A5101402013- Laser-induced spectroscopy and plasma
- Laser Material Processing Techniques
- Ion-surface interactions and analysis
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Atomic and Molecular Physics
- Analytical chemistry methods development
- Mercury impact and mitigation studies
- High-Temperature Coating Behaviors
- Plasma Diagnostics and Applications
- Fusion materials and technologies
- Surface Roughness and Optical Measurements
- ZnO doping and properties
- Laser-Ablation Synthesis of Nanoparticles
- Nuclear Materials and Properties
- Integrated Circuits and Semiconductor Failure Analysis
- Metamaterials and Metasurfaces Applications
- Polydiacetylene-based materials and applications
- Surface Treatment and Residual Stress
- Gas Sensing Nanomaterials and Sensors
- Laser Applications in Dentistry and Medicine
- Dental materials and restorations
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Surface Polishing Techniques
- Electronic and Structural Properties of Oxides
Government College University, Lahore
2016-2025
Lahore College for Women University
2017
Centre of Advanced Studies
2013
Femtosecond laser-induced surface structuring is a promising technique for the large-scale formation of nano- and microscale structures that can effectively modify materials' optical, electrical, mechanical, tribological properties. Here we perform systematic study on femtosecond gold (Au) their effect both hydrophobicity bacterial-adhesion We created various including subwavelength periodic (fs-LIPSSs), fs-LIPSSs covered with nano/microstructures, conic 1D-rod-like (≤ 6 μm), spherical...
Abstract The effect of laser-irradiance on the surface morphology and laser induced breakdown spectroscopy zinc has been investigated by employing Nd:YAG (wavelength λ = 1064 nm, pulse duration t ~ 10 ns, repetition rate Hz) under ambient environment argon at a pressure 20 Torr. For this purpose, targets were exposed to various irradiances ranging from 13 GW/cm 2 100 . Scanning electron microscope analysis performed analyze modification irradiated targets. revealed formation kinds structures...
Abstract The effect of the transverse magnetic field on laser-induced breakdown spectroscopy and surface modifications germanium (Ge) has been investigated at various fluences. Ge targets were exposed to Nd: YAG laser pulses (1064 nm, 10 ns, 1 Hz) different fluences ranging from 3 25.6 J/cm 2 generate plasma under argon environment a pressure 50 Torr. strength 0.45 Tesla perpendicular direction expansion was employed by using two permanent magnets. emission spectra detected system. electron...
Optical emission spectra of a laser induced plasma vanadium pentoxide (V2O5) using Nd:YAG (1064 nm, 10 ns) in the presence and absence magnetic field 0.45 T have been investigated. The effect (B) on V2O5 at various irradiances ranging from 0.64 GW cm−2 to 2.56 is investigated while keeping pressure environmental gases Ar Ne constant 100 Torr. parameters also explored different delay times 0 μs for both irradiance 1.28 cm−2. It revealed that intensity electron temperature initially increase...
The effects of laser irradiation on the mechanical response polycrystalline zirconium (Zr) have been investigated. Zr samples were irradiated with an excimer (KrF) (λ ≈ 248 nm, τ 18 ns and repetition rate ≈30 Hz). was performed in ambient environment a gas mixture containing (CO2:N2:He) under filling pressure 20 Torr by varying fluences ranging from 3.8 to 5.1 J cm−2. surface structural modification targets investigated using scanning electron microscope (SEM) x-ray diffractometer (XRD). In...
Mechanisms of Ni ablation in vacuum and atmosphere at various fluences ranging from to are studied by using a KrF excimer laser. The formation conical microstructures, ripples, large-sized irregular shaped cavities pits is found. It shown that no new phases formed the case vacuum, while nitrides nitro-oxides appear environment. microhardness analysis targets irradiated shows decreasing trend with increasing fluence, whereas environment, monotonic increase hardness fluence observed.
Abstract The influence of nature and pressure ambient environment on the surface modification, plasma parameters, hardness, corrosion resistance Mg-alloy has been investigated. Nd: YAG laser (1064 nm, 10 ns, 25 mJ) at a fluence 1.3 J cm −2 employed as an irradiation source. Targets were exposed in environments argon (Ar), neon (Ne), helium (He) pressures ranging from 5 to 760 Torr. Scanning electron microscope investigate morphology irradiated targets. It reveals formation cavities, cones,...
The effect of substrate temperature on growth pulsed laser deposited copper oxide thin films has been investigated by employing Nd: YAG (532[Formula: see text]nm, 6[Formula: text]ns, 10[Formula: text]Hz) irradiation at a fluence 8.2[Formula: text]J/cm 2 . XRD analysis reveals that room are amorphous in nature, whereas higher temperatures polycrystalline nature. SEM and AFM analyses revealed temperatures, ranging from to 300[Formula: text]C comprised large sized clusters, islands...
Laser irradiation effects on surface, structural and mechanical properties of Al–Cu–Mg alloy (Al–Cu 2024) have been investigated. The specimens were irradiated for various fluences ranging from 3.8 to 5.5 J/cm2 using an Excimer (KrF) laser (248 nm, 18 ns, 30 Hz) under vacuum environment. surface modifications the targets investigated by scanning electron microscope (SEM) X-ray diffractometer (XRD), respectively. SEM analysis reveals formation micro-sized craters along growth periodic...
Abstract The effect of nature and pressure ambient environment on laser-induced breakdown spectroscopy (LIBS) ablation mechanisms silicon (Si) have been investigated. A Q -switched Nd-YAG laser with the wavelength 1064 nm, pulse duration 10 ns, pulsed energy 50 mJ was employed. Si targets were exposed under environments inert gases argon, neon, helium for different pressures ranging from 5 to 760 torr. influence emission intensity plasma explored by using LIBS spectrometer system. parameters...
The effect of substrate temperature on the structural, optical and morphological properties ZnO thin films has been investigated. were deposited quartz for various temperatures ranging from room to 250°C by pulsed laser deposition (PLD) technique. Nd:YAG (532 nm, 100 mJ, 6 ns, 10 Hz) with corresponding fluence J/cm 2 was employed ablation target. Characterization carried out using X-ray diffraction (XRD), high resolution UV-visible spectrometer, atomic force microscope (AFM) scanning...