From my days as a college student, we were always encouraged to make our topics as specific as possible. An interesting topic you can tackle is the dependence of conductivity on particle size. It's a very new topic so if you tackle it well you may not need an experiment.
I think you should include his theory and even his history in order for your essay to be presentable. And you don't know later on your essay will be consider as the most academic essay around the world!