You can use conducting gels lik silver gels or inks
for the electrical connections particularly for the
outside world.

Regards

Bala.

--- jpt sharma  wrote:

> Hi Guys
>   I am trying to make an electrical contacts (four
> probe measurent) on  organic samples. I am thinking
> to make chips with Pt and use FIB to  make
> electrical contact. I can't use the lithography
> because the  organic samples dissolve on Acetone.
>   anyone has better idea?