Until very recently, handheld spectrometers were the domain of major analytical and security
instrument companies, with turnkey analyzers using spectroscopic techniques from X-ray …

Optical gas sensors play an increasingly important role in many applications. Sensing
techniques based on mid-infrared absorption spectroscopy offer excellent stability …

Photoacoustic spectroscopy (PAS) as a highly sensitive and selective trace gas detection
technique has extremely broad application in many fields. However, the laser sources …

Viability and metabolic assays are commonly used as proxies to assess the overall
metabolism of microorganisms. The variety of these assays combined with little information …

On-line analysis of exhaled breath offers insight into a person's metabolism without the need
for sample preparation or sample collection. Due to its noninvasive nature and the possibility …

We review the history, development, design principles, experimental operating
characteristics, and specialized architectures of interband cascade lasers for the mid-wave …

Remote chemical detection in the atmosphere or some specific space has always been of
great interest in many applications for environmental protection and safety. Laser absorption …

Acetone plays a critical role in environmental protection and human healthcare, thus
necessitating sensitive and selective detection. In this regard, a resistive …

Breath analysis enables rapid, noninvasive diagnostics, as well as long-term monitoring of
human health, through the identification and quantification of exhaled biomarkers. Here, we …

The human olfactory system remains one of the most challenging biological systems to
replicate. Humans use it without thinking, where it can measure offer protection from harm …