Application of polymethyl[4-(2,3-difluoro-4-hydroxyphenoxy)butyl] siloxane in surface acoustic wave gas sensors for dimethyl methylphosphonate detection

Grabka, Michał; Jasek, K.; Pasternak, M.

doi:10.1016/j.snb.2020.129216

Cited by 27 publications

(19 citation statements)

References 31 publications

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“…We have demonstrated the ability of a TPSAWR based QSM to detect extremely light particles such as respiratory viruses attached to the active QSM resonance area which is also consistent with other recent work [19]. With an average virus particle mass of 0,5 fg, the calibrated mass sensitivity of a practical 434 MHz QSM was measured as 19,7 kHz/ng and the limit of detection was about 11 fg or 22 average virus particles.…”

Section: Discussionsupporting

confidence: 88%

“…The current pandemic called severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2) [1][2][3], causing the coronavirus disease 2019 (COVID- 19), is believed to have created the most serious health crisis on the planet since the outbreak of the Spanish influenza that took a death toll of tens of millions of people worldwide back in 1918/19. At the time of this writing, the number of SARS-Cov-2 infected exceeds 160 million and the number of dead approaches 3,3 million people globally.…”

Section: Introductionmentioning

confidence: 99%

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The Quartz Surface Microbalance - a Possible Candidate for Rapid Respiratory Virus Detection

Avramov

2021

2021 IEEE International Symposium on Applications of Ferroelectrics (ISAF)

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The mass sensitive quartz surface microbalance (QSM) uses Rayleigh surface acoustic wave (RSAW) and surface transverse wave (STW) modes propagating in high-Q two-port resonators on temperature compensated rotated Y-cuts of quartz and is considered as the high-frequency equivalent of the widely used classical quartz crystal microbalance (QCM) using the thickness shear bulk acoustic wave (BAW) mode. In this study we investigate the QSM's ability to detect extremely light particles attached to its surface for possible applications in portable equipment for rapid detection of the SARS-Cov-2 coronavirus and other similar respiratory viruses in the human breath. We feel that it may be useful for personal use and prescreening large masses of population for such viruses. We estimate the mass of a virus particle as 0,5 fg and determine the mass sensitivity and limit of detection of a typical calibrated 434 MHz RSAW QSM as 19,7 kHz/ng and 11 pg (22 average virus particles), respectively. Thus, the QSM provides at least 3 orders of magnitude higher mass sensitivity and lower limit of detection than the classical QCM. Furthermore, using protein particles simulating the presence of the coronavirus in human breath, we show experimentally that the QSM can successfully detect such particles and measure their concentration.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

The Quartz Surface Microbalance - a Possible Candidate for Rapid Respiratory Virus Detection

Avramov

2021

2021 IEEE International Symposium on Applications of Ferroelectrics (ISAF)

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“…Earlier investigations showed that plasma polymers have a highly branched and cross-linked structure, resulting in excellent adhesion to almost any substrate [11,15]. They are mechanically stable and chemically resistive over changing temperature and time and quickly adsorb and desorb the quantity of the measured gas [5,11]. Moreover, they are elastic, follow the surface deformation of the acoustic device, and do not significantly degrade its loss and Q [10].…”

Section: Deposition Of the Plasma Polymer Sensing Filmsmentioning

confidence: 99%

“…Plasma polymer (PP) films (PPFs) have established themselves as reliable solid and semisolid sensing layers in surface acoustic wave (SAW)-based mass sensitive elements in gas and liquid phase chemical and biological sensor systems [1,2]. Today, such sensors are found in a variety of applications, such as systems for environmental monitoring and protection [3,4], detection of highly toxic warfare gases [5], various electronic noses in the food and drug industry [6], biosensors for medical diagnostics [7], volatile organic compounds (VOC) [8], and ultrafine particle detection [9], etc. PPFs are highly sensitive and yield fast response times [10].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement in Plasma Polymer Films for Surface Acoustic Wave Based Sensor Applications

