Selectivity of a QCM gas sensor modified by ZnSn(OH)₆via analysis of adsorption thermodynamics and kinetics

Abstract

In this paper, a novel analysis approach was employed to achieve the selectivity of a quartz crystal microbalance (QCM) sensor.

Materials Design, Sensing Performance and Mechanism of Anhydrous Hydrogen Fluoride Gas Sensor Based on Amino-Functionalized MIL-101(Cr) for New Energy Vehicles

“…A QCM gas sensor is a kind of mass-sensitive detector, which has many advantages, such as its low cost, stability, reliability, good selectivity, high precision and fast response; in particular, it has a high sensitivity and can achieve nanogram-level detection [12][13][14][15]. QCM gas sensors detect gas by the change of the resonant frequency of the quartz crystal caused by the mass change on the surface of the crystal after gas adsorption [16][17][18][19][20].…”

GC-like Graphene-Coated Quartz Crystal Microbalance Sensor with Microcolumns

“…Along with the sensors mentioned above, quartz crystal microbalance (QCM)-based gas sensors also have been actively researched because of their high sensitivity and reliability in detection of liquid- or vapor-phase analytes. For this, various nanomaterials such as porous particles, thin films, and nanorods are utilized as the gas-adsorbing layer on QCM electrodes, which results in a significant enhancement in sensitivity of the sensor. − The adsorption layer is especially important because the QCM-based gas sensing system is operated by measuring the adsorbed mass change in analyte (Δ m ) and resulting frequency variation (Δ F ) under the adsorption process of the analyte onto QCM electrodes. In previous reports, − QCM sensors with electrodes functionalized with nanoparticles can exhibit high sensitivity for single or multiple types of gases, but observed frequency and mass variations can only be interpreted as a dynamic adsorption process with the thermodynamic parameter.…”

“…For this, various nanomaterials such as porous particles, thin films, and nanorods are utilized as the gas-adsorbing layer on QCM electrodes, which results in a significant enhancement in sensitivity of the sensor. − The adsorption layer is especially important because the QCM-based gas sensing system is operated by measuring the adsorbed mass change in analyte (Δ m ) and resulting frequency variation (Δ F ) under the adsorption process of the analyte onto QCM electrodes. In previous reports, − QCM sensors with electrodes functionalized with nanoparticles can exhibit high sensitivity for single or multiple types of gases, but observed frequency and mass variations can only be interpreted as a dynamic adsorption process with the thermodynamic parameter. This analytic method is only available for the detection of already-known analytes, but it is difficult to apply it for identification of unknown compounds or mixtures of compounds.…”

Zinc Oxide Thin Film Prepared by Micro-Dropping Chemical Method on QCM for Gas Sensing

“…Recently, quartz crystal microbalances (QCM) have attracted considerable research interest due to their high response and sensitivity [1][2][3]. The operating principle work of QCM sensor is based on the change of resonance frequency due to mass change caused by the adsorption phenomena related to the sensitive layer [4]. Different metal oxide materials can be used as sensitive layer.…”