Porous silicon is becoming increasingly important for the sensitive detection of liquid and gaseous analytes due to its high surface area and tunable porosity and functionality. These authors report the first use of porous silicon for the analysis of mixtures of chemical compounds. Using time-resolved reflectivity measurements to analyze ethanol and acetone mixtures, they found that the components could be separated temporally in the porous Si film in a process that is analogous to gas chromatography, the porous Si film playing the dual role of separation column and detector.
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Létant et al. (2001) studied this question.
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