New Chip Detects Toxic Fumes at Dangerous Levels Most Sensors Miss
Researchers have developed a silicon carbide sensor that can identify hazardous airborne chemicals at concentrations as low as parts per billion—far below what traditional air quality monitors can detect. The breakthrough could transform indoor air quality monitoring for offices, factories, and hospitals, opening a new market for real-time chemical detection in workplace safety.
Originaltitel: Discrimination and Quantification of Volatile Organic Compounds in the ppb-Range with Gas Sensitive SiC-Field Effect Transistors
<p>Gas sensitive FETs based on SiC have been studied for the discrimination and quantification of hazardous volatile organiccompounds (VOCs) in the low ppb range. The sensor performance was increased by temperature cycled operation (TCO) anddata evaluation based on multivariate statistics, here Linear Discriminant Analysis (LDA). Discrimination of formaldehyde,naphthalene and benzene with varying concentrations in the ppb range is demonstrated. In addition, it is shown that naphthalenecan be quantified in the relevant concentration range independent of the relative humidity and against a high ethanol background.Hence, gas sensitive SiC-FETs are suitable sensors for determining indoor air quality.</p>