Liquid phase exfoliation (LPE) is a common technology used for graphene synthesis, however, the optimization of liquid suspension medium remains challenging. Here, the authors report a combination of ammonia (NH3) as an easily removable additive together with low boiling point organic-water co-solvent mixtures as suspension media to achieve high-concentration and long-term stable graphene suspensions by LPE, reaching current benchmark graphene concentration values of ~180 mg·L-1.
- Martin Nastran
- Paul Peschek
- Bernhard C. Bayer
