Portland State University of Portland, Ore., has received US Patent No. 8,409,411, "Nano-porous membrane based sensors." The patent describes nanoporous alumina membranes that host immobilized antibodies in the pores. According to the patent, these membrances are sensitized to respond to target compounds, and the capture of the target compound can be detected based on a spectral signature associated with electrical conductance in the nanopores.

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