Publications by authors named "Gi Baek Nam"
Demand for real-time detection of hydrogen and ammonia, clean energy carriers, in a sensitive and selective manner, is growing rapidly for energy, industrial, and medical applications. Nevertheless, their selective detection still remains a challenge and requires the utilization of diverse sensors, hampering the miniaturization of sensor modules. Herein, a practical approach via material design and facile temperature modulation for dual selectivity is proposed.
View Article and Find Full Text PDFArticle Synopsis
- * Palladium alloyed with gold (PdAu) is proposed as a sensor that improves stability and reliability, with a room temperature detection range of 0.0002% to 5% hydrogen and a quick response time of 9.5 seconds.
- * The study also found that specific hydrogen penetration causes lattice compression in PdAu, leading to decreased electrical resistance, suggesting potential for enhanced hydrogen sensor performance through Pd-based alloys.
Micro-light-emitting diodes (μLEDs) have gained significant interest as an activation source for gas sensors owing to their advantages, including room temperature operation and low power consumption. However, despite these benefits, challenges still exist such as a limited range of detectable gases and slow response. In this study, we present a blue μLED-integrated light-activated gas sensor array based on SnO nanoparticles (NPs) that exhibit excellent sensitivity, tunable selectivity, and rapid detection with micro-watt level power consumption.
View Article and Find Full Text PDFArticle Synopsis
- * The researchers developed a new type of gasochromic sensor using Pd-decorated amorphous WO nanorods, addressing the slow recovery issues of existing sensors.
- * The newly designed Pd-WO NRs sensor shows a quick response time of 14 seconds and an impressive recovery time of just 1 second across a range of hydrogen concentrations, enhancing its practical application in detecting hydrogen gas.