A Review of Preconcentrator Materials, Flow Regimes and Detection Technologies for Gas Adsorption and Sensing
Aminur Rashid Chowdhury, Tse‐Ang Lee, Coco Day, Tanya Hutter
Abstract
Abstract A preconcentrator is a device used to lower the detection limit of a gas sensor, often integrated upstream of the sensor. Gas preconcentrators have attracted great research interest because of their wide range applications including atmospheric pollution detection, breath analysis, and homeland security. Nanoporous materials, such as carbonaceous adsorbents, metal‐organic frameworks, metallic adsorbents, and oxides, are used to preconcentrate gases for improving detection capability. In this review, preconcentrator materials, detection technologies, and integration with detector configurations are surveyed. Current limitations and future improvement opportunities are also discussed.