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Thermal and aqueous stability improvement of graphene oxide enhanced diphenylalanine nanocomposites

2017-02, Ryan, Kate, Neumayer, Sabine M., Maraka, Harsha Vardhan R., Buchete, Nicolae-Viorel, Kholkin, Andrei L., Rice, James H., Rodriguez, Brian J.

Nanocomposites of diphenylalanine (FF) and carbon based materials provide an opportunity to overcome drawbacks associated with using FF micro- and nanostructures in nanobiotechnology applications, in particular, their poor structural stability in liquid solutions. In this study, FF/graphene oxide (GO) composites were found to self-assemble into layered micro- and nanostructures, which exhibited improved thermal and aqueous stability. Dependent on the FF/GO ratio, the solubility of these structures was reduced to 35.65% after 30 min as compared to 92.4% for pure FF samples. Such functional nanocomposites may extend the use of FF structures to, e.g., biosensing, electrochemical, electromechanical or electronic applications.