thermodynamics - Perpetual motion machine of the second kind possible in nano technology?

First of all sorry for my English - it is not my native language.

During my engineering studies at the university the thermodynamics professor told us that the "second law of thermodynamics is not true for a low number of molecules".

At that time scientists were already talking about micro technologies where single molecules do some work. (Today such technologies already exist).

Now I'm wondering if a perpetual motion machine of the second kind (a machine gaining energy by cooling down the environment) would be possible in nanotechnology. As a result such microchips would lower the entropy of the universe.

I was thinking about the following theoretical experiment:

Brown's molecular movement was discovered by observing objects in fluids in amber stones. Due to Brown's molecular movement these objects are moving. The energy comes from the environmental heat. If the object was a small, very strong magnet and metallic parts are placed near the amber then the moving magnet should induce eddy currents in the metallic parts. This would mean that there is a heat energy flow from the amber to the metallic parts even if the metallic parts are warmer then the amber.

Now the question: Would such a device be possible in nanosystem technology or even microsystem technology?

(I already asked a physics professor who only said: "maybe".)