  The low thermal conductivity of silicon nanostructures, with respect to bulk
silicon, opens excellent possibilities for thermoelectric applications because
it will enable the use of silicon for the high efficient direct conversion of
wasted heat into electrical power. This paves the way for the application of
silicon devices for energy scavenging and green energy harvesting. We present a
device with a large number of nanostructures suspended on a silicon substrate.
Top-down techniques for device fabrication based on advanced lithography and
anisotropic etching will be discussed. FEM simulations were also carried out to
analyze the temperature trend through the nanostructures.
