Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Oprea, A.

doi:10.1007/s00216-020-02627-3

Cited by 9 publications

(4 citation statements)

References 525 publications

(674 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, zeolites, 88 covalent-organic frameworks (COFs) and porous organic polymers, 89,90 mesoporous silicates 91,92 as well as metal and oxide nanoparticles, 93,94 which can also be functionalized with various photoresponsive molecules but also nd applications in sensors, can be used. These materials are used in gravimetric transducers 95 and can also be used in different sensor setups. 35,96 Thus, there should be an enormous potential for photoprogrammable sensor arrays in target-specic smart sensing devices.…”

Section: Discussionmentioning

confidence: 99%

A photoprogrammable electronic nose with switchable selectivity for VOCs using MOF films

Qin

Okur

et al. 2021

Chem. Sci.

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

A photoprogrammable electronic nose with switchable selectivity for VOCs using MOF films

Qin

Okur

et al. 2021

Chem. Sci.

View full text Add to dashboard Cite

show abstract

“…4,5,8 As explained previously, MOFs show a great potential for gas sensing applications and can be used in a gravimetric sensor. 29 Yet, a single magic MOF material can hardly ever be used to detect multiple gases in a gas stream.…”

Section: Introductionmentioning

confidence: 99%

Material Screening for Gas Sensing using an Electronic Nose: Gas Sorption Thermodynamic and Kinetic Considerations

Rajagopalan¹,

Petit²

2021

Preprint

View full text Add to dashboard Cite

To detect multiple gases in a mixture, one must employ an electronic nose or sensor array, composed of several materials as a single material cannot resolve all the gases in a mixture accurately. Given the many candidate materials, choosing the right combination of materials to be used in an array is a challenging task. In a sensor whose sensing mechanism depends on a change in mass upon gas adsorption, both the equilibrium and kinetic characteristics of the gas-material system dictate the performance of the array. The overarching goal of this work is two-fold. First, we aim to highlight the impact of thermodynamic characteristics of gas-material combination on array performance and to develop a graphical approach to rapidly screen materials. Second, we aim to highlight the need to incorporate the gas sorption kinetic characteristics to provide an accurate picture of the performance of a sensor array. To address these goals, we have developed a computational test bench that incorporates a sensor model and a gas composition estimator. To provide a generic study, we have chosen, as candidate materials, hypothetical materials that exhibit equilibrium characteristics similar to metal organic frameworks (MOFs). Our computational studies led to key learnings, namely: (1) exploit the shape of the sensor response as a function of gas composition for material screening purposes for gravimetric arrays; (2) incorporate both equilibrium and kinetics for gas composition estimation in a dynamic system; and (3) engineer the array by accounting for the kinetics of the materials, the feed gas flow rate, and the size of the device.

show abstract

“…5,6,9 As explained previously, MOFs show great potential for gas sensing applications and can be used in a gravimetric sensor. 30 Yet, a single magic MOF material can hardly ever be used to detect multiple gases in a gas stream. An array of sensors (also known as electronic nose, analogous to the human olfactory system) has been proposed to overcome the issue of multigas sensing.…”

mentioning

confidence: 99%

“…Gravimetric sensors provide an excellent platform for gas sensing due to their simple miniature construction, commercial availability, low cost, and ability to provide online data. ,, In these sensors, the gas uptake, on an active sensing surface (porous materials, e.g., MOFs), is inferred by changes in physical quantities like resonance frequency (for QCM) or modulation of surface acoustic waves (for SAW). The mass detection limit of these devices is usually in the order of nanograms. ,, As explained previously, MOFs show great potential for gas sensing applications and can be used in a gravimetric sensor . Yet, a single magic MOF material can hardly ever be used to detect multiple gases in a gas stream.…”

mentioning

confidence: 99%

Material Screening for Gas Sensing Using an Electronic Nose: Gas Sorption Thermodynamic and Kinetic Considerations

Rajagopalan

Petit

2021

ACS Sens.

View full text Add to dashboard Cite

To detect multiple gases in a mixture, one must employ an electronic nose or sensor array, composed of several materials, as a single material cannot resolve all the gases in a mixture accurately. Given the many candidate materials, choosing the right combination of materials to be used in an array is a challenging task. In a sensor whose sensing mechanism depends on a change in mass upon gas adsorption, both the equilibrium and kinetic characteristics of the gas–material system dictate the performance of the array. The overarching goal of this work is twofold. First, we aim to highlight the impact of thermodynamic characteristics of gas–material combination on array performance and to develop a graphical approach to rapidly screen materials. Second, we aim to highlight the need to incorporate the gas sorption kinetic characteristics to provide an accurate picture of the performance of a sensor array. To address these goals, we have developed a computational test bench that incorporates a sensor model and a gas composition estimator. To provide a generic study, we have chosen, as candidate materials, hypothetical materials that exhibit equilibrium characteristics similar to those of metal–organic frameworks. Our computational studies led to key learnings, namely, (1) exploit the shape of the sensor response as a function of gas composition for material screening purposes for gravimetric arrays; (2) incorporate both equilibrium and kinetics for gas composition estimation in a dynamic system; and (3) engineer the array by accounting for the kinetics of the materials, the feed gas flow rate, and the size of the device.

show abstract

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Cited by 9 publications

References 525 publications

A photoprogrammable electronic nose with switchable selectivity for VOCs using MOF films

A photoprogrammable electronic nose with switchable selectivity for VOCs using MOF films

Material Screening for Gas Sensing using an Electronic Nose: Gas Sorption Thermodynamic and Kinetic Considerations

Material Screening for Gas Sensing Using an Electronic Nose: Gas Sorption Thermodynamic and Kinetic Considerations

Contact Info

Product

Resources

About