Rapid detection and good anti-humidity performance of resistive n-propanol gas sensor based on an ordered open porous ZnSnO3/ZnO heterostructures

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

Dual-Functional Antenna Sensor for Highly Sensitive and Selective Detection of Isopropanol Gas Using Optimized Molecularly Imprinted Polymers

ACS Sensors, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Accurate monitoring of isopropanol (IPA) levels is crucial for safety in industrial and laboratory settings, as high concentrations can lead to serious health issues. In this study, we present, the first time, a dual-functional antenna sensor capable high-performance IPA gas detection with concentration estimation uninterrupted wireless communication, using optimized molecularly imprinted polymer (MIP)/multiwalled carbon nanotube (MWCNT)-based sensing materials. Comprehensive characterization these materials confirms successful formation homogeneity composites. Furthermore, electrical gas-sensing properties were evaluated functionalized interdigitated electrode (IDE)-based structures, sensitivity, evaluate These IDE which acted impedance-varying components during operation, coupled single-port monopole develop highly sensitive selective while maintaining communication services. The results showed that fabricated platform exhibits strong selectivity, stability at room temperature, effectively distinguishing it from other interference gases. addition, same material, demonstrated antenna-based exhibited higher sensitivity than chemiresistive sensor, achieving limit (18.8 ppm) below thresholds IPA. Moreover, antenna's radiation pattern capabilities remained unaffected, ensuring functionality. Detailed optimization process mechanism novel MIP-based supported by both structural characterizations could serve milestone future studies advancement next-generation sensors.

Language: Английский

Porous and Homogeneous Nanoheterojunction-Accumulating PdO@ZnO Structure for Exhaled Breath Ammonia Sensing

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(47), P. 22583 - 22593

Published: Nov. 13, 2024

The functional gas sensor device plays a pivotal role in intelligent medical treatment, among which metal oxide semiconductors are widely studied because of their inexpensiveness and ease fabrication. However, the sensors present significant challenge detecting NH3 at ppm levels within complex exhaled gases. Herein, ZnO/PdO-x series were prepared by situ loading palladium particles calcining using nano-ZIF-8 as precursor, not only provided more transport path for ammonia adsorption but also achieved homogeneous nanoheterojunction accumulation structure. tailor-made ZnO/PdO-2 exhibits optimum sensitivity, with response value 5.56 100 160 °C lower detection limit 0.75 ppm. Particularly, it has clear quantitative to actual liver kidney patients. By elucidating intrinsic link between MOF templates sensing mechanism, is expected broaden rational design metal-oxide thus provide an effective method clinical detection.

Language: Английский