Currently some researches are trying to use nanoantennas (infrared rectennas)
for energy harvesting.
http://newenergyandfuel.com/http:/ne...hould-be-huge/
They suppose to create tiny diodes for rectifying of currents.
Some people wonder if they are able to create diodes that work with such tiny and
high frequency currents why they need nanoantennas?Maybe it's easier to rectify
those thermal electron currents which exist in a heated body?
There is no wonder that you can't use thermal currents in diode which exist under room temperature.Otherwise it would be demon of Maxwell.To get some usefull energy temperature differences should exist somewhere in a system.I would be glad to know what kind of properties in diode we need to have to rectify thermal electrons?Should it be low forward voltage or high frequency or Schottky or some
other kind?