A5061482667- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Air Quality and Health Impacts
- Conducting polymers and applications
- Neonatal Health and Biochemistry
- Indoor Air Quality and Microbial Exposure
- Heavy metals in environment
- Membrane-based Ion Separation Techniques
- Advanced Chemical Sensor Technologies
- Advanced oxidation water treatment
- Photosynthetic Processes and Mechanisms
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Nanoparticles: synthesis and applications
- Advancements in Battery Materials
- Spectroscopy Techniques in Biomedical and Chemical Research
- Porphyrin and Phthalocyanine Chemistry
- Catalytic Processes in Materials Science
- Supercapacitor Materials and Fabrication
- Water Quality Monitoring and Analysis
- Analytical chemistry methods development
- Air Quality Monitoring and Forecasting
- Radioactivity and Radon Measurements
- Odor and Emission Control Technologies
Health Canada
2012-2024
University of Ottawa
2002-2010
National University of Singapore
1999-2002
Leibniz Institute for Solid State and Materials Research
1999
Chinese Academy of Sciences
1993-1996
Changchun Institute of Applied Chemistry
1993-1996
High capacity silicon-graphite composite anode materials were made by dispersing silicon in a sol-gel graphite (SGG) matrix. The increased with increasing Si content and the best application performance was delivered containing 19.2 wt % Si, where first cycle discharge charge capacities 1033.7 mAh (or 4311 Si) Si), respectively (80.5% coulombic efficiency). Capacity fading less than 12% 25 cycles, which is substantial improvement over unsupported anodes precipitous drop occurs within few...
ABSTRACT Changes in several dielectric parameters of carp, herring and sea bass during their storage after death at 4 °C, 15 °C 25 were examined by electrochemical impedance spectroscopy (EIS) the frequency range 0.1 Hz to 100 kHz. This method offers a simple, rapid situ measurement onset spoilage. The phase angle admittance changes are best freshness indicators, from which four classifications may be defined for all tested fish species. Warburg‐type CE (chemical reaction preceding an...
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Sol–gel processes were used to fabricate amperometric biosensors that are active for hypoxanthine (Hx) determination. Xanthine oxidase was immobilized in the bulk of silica–graphite matrix (SGM) produce electrodes where new surfaces can be generated on demand by mechanical polishing. The enzyme unmediated hydrogen peroxide oxidation mode, or and mediated oxygen reduction result three different types Hx with detection limits 1.3 × 10–6, 5.6 10–6 3.8 10–7M, respectively. Benzyl viologen as...
Abstract Numerous sources of uncertainty are associated with the gravimetric analysis lightly loaded air filter samples (<100 μg). The purpose study presented here is to investigate effectiveness and limitations buoyancy corrections over experimentally adjusted conditions temperature (21–25 °C) relative humidity (RH) (16–60% RH). Conditioning (24 hr) weighing were performed inside Archimedes M3 environmentally controlled chamber. measurements using 20 size-fractionated resuspended house dust...
This study deployed a suite of direct-reading instruments in six locations inside one building to characterize variability the background aerosol, including incidental nanoparticles (NP), over month period. The instrument consisted portable Condensation Particle Counter (CPC) and Scanning Mobility Sizer (SMPS) for assessing particle number concentrations size distributions nano-scale range; an Aerodynamic (APS) micron-scale distributions; plus desktop Aerosol Monitor (DustTrak DRX) Diffusion...
This study investigated the use of metal impurities in single-wall carbon nanotubes (SWCNT) as potential tracers to distinguish engineered nanomaterials from background aerosols. TEM and SEM were used characterize parent material aerosolized agglomerates collected on PTFE filters using a cascade impactor. image analysis indicated that SWCNT contained about 45% amorphous backscatter electron concentrated within component. Two elements present (Y Ni) selected appropriate this case their...