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An innovative fabrication method to produce a nanoporous Si or SiO2 surface by employing anodic aluminum oxidation (AAO) method and reactive ion beam (RIE) etch of MEMS process is presented. To enhance sensitivity and reduce the sensing dimensions of a gas sensor, a nanoporous surface of gas-sensitive material is preferred. This class of sensor devices can be implemented on silicon or silicon-on-insulator...
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