US Patent 7723684 - SWCNT infrared detector

http://www.freepatentsonline.com/7723684.html

Although this is not the first patent for a CNT infrared detector (see US 6400088) it teaches a variation capable of counting individual photons having energies of around 1 eV. Claim 1 reads:

1. An infrared (IR) detector, comprising:

a sensor element comprising a thin film of single-walled carbon nanotubes (SWNTs) suspended between electrical contacts.