Digital ammonia gas sensor based on quartz resonator tuned by interdigital electrode coated with polyaniline film

Yu, Xiang; Chen, Xiangdong; Chen, Xinpeng; Zhao, Xuan; Yu, Xinglin; Ding, Xing

doi:10.1016/j.orgel.2019.105413

Cited by 28 publications

(5 citation statements)

References 37 publications

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“…Similar sensitivity toward ammonia vapors has been obtained by our NF CA sensor using citric-acid-doped PVAc nanofibers in comparison to the devices coated with chitosan, stereo-regulated siloxane film, carboxyl-functionalized carbon nanocoil (CNC), and boric acid-doped PVAc nanofibers. 54,96,97 Although the NF CA sensor exhibits relatively lower sensitivity than vanadium pentoxide (V 2 O 5 ) nanoplatelets, polyaniline (PANI) films, and TiO 2 /graphene-oxide films, 98–100 it provides a much better detection limit (LOD), in which it can only be competed by the polypyrrole/naphthalene disulfonic acid (PPy/NDSA) film. The LOD values of several devices were not mentioned.…”

Section: Resultsmentioning

confidence: 99%

Influence of dopant concentration on the ammonia sensing performance of citric acid-doped polyvinyl acetate nanofibers

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Influence of dopant concentration on the ammonia sensing performance of citric acid-doped polyvinyl acetate nanofibers

et al. 2022

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“…The QCM method offers high sensitivity and selectivity with a diverse range of appropriate coatings . The ammonia sensors based on QCM have been well studied by utilizing various sensing materials, e.g., polymers and metal oxides. − In this case, nanostructured materials are often preferable for their extremely high specific surface-area-to-volume ratios. , …”

Section: Introductionmentioning

confidence: 99%

Quartz Crystal Microbalances Functionalized with Citric Acid-Doped Polyvinyl Acetate Nanofibers for Ammonia Sensing

Roto

Rianjanu

Rahmawati

et al. 2020

ACS Appl. Nano Mater.

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We fabricated highly sensitive and selective ammonia gas sensors based on quartz crystal microbalance (QCM) platforms that were functionalized with electrospun polyvinyl acetate (PVAc) nanofibers and doped with various organic acids (i.e., oxalic, tartaric, and citric acids). The structural and chemical surface conditions of the nanofiber-based active layers on top of the QCMs were confirmed by scanning electron microscopy (SEM), atomic force microscopy (AFM), and Fourier-transform infrared (FTIR) spectroscopy. The sensitivity of the PVAc nanofiber-based QCM sensor doped with citric acid was found to be the highest (2.95 Hz/ppm) among others with a limit of detection (LOD) of down to the subppm level (550 ppb). It also exhibited good selectivity, rapid response, short recovery time, and decent repeatability. This simple yet low-cost alternative solution based on chemical modification of nanofibers could improve the performance of QCM-based ammonia gas sensors in many areas including for smart electronic nose applications.

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“…Polyaniline is a conductive polymer that has also been widely applied as a QCM-based sensor [6][7][8][9][10]. The selection of polyaniline (PANI) as a candidate for active sensor material is because PANI has good reversibility, high stability, and is easy to synthesize.…”

Section: Introductionmentioning

confidence: 99%

Implications of the Electrodeposition Scan Rate on the Morphology of Polyaniline Layer and the Impedance of a QCM Sensor

et al. 2023

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This work aims to determine how the scan rate affects PANI layers' morphology and resonance parameters deposited on quartz crystal microbalance (QCM). The PANI layer was produced using the electrodeposition method with a scan rate variation of 10 to 50 mV/s. The PANI layer deposited at a scan rate of 10 mV/s has an aggregate morphology, whereas the morphology becomes more scattered at a higher scan rate. On the other hand, the homogeneity of the distribution of PANI particles increases due to the increase in the scan rate. The QCM impedance profile also changes with PANI layer deposition at different scan rates. The QCM impedance profile with the PANI layer that is most similar to the uncoated QCM impedance profile is at a scan rate of 10, 40 and 50 mV/s. The resonance parameters, which represent the inertial mass and the dissipative characteristics of the PANI layer, were investigated. The PANI layer with the smallest resonance parameter has a scan rate of 10 and 40 mV/s. Therefore, the 2 scan rates are the best candidates to be applied further. HIGHLIGHTS The electrodeposition scan rate influences the morphology of the PANI layer deposited above QCM The amount of carbon distributed across the QCM surface represents how effective the PANI deposition was The resulting morphology will impact the PANI layer's impedance characteristic and resonance parameter values GRAPHICAL ABSTRACT

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Digital ammonia gas sensor based on quartz resonator tuned by interdigital electrode coated with polyaniline film

Cited by 28 publications

References 37 publications

Influence of dopant concentration on the ammonia sensing performance of citric acid-doped polyvinyl acetate nanofibers

Influence of dopant concentration on the ammonia sensing performance of citric acid-doped polyvinyl acetate nanofibers

Quartz Crystal Microbalances Functionalized with Citric Acid-Doped Polyvinyl Acetate Nanofibers for Ammonia Sensing

Implications of the Electrodeposition Scan Rate on the Morphology of Polyaniline Layer and the Impedance of a QCM Sensor

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