Nanoelectromechanical resonator arrays for ultrafast, gas-phase chromatographic chemical analysis.
basic_science · Level V
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- Record sourced from PubMed, PMID 20795729.
- Also identified by DOI 10.1021/nl101586s and PMC identifier 3839305.
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Abstract
Miniaturized gas chromatography (GC) systems can provide fast, quantitative analysis of chemical vapors in an ultrasmall package. We describe a chemical sensor technology based on resonant nanoelectromechanical systems (NEMS) mass detectors that provides the speed, sensitivity, specificity, and size required by the microscale GC paradigm. Such NEMS sensors have demonstrated detection of subparts per billion (ppb) concentrations of a phosphonate analyte. By combining two channels of NEMS detection with an ultrafast GC front-end, chromatographic analysis of 13 chemicals was performed within a 5 s time window.