D O I：

10.1021/la204781e

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Graphene production in water from graphite sources is an important technological route toward harvesting the unique properties of this material. Graphene forms thermodynamically unstable dispersions in water, limiting the use of this solvent due to aggregation. We show that graphene-water dispersions can be controlled kinetically to produce graphene by using laponite clay. Laponite exhibits rapid gelation kinetics when dispersed in water above its gelation concentration, allowing graphene aggregation to be halted after exfoliation in water at ambient conditions. The transparency of laponite colloidal glass and films is important in examining the extent of graphene exfoliation.

引用

页码：4009 / 4015

页数：7

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