Enrichment-layer Based Miniaturized Non-dispersive Infrared CO 2 Sensor

Moumen, Sarra; Raible, Isabelle; Krauß, A.; Woellenstein, Juergen

doi:10.1016/j.proeng.2015.08.651

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…Here, we combine two different sensing mechanisms, i.e., the infrared finger prints associated with the electrochemical response of a smart, gas‐selective‐trapping polymer and enhanced absorption characteristics of metamaterial absorber in the mid‐IR spectra, into a “hybrid device” as a new miniaturized optical gas sensor . The miniaturization is realized as the gas‐selective‐trapping polymer layer physically captures and concentrates the CO 2 molecules of the surrounding area.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Metamaterial Absorber Platform for Sensing of CO₂ Gas at Mid‐IR

2018

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Application of two major classes of CO2 gas sensors, i.e., electrochemical and nondispersive infrared is predominantly impeded by the poor selectivity and large optical interaction length, respectively. Here, a novel “hybrid metamaterial” absorber platform is presented by integrating the state‐of‐the‐art complementary metal–oxide–semiconductor compatible metamaterial with a smart, gas‐selective‐trapping polymer for highly selective and miniaturized optical sensing of CO2 gas in the 5–8 µm mid‐IR spectral window. The sensor offers a minimum of 40 ppm detection limit at ambient temperature on a small footprint (20 µm by 20 µm), fast response time (≈2 min), and low hysteresis. As a proof‐of‐concept, net absorption enhancement of 0.0282%/ppm and wavelength shift of 0.5319 nm ppm−1 are reported. Furthermore, the gas‐ selective smart polymer is found to enable dual‐mode multiplexed sensing for crosschecking and validation of gas concentration on a single platform. Additionally, unique sensing characteristics as determined by the operating wavelength and bandwidth are demonstrated. Also, large differential response of the metamaterial absorber platform for all‐optical monitoring is explored. The results will pave the way for a physical understanding of metamaterial‐based sensing when integrated with the mid‐IR detector for readout and extending the mid‐IR functionalities of selective polymers for the detection of technologically relevant gases.

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Section: Introductionmentioning

confidence: 99%

Hybrid Metamaterial Absorber Platform for Sensing of CO₂ Gas at Mid‐IR

2018

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“…[82] Other techniques have utilized the sensor-on-a-chip configuration, nanoantennas, and enrichment layers with NDIR in order to achieve enhanced detection combined with power efficiency and sensitivity for detecting CO 2 and other GHGs. [84] Lastly, in addressing the limitations attributable to traditional NDIR systems, i.e., spectral perturbations and high detection limits, modifications can be made systematically. [71,85] These include changing the types of detectors and light sources, regulating the inlet gas concentrations, and re-arranging the optical designs.…”

Section: Materials Appropriated and Designsmentioning

confidence: 99%

“…Highlighted in the sections above, a vast array of traditional, novel, and hybrid complex materials have been uncovered and adopted within the frameworks of sensors dedicated toward detecting GHGs. These include the carbon nanomaterials, polymers, metal oxide semiconductors, and transition metal dichalcogenides, in calorimetric sensors; [102,108,117,122]] the solid polymer electrolytes, pseudo-solid-state electrolytes, and carbon materials, in electrochemical sensors; [67][68][69]109,121,133,137]] pyroelectric elements, LEDs, and PDs, in IR/FTIR/NDIR sensors; [72][73][74][75][76]78,84,85,109,131]] metal oxides, carbon materials, polymers, and single-or multi-mode optical fibers, in opticalbased sensors; [86][87][88][89][90][92][93][94]109,134]] piezoelectric materials, piezoceramics, carbon materials, and polymers, in acoustic/ultrasonic sensors; [91,[95][96][97][98][99]100,110,111] as well as polymer films in calorimetric or gas chromatographic sensors. [103,104,…”

Section: A Succinct Dictation Of Novel Materials In Ghg Sensingmentioning

confidence: 99%

Significance of Various Sensing Mechanisms for Detecting Local and Atmospheric Greenhouse Gases: A Review

Bassous,

Rodriguez,

Leal

et al. 2023

Advanced Sensor Research

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Elucidating the capital mechanism for detecting greenhouse gases (GHGs) in the atmosphere, based on sensitivity, performance, and cost‐effectiveness, is challenging, but markedly needed in the presence of global climate change caused by GHG emissions and subsequent feedback. Often measured in units of Global Warming Potential (GWP), the GHGs are linked to climate change, especially due to their intrinsic tendencies to absorb heat energy. Hence, measures for reducing GHG emissions are implemented within the context of improving energy consumption; substituting high‐GHG output fuels for more neutral alternatives; trapping and sequestering carbon; and reconditioning agricultural processes. The extent to which these curtailment methods succeed hinges on GHG detection and quantification mechanisms. However, the universal determination of GHGs is constrained by the availability of sensors; this work, therefore, highlights sensor advantages/disadvantages and potential enrichment strategies. Herein, experimental developments in GHG sensing technologies (i.e., chemiresistive, electrochemical, infrared, optical, acoustic, calorimetric, and gas chromatographic sensors) are evaluated, in terms of approaching desirable features, such as sensitivity, selectivity, stability, accuracy, and low cost. This work underscores ongoing global research to produce universal, cost‐effective methods that, with high sensitivity, proffer accurate GHG readings to allay global warming, through comparisons of recent, up‐and‐coming sensor technologies.

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“…In addition, chemisorbed CO 2 sorption bands over the whole spectrum increase with increasing CO 2 concentration in the gas phase as more CO 2 molecules are involved in NH CO 2 reaction. With further exposure to CO 2 , the intensity is no longer dependent on the CO 2 gas concentration [19], but is instead a function of the sorption capacity of the material and the diffusion speed in the bulk. Thus, for sensor applications, the absorption time should be controlled to enable CO 2 quantification.…”

Section: Influence Of the Adsorption Temperaturementioning

confidence: 99%