2020
DOI: 10.3390/s20195478
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Advancements in Microfabricated Gas Sensors and Microanalytical Tools for the Sensitive and Selective Detection of Odors

Abstract: In recent years, advancements in micromachining techniques and nanomaterials have enabled the fabrication of highly sensitive devices for the detection of odorous species. Recent efforts done in the miniaturization of gas sensors have contributed to obtain increasingly compact and portable devices. Besides, the implementation of new nanomaterials in the active layer of these devices is helping to optimize their performance and increase their sensitivity close to humans’ olfactory system. Nonetheless, a common … Show more

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Cited by 32 publications
(23 citation statements)
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“…Also, as sound waves are less dispersed in tissue than photons, MPI can overcome the limitations of traditional optical images. Some MPI methods have been developed to obtain images of biological tissues such as MPI using endogenous chromophores like hemoglobin, melanin, water or lipids 24 , MPI using dyes 25 , MPI with nanostructures like silver nanoplates 23 , and molecular photoacoustic contrast agents (MPCA) 26 . The use of the different contrast agents will depend on the depth you want to reach at the study time.…”
Section: Methods For Mpi Developmentmentioning
confidence: 99%
“…Also, as sound waves are less dispersed in tissue than photons, MPI can overcome the limitations of traditional optical images. Some MPI methods have been developed to obtain images of biological tissues such as MPI using endogenous chromophores like hemoglobin, melanin, water or lipids 24 , MPI using dyes 25 , MPI with nanostructures like silver nanoplates 23 , and molecular photoacoustic contrast agents (MPCA) 26 . The use of the different contrast agents will depend on the depth you want to reach at the study time.…”
Section: Methods For Mpi Developmentmentioning
confidence: 99%
“…A basic sensor then transduces 1 of these quantities into an observable, e.g., resistance (DR), capacitance (DC), or resonance frequency (Df) changes of an electronic device, which is integrated into an electronic circuit generating the sensors' overall output signal. sensors that measure observables that are affected by a chemical interaction (52,(490)(491)(492). There are few available observables; among them, the most exploited are electric potential, conductivity, mass, and optical properties (absorption and/or emission spectra).…”
Section: Chemical Sensorsmentioning
confidence: 99%
“…Furthermore, gas detection is paramount in consumer, industry, agriculture, environment, safety and security applications [2]. Among gas sensors, the family of metaloxide (MOX) sensors dominates the sensor market [3]. MOX gas sensors might have different applications but they often have similar operational principles and architecture.…”
Section: Introductionmentioning
confidence: 99%
“…Metal and metal-ceramic packages are robust, easy to use and provide a good protection from the environment, such as moisture and contaminants: additionally, they are hardwearing and hence suitable for an extended operation at elevated temperatures [3]. In terms of performance and reliability, they often overcome other types of packaging such a plastic.…”
Section: Introductionmentioning
confidence: 99%