Journal
CHEMNANOMAT
Volume 1, Issue 6, Pages 438-444Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.201500070
Keywords
carbon dioxide; gas-induced switching; graphene; hybrid materials; reversible dispersibility
Categories
Funding
- National Natural Science Foundation of China [21273223]
- Postgraduate Degree Construction Project of Southwest University for Nationalities [2015XWD-S0703]
- Sichuan Province Applied Research Project [2014JY0159]
Ask authors/readers for more resources
The low dispersibility of graphene in water, given its hydrophobic nature, is considered a serious problem that limits its use. Here, we describe a method to stably disperse graphene using a dispersant containing a tertiary amine and a pyrene group. The dispersant modifies the graphene surface via pi-pi stacking, allowing it to be dispersed in water. The dispersant undergoes a hydrophobic-hydrophilic transition upon being stimulated by CO2 and N-2, exhibiting a faster response (reaction time of 1.5 min) and lower recovery temperature (40 degrees C) than those of compounds with amidine-like structures. We found that the graphene modified by this gas-sensitive dispersant exhibited reversible dispersion/aggregation behavior upon the bubbling/removal of CO2. The proposed method is a simple one for the reversible dispersion/aggregation of graphene by stimulating it with a gas and should be suitable for fabricating sensors, drug-delivery systems, smart surfaces, and switching devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available