i have carbon screen printed electrode and gold nano particles suspension in citrate buffer, how to deposit the particles on the electrode in a way to get uniform distribution?
You may can spray the nanoparticle suspension on carbon printed electrode, and then keep drying in air. If you further want to remove organic surfactants in suspension, which coverd Au Nps, you may heat your sprayed electrode at 250 or 300 oC for 1h in inert environment (N2 or Ar gas).