NBEXP0001

=NBEXP0001 Fabrication of freestanding graphene/TiO2 film ('solar paper')=

Aim
To fabricate a free-standing graphene/TiO2 composite film, similar to the 'graphene paper' that has been made in the past[1], but photoconductive.

Procedure
(Note: procedure is modelled from [1])

1. Make up 100mL each of the following solutions (in ethanol):
 * Solution || Graphene oxide (mg/ml) || TiO2 (mg/ml) ||
 * 1 || 15 || 3 ||
 * 2 || 6 || 3 ||
 * 3 || 3 || 3 ||
 * 4 || 3 || 6 ||
 * 5 || 3 || 15 ||

2. Irradiate samples under UV for 1 hour each in an air-tight 3-neck flask with argon bubbling and stirring. 3. Filter solutions through membrane. Allow to dry in air. 4. Peel films from membranes and store in petri dishes. 5. Characterise with the following: 4-probe resistivity measurements, UV-induced photocurrent measurement, IV curves, high-res SEM (top-down & profile views), Raman & possibly XRD.