A5016170857- Gas Sensing Nanomaterials and Sensors
- Boron and Carbon Nanomaterials Research
- Analytical Chemistry and Sensors
- ZnO doping and properties
- Ga2O3 and related materials
- Advanced Chemical Sensor Technologies
- Graphene research and applications
- Advancements in Battery Materials
- Semiconductor materials and interfaces
- Copper-based nanomaterials and applications
- Pneumocystis jirovecii pneumonia detection and treatment
- Biblical Studies and Interpretation
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Coatings and Gratings
- Water Quality Monitoring and Analysis
- Pharmaceutical studies and practices
- Plasmonic and Surface Plasmon Research
- Semiconductor materials and devices
- Nanowire Synthesis and Applications
- Carbon Nanotubes in Composites
- Hydrogen Storage and Materials
- Optical and Acousto-Optic Technologies
- Pigment Synthesis and Properties
- Ion-surface interactions and analysis
- HIV/AIDS drug development and treatment
Oklahoma State University Oklahoma City
2023
Oklahoma State University
2018-2023
American Academy of Arts and Sciences
2021
The effects of annealing on the stoichiometry and electronic structure Co-doped ZnO nanorods (NRs), as prepared by chemical bath deposition (CBD), were investigated photoemission spectroscopies (XPS UPS) X-ray diffraction (XRD). Co 2p core level state as-grown NRs is consistent with a Co3O4 stoichiometry, independent concentration. Upon material above 865 K, satellite forms, which formation CoO. valence band density states also exhibits changes annealing, where new forms between Fermi 1 eV...
Silica nanosprings (NS) were coated with gallium nitride (GaN) by high-temperature atomic layer deposition. The deposition temperature was 800 °C using trimethylgallium (TMG) as the Ga source and ammonia (NH3) reactive nitrogen source. growth of GaN on silica compared thin films to elucidate properties. effects buffer layers aluminum (AlN) oxide (Al2O3) stoichiometry, chemical bonding, morphology determined X-ray photoelectron spectroscopy (XPS), high-resolution x-ray diffraction (HRXRD),...
Ammonium nitrate is an explosive agent that has a very low vapor pressure, which makes airborne detection challenging. Detection of ammonium been achieved by using silica nanospring mats coated with thin semiconducting layer zinc oxide. The sensor was operated at room temperature and under ambient conditions in air. Lock-in amplification employed to measure the change electrical resistance upon exposure said target gas analyte. showed fast detection, only taking ∼15 s reach its peak...
On thermal treatment, eight different graphite materials became resistant to air aging for at least 9 weeks compared the usual time of hours a few days when assayed in 1 mM ferri-ferrocyanide solution. In addition, resistance lasted 7 immersed solution frequently reported minutes hours. Experimental results confirm that with heat HOPG-ZYH, rods, pyrolytic graphites, felts, and natural artificial graphites undergo structural reorganization leads restructuring their electronic nature. This...
The effect of UV illumination on the room temperature electrical detection ammonium nitrate vapor was examined. sensor consists a self-assembled ensemble silica nanosprings coated with zinc oxide. mitigates baseline drift resistance relative to operation under dark conditions. It also lowers by 25% compared At high concentrations (120 ppm), recovery time after exposure is virtually identical or without illumination. low (20 assists refreshing stimulating analyte desorption, thereby enabling...
Novel Au mesostructures with a polyhedron shape, henceforth referred to as pyramids, are produced by annealing in vacuo an thin film on Si(100) substrate. Gold diffusion and incorporation into pyramids is function of the thickness film, temperature, vacuum pressure. The have unique surface morphologies due presence channels plateaus, where cut plateaus surfaces between adjacent channels. bulk consists cavities that devoid or Si. Normalized energy dispersive spectroscopy intact regions 98.1...
A method to conformally coat silica nanosprings with magnesium via sublimation at 450 °C has been developed. In addition, Mg thin films were grown on Si(100) using this determine the effects of substrate morphology (nanoscale curvatures vs. planar) interfacial coating. High-resolution/powder X-ray diffraction (HRXRD/PXRD) both Mg-coated NS and film revealed presence Mgand MgO due exposure samples air. Scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS) confirmed...
Several new allotropes of carbon have been discovered in recent decades with unique physical properties, enabling innovations numerous applications from energy storage/conversion to water purification drug delivery. The exceptional versatility begs the question, are there other or mesoscale structures yet be discovered? Herein, a mesoscopic tubular is introduced, referred as Boron Ortho-carborane Doped (BOD) Carbon, which obtained by boron doping pseudo-graphite known GUITAR (Graphite...
Gold mesopyramid structures are formed on Si[100] by annealing a trilayer of Au-Si-Au that assists with the formation gold silicide eutectic and enhances their formation. Convex concave mesostructures produced. The Au mesopyramids typically few microns in height, while four to five deep. Scanning electron microscopy (SEM) surface cross-sectional imaging reveal presence channels voids within interior structures. A five-step process is proposed describe based tension spinodal band...
Abstract Background Many pediatric and some adult people living with HIV (PLWH) are unable to swallow tablets require alternative antiretroviral formulations (ARVF) such as liquids, chewable tablets, or powders for suspension. A growing number of issues the timely procurement ARVF have been reported; full scope this problem is unknown. Without access appropriate treatment, PLWH at increased risk poor disease outcomes. This study’s objective was determine availability its potential impact on...