Recent progress in hybrid conducting polymers and metal oxide nanocomposite for room-temperature gas sensor applications: A review

Metal Oxide-Based Sensors for Ecological Monitoring: Progress and Perspectives

“…Nevertheless, chemoresistive metal oxide gas sensors have some disadvantages, such as low selectivity and high operating temperatures [28]. In order to overcome these disadvantages, metal oxide sensors are either decorated [29,30] or nanomaterials/nanocomposites are created [31,32]. In addition, chemoresistive metal oxide devices often suffer from nonlinear responses, signal fluctuations, and cross-sensitivity to different gases, which limits their use for air quality monitoring.…”

“…However, some challenges remain in their development. These often include low selectivity, insufficient lifetime, and problems in creating optimal geometric characteristics of the sensors [31]. Overcoming these shortcomings requires additional in-depth theoretical (e.g., DFT modeling) and experimental studies, as well as the use of modern micro-industrial approaches (e.g., 3D printing) to create the desired design and reduce the time for sensor fabrication.…”

“…The use of rGO fibers coated with MoS x Se 2-x with an increased Se content in [192] allowed the rapid recovery of the sensor surface with no additional heating. In [31], the authors exhaustively covered the latest advances in the use of hybrid polymer-metal oxide mixtures as gas sensors operating at RT. The use of bimetallic Pt-Au particles on ZnO nanorods, as demonstrated in [85], allows one to achieve a sensitivity of up to 250 ppm H 2 with fairly high selectivity.…”

Protein-Aided Synthesis of Copper-Integrated Polyaniline Nanocomposite Encapsulated with Reduced Graphene Oxide for Highly Sensitive Electrochemical Detection of Dimetridazole in Real Samples

“…In contrast with noble NPs, copper nanoparticles (Cu NPs) have gained attention for their versatile applications due to their environmental friendliness, cost-effectiveness, and strong electrical and catalytic attributes [ 17 , 18 ]. Recently, composites of MNPs and conductive polymers (CPs) have gained growing consideration not only due to scientific attraction but also owing to their practicable implementations in electrocatalysts and sensors/biosensors [ 19 , 20 ]. Nanocomposite formation is important for electrocatalysis and is a key novelty of this manuscript [ 21 ].…”

Bulk Trapping Organic Semiconductor with Amino-Additive Enabling Ultrasensitive NO2 Sensors

“…Presently, the majority of commercial semiconductor gas sensors are based on metal oxide type gas sensors, offering an LOD down to ppb level with fast response speed. However, these sensors typically necessitate operation at high temperature. , In recent years, tremendous new materials have been explored for high performance gas sensors, including porous materials, − nanowires and nanofibers, − two-dimensional materials, − and conductive polymers. − Among them, organic semiconductors (OSCs) have emerged as promising candidates due to their advantages such as room temperature (RT) operation, potential selectivity, low cost, and flexibility. − Nevertheless, the performances of OSC gas sensors still fall short of meeting the requirements for practical applications, particularly in terms of response/recovery rate, stability, and repeatability. To tackle these challenges, numerous strategies have been developed, encompassing the design of novel sensing materials, interface modification around the active layer, and the integration of sensor arrays.…”