Zinc Oxide (ZnO) Research
The largest body of work here: spray-pyrolysis, electrospun, and laser-ablated zinc oxide thin films and nanostructures, doped with nickel, manganese, cobalt, cerium, boron, fluorine, magnesium, and iron, mostly evaluated as room-temperature gas sensors.
Spray Deposited Nanostructured Zinc Oxide Thin Film as Room Temperature Ethanol Sensor: Role of Annealing
Annealing transforms a zinc-dominant spray-deposited film into polycrystalline ZnO, and only the film annealed at 623 K gives a useful room-temperature ethanol response.
Boron Induced c-Axis Growth and Ammonia Sensing Signatures of Spray Pyrolysis Deposited ZnO Thin Films: Relation between Crystallinity and Sensing
Optimized spray pyrolysis conditions grow c-axis oriented boron-doped ZnO films instead of the usual crystallinity loss, with 10 mol% boron giving the strongest, most selective room-temperature ammonia response.
Tuning Selectivity through Cobalt Doping in Spray Pyrolysis Deposited ZnO Thin Films
Cobalt doping shifts a spray-pyrolysis ZnO film's gas selectivity between acetaldehyde and ethanol depending on doping level, without changing its 19-25 nm crystallite size range.
Room Temperature Ethanol Sensing Properties of ZnO Nanorods Prepared Using an Electrospinning Technique
A single-step electrospinning route grows ZnO nanorods with three distinct tip shapes, and the flat-ended, loosely packed nanorods give the strongest room-temperature ethanol response.
Non-Mutually Exclusive Dual Role of Hexamethylenetetramine on the Growth of ZnO Nanostructures and Their Sensing Footprints
HMTA plays a dual capping role in ZnO growth, steering crystal shape between nanoprisms and nanodisks, with the nanoparticle-decorated nanoprisms giving the best acetaldehyde selectivity.
Room Temperature Ethanol Sensor Based on ZnO Prepared via Laser Ablation in Water
ZnO nanospheres and nanorods made by chemical-free laser ablation in water both show clear room-temperature selectivity for ethanol, detectable down to 50 ppm.
Room Temperature Ammonia Sensing Properties of ZnO Thin Films Grown by Spray Pyrolysis: Effect of Mg Doping
Magnesium doping tunes spray-pyrolysis ZnO crystallite size and band gap, with the lowest-doping film reaching a room-temperature ammonia response of 796 at 100 ppm.
Synthesis and Characterization of Sol-Gel Dip Coated Pure and Mn-Doped ZnO Thin Films
Pure and manganese-doped ZnO thin films are synthesized by sol-gel dip coating to characterize how manganese doping affects their structure and properties.
Gas Sensing Characteristics of Nanostructured ZnO Thin Film: Influence of Manganese Doping
Manganese doping shrinks ZnO crystallite size from 28 to 7 nm while keeping films selective to ammonia, with the best-performing film giving roughly 5x the undoped response and 60-day stability.
Effect of Nickel Doping on Structural, Optical, Electrical and Ethanol Sensing Properties of Spray Deposited Nanostructured ZnO Thin Films
Nickel doping narrows the optical band gap of spray-deposited ZnO thin films, and a 0.008 M nickel-doped film gives the strongest room-temperature ethanol response, responding in about 50 seconds.
