Graphene oxide/polyaniline-based microwave split-ring resonator: A versatile platform towards ammonia sensing

Low‐Profile Planar Antenna Sensor Based on Ti3C2Tx MXene Membrane for VOC and Humidity Monitoring

“…[47] Still, the observed response is considered to be rapid compared to the similar microwave VOC sensing investigation. [15,20,21] Additionally, the analysis performed on acetone concentrations, using the fitting curves (Figure 9), demonstrated that the adsorption and recovery rates are nearly identical for different concentrations. As presented in Table 2, the rise and fall time constants for the different acetone concentrations were below 26 and 36 s, respectively, showing that the MXene antenna sensor has a rapid sensing response and recovery, even for different acetone concentrations.…”

“…[9,10] Following this method, previous studies have intensively investigated the potential of split-ring resonator (SRR) structures to implement microwave resonator-based sensors for various applications, including gas detection. [11][12][13][14][15][16][17][18] Zarifi et al demonstrated the potential of an SRR sensor incorporating polydimethylsiloxane (PDMS) as interface material to detect acetone gas with concentration ranging between 0 and 265 parts per thousand. [19] Tanguy et al proposed the nanocomposite of polyaniline (PANI) and phosphate-functionalized reduced graphene oxide (P-rGO) as interface material in SRR sensors to enhance sensitivity and selectivity.…”

“…[ 9,10 ] Following this method, previous studies have intensively investigated the potential of split‐ring resonator (SRR) structures to implement microwave resonator‐based sensors for various applications, including gas detection. [ 11–18 ] Zarifi et al. demonstrated the potential of an SRR sensor incorporating polydimethylsiloxane (PDMS) as interface material to detect acetone gas with concentration ranging between 0 and 265 parts per thousand.…”

Research Progress of Graphene and Its Derivatives towards Exhaled Breath Analysis

“…Javadian-Sara et al explored a microwave-based open-loop resonator (SRR) sensor based on the nanocomposite prepared by the in-situ polymerization of polyaniline (PANI) on the surface of GO [ 68 ], as shown in Figure 7 b. At room temperature, it has a high sensitivity of 0.038 dB ppm −1 to low concentration (1–25 ppm) ammonia, a response/recovery time of 150/400 s, and a sensitivity of 0.0045 dB ppm −1 to high concentrations (>25 ppm).…”

“…Copyright (2020), used with permission from Elsevier. ( b ) The expanded coil when PANI nanocomposites were pinned to the GO sheets; ( c ) the adsorption mechanism of GO–PANI in ammonia [ 68 ]. Copyright (2021), used with permission from Elsevier.…”