A Transparent Nanopatterned Chemiresistor: Visible-Light Plasmonic Sensor for Trace-Level NO Detection at Room Temperature.

The highly selective detection of trace gases using transparent sensors at room temperature remains challenging. Herein, transparent nanopatterned chemiresistors composed of aligned 1D Au-SnO nanofibers, which can detect toxic NO gas at room temperature under visible light illumination is reported. Ten straight Au-SnO nanofibers are patterned on a glass substrate with transparent electrodes assisted by direct-write, near-field electrospinning, whose extremely low coverage of sensing materials (≈0.

Immobilization of Photocatalytic ZnO Nanopowders Using Anodized Nanoporous Alumina Substrates.

Nanoporous Al₂O₃ substrates with an average pore size of about 150 nm were prepared via anodization of Aluminum plates. Depending on the anodization condition, the surface area of the anodized Al₂O₃ was increased more than six-fold. Solution-combusted ZnO nanopowders were prepared as a function of fuel/oxidant ratios.

Humidity-Independent Gas Sensors Using Pr-Doped InO Macroporous Spheres: Role of Cyclic Pr/Pr Redox Reactions in Suppression of Water-Poisoning Effect.

Pure and 3-12 at. % Pr-doped InO macroporous spheres were fabricated by ultrasonic spray pyrolysis and their acetone-sensing characteristics under dry and humid conditions were investigated to design humidity-independent gas sensors. The 12 at.

Photoluminescence and Electrical Properties of ZnO Nanopowders Prepared by a Solution Combustion Method for Optoelectronic Device Application.

Nano-sized powders of ZnO phosphor were prepared by a solution combustion method (SCM). The ZnO powder prepared using Zn(OH)₂ and glycine as the oxidant and fuel, respectively, (fuel/oxidant = 0.8), show good powder characteristics such as an average grain size of 30 nm and specific surface area of 120 m²/g.

Gas Selectivity Control in CoO Sensor via Concurrent Tuning of Gas Reforming and Gas Filtering using Nanoscale Hetero-Overlayer of Catalytic Oxides.

CoO sensors with a nanoscale TiO or SnO catalytic overlayer were prepared by screen-printing of CoO yolk-shell spheres and subsequent e-beam evaporation of TiO and SnO. The CoO sensors with 5 nm thick TiO and SnO overlayers showed high responses (resistance ratios) to 5 ppm xylene (14.5 and 28.

Co3O4-SnO2 Hollow Heteronanostructures: Facile Control of Gas Selectivity by Compositional Tuning of Sensing Materials via Galvanic Replacement.

Co3O4 hollow spheres prepared by ultrasonic spray pyrolysis were converted into Co3O4-SnO2 core-shell hollow spheres by galvanic replacement with subsequent calcination at 450 °C for 2 h for gas sensor applications. Gas selectivity of the obtained spheres can be controlled by varying the amount of SnO2 shells (14.6, 24.