The invention provides for a nanostructured silicon or holey silicon (HS) that has useful thermoelectric properties. The invention also provides for a device comprising the nanostructured silicon or HS. The HS can be placed between two electrodes and used for thermoelectric power generation or thermoelectric cooling.
STATEMENT OF GOVERNMENTAL SUPPORT
 The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract Nos. DE-AC02-05CH11231 and DE-FG02-96ER45612, and by the National Science Foundation under Grant No. DMR-0820506. The government has certain rights in this invention.
CROSS-REFERENCE TO RELATED APPLICATIONS
 This application claims priority to U.S. Provisional Patent Application Ser. No. 61/467,353, filed Mar. 24, 2011, which is incorporated by reference herein.