I am running an experiment using graphene at the moment to create energy from different chemical solutions. A link to what I am building on is below:
Amazingly, this does actually work; it is possible to get intermittent pulses of voltage anywhere from 40mV to about 100mV with a period of a few tens of ms when a drop of solution is dropped onto a small sheet of graphene. The reason I say intermittent is that I am dropping the drops of solution intermittently onto the graphene itself, which would be analogous to a real world situation.
However, I am struggling to harness this voltage/energy.
I have tried to put different capacitors in series with the graphene sheet, such that the voltage pulses could be stored in this. However, I think what happens in this case is that as soon as a voltage pulse (presumably) goes into the capacitor, it is just leaked away completely back into the graphene sheet, which is effectively just a resistor when not generating small pulses.
The fact that the pulses are so small means that I can't use a diode. And I don't want to use a transistor switch if I can get away with it, because having to apply an external voltage to this circuit defeats the point of what I am trying to do.
Any comments much appreciated!