A5040670735- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Mercury impact and mitigation studies
- Cultural Heritage Materials Analysis
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Transition Metal Oxide Nanomaterials
- MXene and MAX Phase Materials
- Industrial Gas Emission Control
- Electrocatalysts for Energy Conversion
- Gas Sensing Nanomaterials and Sensors
- Hybrid Renewable Energy Systems
- X-ray Spectroscopy and Fluorescence Analysis
- Ga2O3 and related materials
- Hydrogen Storage and Materials
- Supercapacitor Materials and Fabrication
Quaid-i-Azam University
2019-2024
University of Arizona
2023-2024
Abdus Salam Centre for Physics
2019-2024
In the present study, immediate detection of rare-earth elements (REEs) in phosphorite deposits has been reported using laser-induced breakdown spectroscopy (LIBS). Numerous emission lines corresponding to REEs such as lanthanum (La), cerium (Ce), neodymium (Nd), samarium (Sm), and ytterbium (Yb), have detected spectra phosphorite-induced plasma plume. For quantitative analysis, we employed calibration-free LIBS (CF-LIBS), Energy Dispersive X-ray (EDX) techniques. The results obtained...
Rare earth elements are gaining significant importance in the scientific and technological fields for their exciting physical properties characteristics. The aim of present study was to determine rare (REEs) geological ores found Northern Areas Pakistan. We application laser-induced breakdown spectroscopy (LIBS) laser ablation time-of-flight mass spectrometry (LA-TOF-MS) elemental analysis ore samples containing REEs. plasma plume exhibits a wide array emission lines, including those such as...
The purpose of the present study is to determine elemental composition Pakistani cement brands using calibration-free laser induced breakdown spectroscopy (CF-LIBS) and compare obtained results with other analytical techniques such as, ablation – time-of-flight mass spectrometry (LA-TOF-MS), energy dispersive X-ray (EDX), fluorescence (XRF) proton emission (PIXE). Compositional reveal that all are mainly composed calcium, silicon, iron, aluminum, magnesium, potassium, sodium, titanium,...
Laser-induced breakdown spectroscopy (LIBS) technique was utilized to study the green mineral fluorite (CaF2) samples. The LIBS experiment performed using Nd: YAG Laser system and a linear array CCD detector coupled with an Avantes spectrometer in air atmosphere. optical emission spectra of ten different samples were studied. molecular bands correspond B2Σ+-X2Σ+ orange A2Π-X2Σ systems diatomic CaF-molecule, specifically at Δν = -1, 0, +1 sequences CaO molecule between 618 nm 630 detected. It...
In this work, we report the results of compositional analysis an aluminum gallium arsenide (AlGaAs) sample using calibration-free laser-induced breakdown spectroscopy (CF-LIBS) technique. The AlGaAs was doped with three various concentrations (Ga), arsenic (As), and (Al), as reported by manufacturer, CF-LIBS technique employed to identify doping concentration. A pulsed Q-switched Nd: YAG laser capable delivering 200 400 mJ energy at 532 1064 nm, respectively, focused on target for ablation,...
The plant Saussurea Simpsoniana, which has been used in traditional medicine for its biocompatibility and abundant nutrients, offers a wide range of remedies. Local communities effectively utilize medicines derived from the plant's roots to treat various ailments such as bronchitis, rheumatic pain, abdominal nervous disorders. In this study, we present an elemental analysis chemical composition (wt%) medicinal using laser-induced breakdown spectroscopy (LIBS) technique. air atmosphere,...
Rare earth elements (REEs) hold significant industrial, scientific, and modern technological worth. This study focused on detecting quantifying REEs in various geological ore samples. These samples were collected from different REE-bearing locations recommended by experts. The analysis was conducted using laser-induced breakdown spectroscopy (LIBS) laser ablation time-of-flight mass spectrometry (LA-TOF-MS). In this work, LIBS methodology employed three configurations: standard LIBS, with an...
We report a quantitative analysis of various plant-biochar samples (S1, S2 and S3) by utilizing laser-induced breakdown spectroscopy (LIBS) technique. For LIBS analysis, microplasma was generated on the target surface using focused beam through high-power Nd: YAG laser optical emission spectra were recorded charged coupled device (CCD) array spectrometer, with wavelength ranges from 200 nm to 720 nm. The spectroscopical showed existence ingredients, including H, Li, Ca, Na, Al, Zn, Mg, Sr,...
The laser-induced breakdown spectroscopy (LIBS) technique was performed on polymers to study the neutral and ionic emission lines along with CN violet system (B2Σ+ X2Σ+) C2 Swan (d3 Пg–a3 Пu). For laser-based analyses, plasma produced by focusing laser beam of a Q-switched Nd: YAG (2ω) at an optical wavelength 532 nm, 5 ns pulse width, repetition frequency 10 Hz. integration time detection fixed 1–10 ms while target sample positioned in air ambiance. Two organic were investigated this work:...
Abstract In the present study, we compositional analysis of a Devarda’s alloy using calibration–free laser-induced breakdown spectroscopy (CF-LIBS) technique. A nanosecond pulsed Q-switched Nd:YAG laser was focused on target-sample under investigation to ablate its surface and measured emission spectrum registered by spectrometer (LIBS2000+) having optical spectral within range from 200–720 nm. The spectra confirms presence three major elements Aluminum (Al), Copper (Cu), Zinc (Zn) in target...
The potential of using laser-induced breakdown spectroscopy (LIBS) in combination with various other spectroscopic and statistical methods was assessed for characterizing pure MgO-doped nylon (6/6) organic polymer samples. samples, obtained through a polycondensation chemical technique, were artificially doped MgO prior to analysis comparative purposes. These samples served as crucial reference materials LIBS studies performed under local thermodynamic equilibrium (LTE) optically thin plasma...
In the present work, rapid identification of elements and their relative chemical composition in various Peganum harmala seed samples were investigated using a calibration-free laser-induced breakdown spectroscopy technique (CF-LIBS). A pulsed Nd:YAG laser-source with 5 ns pulse-duration, 10 Hz pulse repetition rates providing 400 200 mJ energy at 1064 532 nm wavelength, respectively, was focused on for ablation. LIBS 2000+ spectrometer within wavelength range (200 to 720 nm),...
In this present work, we demonstrated a spectral characterization of copper–iron (Cu-Fe) alloy using optical emission spectroscopy. The Cu-Fe plasma was generated on the target sample surface by directing laser pulse Q-switched Nd: YAG second harmonic (2ω) with 532 nm wavelength. spectrum acquired five miniature spectrometers that lie within wavelength range 200–720 nm. characterized validating local-thermodynamical equilibrium (LTE) as well optically thin (OT) condition. addition, LTE...
Abstract We present elemental analysis and thermal characterization of pure two different concentrations zinc-doped copper oxide (CuO) samples using analytical techniques. The quantitative as well qualitative investigations, were performed by incorporating calibration-free laser-induced breakdown spectroscopy (CF-LIBS) technique. plasma was generated on the surface focusing a first harmonic Nd: YAG laser 1064 nm wavelength time-integrated emission spectra achieved through set five...