et al. 2021

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Plasma polymer films (PPF), widely used as sensing layers in surface acoustic wave (SAW) based gas and liquid phase sensors, have a major drawback: high concentrations of the sensed analytes easily drive these films into saturation, where accurate measurements are no longer possible. This work suggests a solution to this problem by modifying the PPF with the sensed chemical compound to improve the overall sorption properties and sensor dynamic range. Thin polymer films were synthesized from hexamethyldisiloxane (HMDSO) and triethylsilane (TES) monomers in a plasma-enhanced chemical vapor deposition (PECVD) process using a RF plasma reactor. We used these Si-containing compounds because they are known for their excellent sensing properties. In this work, the layers were deposited onto the active surface of high-Q 438 MHz Rayleigh SAW two-port resonators, used as mass sensitive sensor elements. We call these devices quartz surface microbalances (QSM). In a second step, ammonia plasma modification was applied to the HMDSO and TES films, in order to achieve a higher sensitivity to NH3. The sensors were probed at different NH3 gas concentrations in a computer controlled gas probing setup. A comparison with unmodified films revealed a 74% to 85% improvement in both the sensitivity and sorption ability of the HMDSO sensing layers, and of about 8% for the TES films.

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“…A plethora of different analytical methods including conductometric [8], spectroscopic [9], micro-cantilever [10], gas chromatography [11], surface plasmon resonance [12], surface acoustic [13], field-emission transistors [14], microwave, [15] and chemo-resistive sensors based on nano-sized semiconductor metal oxides that have emerged as potential gas sensor materials and have been exhaustively investigated for variety of hazardous toxic gases [16,17]. Recently, many metals oxide-based gas sensors based on a chemo-resistive technique have been reported for H 2 S gas sensing and monitoring.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Leaf-Shaped CuO Nanosheets Based Sensor Device for Enhanced Hydrogen Sulfide Gas Sensing Application

Algadi

Kumar²,

Akhtar

et al. 2021

Chemosensors

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Herein, a simple, economical and low temperature synthesis of leaf-shaped CuO nanosheets is reported. As-synthesized CuO was examined through different techniques including field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray diffraction (XRD), fourier transform infrared spectroscopic (FTIR) and Raman spectroscopy to ascertain the purity, crystal phase, morphology, vibrational, optical and diffraction features. FESEM and TEM images revealed a thin leaf-like morphology for CuO nanosheets. An interplanar distance of ~0.25 nm corresponding to the (110) diffraction plane of the monoclinic phase of the CuO was revealed from the HRTEM images XRD analysis indicated a monoclinic tenorite crystalline phase of the synthesized CuO nanosheets. The average crystallite size for leaf-shaped CuO nanosheets was found to be 14.28 nm. Furthermore, a chemo-resistive-type gas sensor based on leaf-shaped CuO nanosheets was fabricated to effectively and selectively detect H2S gas. The fabricated sensor showed maximum gas response at an optimized temperature of 300 °C towards 200 ppm H2S gas. The corresponding response and recovery times were 97 s and 100 s, respectively. The leaf-shaped CuO nanosheets-based gas sensor also exhibited excellent selectivity towards H2S gas as compared to other analyte gases including NH3, CH3OH, CH3CH2OH, CO and H2. Finally, we have proposed a gas sensing mechanism based upon the formation of chemo-resistive CuO nanosheets.

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Application of polymethyl[4-(2,3-difluoro-4-hydroxyphenoxy)butyl] siloxane in surface acoustic wave gas sensors for dimethyl methylphosphonate detection

Cited by 27 publications

References 31 publications

The Quartz Surface Microbalance - a Possible Candidate for Rapid Respiratory Virus Detection

The Quartz Surface Microbalance - a Possible Candidate for Rapid Respiratory Virus Detection

Sensitivity Enhancement in Plasma Polymer Films for Surface Acoustic Wave Based Sensor Applications

Ultrathin Leaf-Shaped CuO Nanosheets Based Sensor Device for Enhanced Hydrogen Sulfide Gas Sensing Application

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