Abstract
The last three decades have witnessed an increasing demand for novel analytical tools for the analysis of gases including odorants and volatile organic compounds (VOCs) in various domains. Traditional techniques such as gas chromatography coupled with mass spectrometry, although very efficient, present several drawbacks. Such a context has incited the research and industrial communities to work on the development of alternative technologies such as artificial olfaction systems, including gas sensors, olfactory biosensors and electronic noses (eNs). A wide variety of these systems have been designed using chemiresistive, electrochemical, acoustic or optical transducers. Among optical transduction systems, surface plasmon resonance (SPR) has been extensively studied thanks to its attractive features (high sensitivity, label free, real-time measurements). In this paper, we present an overview of the advances in the development of artificial olfaction systems with a focus on their development based on propagating SPR with different coupling configurations, including prism coupler, wave guide, and grating.
Highlights
Over the last few decades, the detection of gases including odorant molecules and volatile organic compounds (VOCs) has attracted great interest and has become increasingly in demand in various field
The gold standard for VOC detection involves the use of trained human or canine noses or gas chromatography coupled with mass spectrometry (GC-MS)
Rapp et al [85] presented an improved array of eight surface acoustic wave (SAW) sensors for the detection of organic gas and an in-built multiplexing technique that allows an easy optimization of signal to noise ratio
Summary
Over the last few decades, the detection of gases including odorant molecules and volatile organic compounds (VOCs) has attracted great interest and has become increasingly in demand in various field. Artificial olfaction systems include gas sensors, olfactory biosensors and an electronic nose (eN). In the same manner as barcodes, odors are encoded by a combination of olfactory receptors, which allows the nose to have this large detection spectrum. Different sensoran systems employing chemiresistive, electrochemical, in order to develop gas sensors and electronic systems employing piezoelectric, and optical transducers [24] havenoses. A large number of reviews have presented the operating principles of the various sensor systems that have been developed so far for VOC and gas detection [8,24,31,32,33,34,35,36].
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