Abstract
Odor sensing has been applied in many fields, such as environmental monitoring, health care, and medical diagnosis. However, traditional gas-sensing systems have critical drawbacks, particularly regarding their miniaturization. An electronic nose system is a suitable alternative to traditional gas-sensing systems because the nose system employs a gas sensor array to detect and identify different odors. Accordingly, this study designed a nose-on-a-chip by using the electronic nose concept through complementary metal-oxide-semiconductor (CMOS) technology for minimizing the device size and reducing power consumption. The chip incorporates a CMOS-compatible gas sensor array along with other electronic components that are used for signal processing and data analysis. Assessment results revealed the ability of the proposed nose-on-a-chip in executing various processes such as diagnosing ventilator-associated pneumonia. Hence, the CMOS-compatible miniature gas-sensing system is a promising candidate for use in devices intended for personal use.