A5055029606- Microfluidic and Capillary Electrophoresis Applications
- Biosensors and Analytical Detection
- Innovative Microfluidic and Catalytic Techniques Innovation
- Analytical Chemistry and Sensors
- Additive Manufacturing and 3D Printing Technologies
- Analytical Chemistry and Chromatography
- Advanced Sensor and Energy Harvesting Materials
- Aerogels and thermal insulation
- 3D Printing in Biomedical Research
- Nanofabrication and Lithography Techniques
- Ion-surface interactions and analysis
- Diamond and Carbon-based Materials Research
- Surface Modification and Superhydrophobicity
- Advanced biosensing and bioanalysis techniques
- Electrochemical sensors and biosensors
- Soil and Water Nutrient Dynamics
- Carbon Nanotubes in Composites
- Microfluidic and Bio-sensing Technologies
- Electric Motor Design and Analysis
- Analytical chemistry methods development
- Multilevel Inverters and Converters
- Groundwater and Isotope Geochemistry
- Silicon Nanostructures and Photoluminescence
- Sensorless Control of Electric Motors
- Advanced Photocatalysis Techniques
University of Tasmania
2014-2024
ARC Centre of Excellence for Electromaterials Science
2014-2023
University of Jammu
2020
University of Connecticut
2015-2016
Indian Institute of Technology Bhilai
2015
Brigham Young University
2011-2014
University of Cincinnati
2001
Coiled planar capillary chromatography columns (0.9 mm I.D. × 60 cm L) were 3D printed in stainless steel (316L), and titanium (Ti-6Al-4V) alloys (external dimensions of ~5 30 58 mm), either slurry packed with various sized reversed-phase octadecylsilica particles, or filled an situ prepared methacrylate based monolith. coupled directly Peltier thermoelectric direct contact heater/cooler modules. Preliminary results show the potential using such future portable chromatographic devices.
Real-time monitoring of nitrite and nitrate is crucial for maintaining soil health promoting plant growth. In this study, a portable ion-chromatograph (IC, Aquamonitrix) analyser, coupled with field-applicable ultrasonic-assisted extraction method, was utilised real-time field analysis in soil. This the first application type analyser to nutrients On-site from local sports showed 94.8 ± 4.3 μg g−1 nitrate, LODs 32.0 5.4 nitrite. The results were close agreement those obtained using...
The traditional assignment of oxidation states to organic molecules is problematic. Accordingly, in 1999, Calzaferri proposed a simple and elegant solution that based on the similar electronegativities carbon hydrogen: hydrogen would be assigned an state zero when bonded carbon. Here, we show X-ray photoelectron spectroscopy, core electron spectroscopy sensitive elements, generally agrees with his suggestion. We also list typical (IUPAC) rules for assigning states, review recent suggestions...
Effect of column geometry on the liquid chromatographic separations using 3D printed columns with in-column polymerized monoliths has been studied. Three different were designed and in titanium as 2D serpentine, spiral, serpentine columns, equal length i.d. Successful thermal polymerization mechanically stable poly(BuMA-co-EDMA) was achieved within each design without any significant structural differences between phases. Van Deemter plots indicated higher efficiencies for aspect ratio turns...
Particle sizes play a major role to mediate charge transfer, both between identical and different material surfaces. The study probes into the probable mechanism that actuates opposite polarities two size fractions of same by analyzing transfer patterns microcrystalline cellulose (MCC). Quantum scale calculations confirmed alteration capacities due variation moisture content predicted multiple surface bulk analytical techniques. Discrete Element Method (DEM) based multi-scale computational...
We describe a method for plasma cleaning silicon surfaces in commercial tool that removes adventitious organic contamination and enhances silane deposition. As shown by wetting, ellipsometry, XPS, hydrogen, oxygen, argon plasmas effectively clean Si/SiO2 surfaces. However, only hydrogen appear to enhance subsequent low-pressure chemical vapor deposition of silanes. Chemical differences between the were confirmed via (i) two different silanes: octyldimethylmethoxysilane...
Per- and polyfluoroalkyl substances (PFASs) are emerging environmental pollutants of global concern. For rapid field site evaluation, there very few sensitive, field-deployable analytical techniques. In this work, a portable lightweight capillary liquid chromatography (capLC) system was coupled with small footprint mass spectrometer configured for field-based applications. Further, an at-site ultrasound-assisted extraction (pUAE) methodology developed applied capLC/mass spectrometry (MS)...
The on-site and simultaneous determination of anionic nitrite (NO2−) nitrate (NO3−), cationic ammonium (NH4+), in industrial natural waters, presents a significant analytical challenge. Toward this end, herein 3D-printed micro-reactor with an integrated heater chip was designed optimised for the post-column colorimetric detection NH4+ using modified Berthelot reaction. system within portable field deployable ion chromatograph (Aquamonitrix) to separate detect NO2− NO3−, but here enabled dual...
Ultraviolet (UV)-light-emitting diodes (LEDs) are now widely used in analytical absorbance-based detectors; as compared to conventional UV lamps, they offer lower cost, faster response time, and higher photon conversion efficiency. However, current generation deep-UV-LEDs produce excess heat when operated at normal operating currents, which affects output stability reduces their overall performance lifespan. Herein a 3D printed liquid cooling interface has been developed for...
A new miniature deep UV absorbance detector has been developed using low-cost and high-performance LEDs, which can be operated in both scanning (230 to 300 nm) individual wavelength (240, 255, 275 detection modes. The is mostly composed of off-the-shelf components, such as trifurcated fiber optic assembly, a capillary Z-type flow cell, photodiodes. It characterized for use with standard LC system was benchmarked against variable detector. shows very low levels stray light (<0.4%),...
A novel approach for multi-wavelength ultraviolet (UV) absorbance detection has been introduced employing a single board computer (SBC) with field programmable gate array (FPGA), Red Pitaya SBC, to generate separated micro pulses three deep-ultraviolet light-emitting diodes (DUV-LEDs), λmax = 235, 250, and 280 nm, along data acquisition processing via custom-made program. The pulse set generation were synchronized using the SBC. outputs of pulsing DUV-LEDs combined transmitted flow cell...
A novel, low-cost, and disposable thread-based electrofluidic analytical method employing isotachophoresis (ITP) was developed for demonstrating surface DNA hybridization. This approach based on graphene oxide (GO) surface-functionalized zones nylon threads as a binding platform to trap fluorescently labeled isotachophoretically focused single-stranded (ssDNA) band, resulting in quenching of the fluorescence, which signaled quantitative trapping. In event an complementary (cDNA) band passing...