High-performance ethanol gas sensor using TiO2 nanostructures

TiO2/Pt/TiO2 Sandwich Nanostructures: Towards Alcohol Sensing and UV Irradiation-Assisted Recovery

“…In this work, the TiO 2 /Pt/TiO 2 sandwich nanostructures were prepared by sputtering technique and were used as sensing material for ethanol, methanol, and 2-propanol detection in the sensor response results of the TiO 2 /Pt/TiO 2 sandwich nanostructures to the recent researches on ethanol sensing which are mostly based on ZnO, SnO 2 , and TiO 2 with various structures, such as nanoparticle, nanosphere, core-shell, nanotube and thin film, and various doping conditions [12][13][14][15][16][17][18]; it was found that the TiO 2 /Pt/TiO 2 sandwich nanostructures show advantages in terms of 10 ppm level sensitivity, roomtemperature operation, and stability. However, Ag@TiO 2 core-shell nanoparticles show the highest sensitivity down to 0.15 ppm ethanol with a fast response time and a fast recovery time but its fabrication process relies on wet process, which is time-consuming [15].…”

“…The nanostructured materials, such as nanoparticle, nanowire, nanorod, and nanotube have demonstrated excellent sensing performance compared to conventional thin films [8][9][10][11][12][13][14][15][16][17][18][19][20]. The high selectivity of the sensors has been improved by surface modification with noble metals such as Pt and Pd [21,22].…”

On-chip readout plasmonic mid-IR gas sensor

“…There are growing interests for gas sensing such as greenhouse gas monitoring 1 , indoor air quality supervision 2 , automobile tail gas discharge detection 3 , toxic or flammable gases detection 4 , breath diagnostics 5 , industrial production 6 , etc. So far, several major approaches have been developed 7 , including electrochemical sensors 8 , calorimetric sensors 9 , acoustic sensors 10 and optical sensors 11 .…”