A5031908675- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Mercury impact and mitigation studies
- Cultural Heritage Materials Analysis
- Mass Spectrometry Techniques and Applications
- Identification and Quantification in Food
- Spectroscopy and Chemometric Analyses
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Computational Drug Discovery Methods
- Machine Learning in Healthcare
- Complementary and Alternative Medicine Studies
- Heavy Metals in Plants
- Isotope Analysis in Ecology
- Advanced Fiber Laser Technologies
- Alzheimer's disease research and treatments
- Photonic and Optical Devices
- Healthcare and Venom Research
- Space Exploration and Technology
- Acupuncture Treatment Research Studies
- Rocket and propulsion systems research
- Mineral Processing and Grinding
- Semiconductor Lasers and Optical Devices
University of Massachusetts Lowell
2023-2024
Atilim University
2015-2023
Mississippi State University
2007-2012
Florida International University
2012
Laser-induced breakdown spectroscopy (LIBS) has been applied to measure the equivalence ratio of CH4/air flames using gated detection. In this work, we have developed an ungated, miniature LIBS-based sensor for studying and biodiesel flames. We used characterize flame. LIBS spectra were recorded with different ethanol concentrations in also at axial locations within The performance was evaluated a signals N, O, H from flame determine ratio. A linear relationship between intensity O lines...
Direct analysis of wet slurry samples with laser induced breakdown spectroscopy (LIBS) is challenging due to problems sedimentation, splashing, and surface turbulence. Also, water can quench the plasma suppress LIBS signal, resulting in poor sensitivity. The effect on spectra from slurries was investigated. As content decreased, signal enhanced standard deviation reduced. To improve analysis, dried prepared by applying PVC coated slides were evaluated. Univariate multivariate calibration...
Laser-induced breakdown spectroscopy (LIBS) has been evaluated as a tool for monitoring trace levels of helium in gas mixtures consisting mostly hydrogen. Calibration data hydrogen was investigated at different concentration levels. At high concentrations (>7.25%), the LIBS signal is quenched due to Penning ionization. The alpha line (656.28 nm) observed broaden impurities mixture increased. 587.56 nm selected analyte impurity detection. effects laser energy, delay time between pulse and...
Research on the correlation between metal levels in blood and Covid-19 infection has been conducted primarily by assessing how each individual is linked to different aspects of disease using samples from donors with various severity infection. Using logistics regression LIBS spectra plasma collected pre- post- pandemic known have developed antibodies SARS-Cov-2 virus, we show that relying Na, K, Mg together more efficient at differentiating two types than any single alone.
Abstract Laser induced breakdown spectroscopy (LIBS) is a rapid optical technique for elemental determination, which has been used quantitative analysis in many fields. However, the calibration involving atomic emission intensity and sample concentration, still challenge due to physical-chemical matrix effect of samples fluctuations experimental parameters. To overcome these problems, various chemometric data techniques have combined with LIBS technique. In this study, was show its potential...
Machine learning analysis of ICP-MS data identifies elemental ratios that differentiates with great accuracy blood plasma Alzheimer’s patients and healthy donors.
The past three years have seen a global increase in explosive-based terror attacks. widespread use of improvised explosives and anti-personnel landmines caused thousands civilian casualties across the world. Current scenario globalized civilization threat from drives need to improve performance capabilities standoff explosive trace detection devices be able anticipate safe distance prevent explosions save human lives. In recent years, laser-induced breakdown spectroscopy (LIBS) is an...
Research on the correlation between bio-metal levels in blood and Covid-19 has been conducted primarily by assessing how each individual is linked to different aspects of disease. Instead relying a single approach, we study that focused combined effects four bio-metals differentiation plasma samples from pre-pandemic donors known developed antibodies SARS-Cov-2 virus. Using machine learning laser spectroscopy data, obtain higher patients than when considered separately. This suggests...
Nanoparticle-enhanced laser-induced breakdown spectroscopy and Tag-LIBS are two approaches that have been shown to significantly enhance LIBS sensitivity specificity. In an effort combine both of these approaches, we initiated a study on the effect presence Silver nanoparticle concentrations Europium (Eu) Ytterbium (Yb) signals. We observe signal enhancement emission lines about 10 12 times for lines. This shows enhanced differently; neutral ionized species while only species. Additionally,...
This paper aims toward the successful detection of harmful materials in a substance by integrating machine learning (ML) into laser-induced breakdown spectroscopy (LIBS). LIBS is used to distinguish five different synthetic polymers where eight heavy material contents are also detected LIBS. Each intensity-wavelength graph obtained and dataset constructed for classification algorithm. Seven popular algorithms applied which include substances with their wavelength-intensity value. Machine...