A5048855707- Bone Tissue Engineering Materials
- Nanoplatforms for cancer theranostics
- Dental materials and restorations
- Photodynamic Therapy Research Studies
- Luminescence Properties of Advanced Materials
- Dental Implant Techniques and Outcomes
- Semiconductor materials and devices
- Laser-Ablation Synthesis of Nanoparticles
- Nuclear Materials and Properties
- Titanium Alloys Microstructure and Properties
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Additive Manufacturing Materials and Processes
- Ocular and Laser Science Research
- Advanced Photocatalysis Techniques
- Ocular Infections and Treatments
- Adhesion, Friction, and Surface Interactions
- Laser Material Processing Techniques
- Shape Memory Alloy Transformations
- Electronic and Structural Properties of Oxides
- Tribology and Lubrication Engineering
Western Kentucky University
2022-2025
University of Wisconsin–Madison
2024
Efflux pumps are active transporters, which allow the cell to remove toxic substances from within including antibiotics and photosensitizer complexes. pump inhibitors (EPIs), chemicals that prevent passage of molecules through efflux pumps, play a crucial role in antimicrobial effectiveness against pathogen. In this work, we studied effect EPI, namely, reserpine, on photodeactivation rate pathogens when used with Ag NPs methylene blue (MB). Our results show using reserpine led higher...
Zirconia is increasingly favored for dental implants owing to its corrosion resistance, hypoallergenic properties, and superior esthetics, but biocompatibility remains a challenge. This study explores laser-assisted surface modification enhance zirconia bioactivity. transitions from the monoclinic tetragonal phase during sintering, with mixed phases observed in pre-sintered stage. These are critical understanding structural stability malleability. Grid patterns were imprinted on green body...
In this study, the effects of substrate temperature and ablation wavelength/mechanism on structural, mechanical, bioactivity properties hydroxyapatite (HA) coatings were investigated. HA deposited both Si(100) Ti6Al4V surfaces. Substrate varied from room to 800 °C. Depositions performed in Ar/H2O vacuum environments. X-ray diffraction, scanning electron microscopy, atomic force microscopy techniques used analyze structural morphological variations. The adherence substrates was assessed by...
The formation of laser-induced periodic surface structures (LIPSS) on mirror-polished 304-grade stainless steel sheets with dimensions 25 mm × 0.8 upon irradiation picosecond laser pulses in air and water environments at different wavelengths, number pulses, energy densities was investigated. Atomic force microscopy (AFM) scanning electron (SEM) were used to characterize the LIPSS. Tunable periodicity LIPSS observed both media wavelengths fluence. Fluence shown be main parameter LIPSS;...
Zirconia is known to be a hard-to-machine in the sintered state. In this study, zirconia samples were patterned and then sintered. A nanosecond Nd:YAG laser operating at 1064 was used pattern surface. confined plasma formed through interaction between beam copper grid template. The template covered by sacrificial aluminum layer, using glass slide. size depth of shown dependent on shape grid, fluence, exposure time, confinement medium, wavelength, spot size. We successfully achieved patterns...
Zirconium (Zr) thin films were deposited on silicon using pulsed laser deposition (PLD) with two wavelengths (1064 nm and 532 nm) varying substrate temperatures (25 °C, 300 500 °C) fluences (0.25, 0.5, 1.0 J/cm2). Results indicate that smoother obtained 1064 surface roughness increased higher fluences. Optimal crystalline at °C. XRD, SEM, AFM analysis revealed distinct patterns peaks related to parameters. The growth mechanisms of a Zr film computed based well-known continuum model growth....
This study reports the effects of substrate temperature and laser ablation wavelength on structural bioactivity properties hydroxyapatite (HAP) coatings. The coatings were obtained using a pulsed deposition technique Ti6Al4V Si(100) substrates. Different temperatures used ranging from 25°C to 800°C. Three wavelengths Nd:YAG (1064 nm, 532 355 nm) employed mechanisms their film morphology. Surface morphology was investigated by SEM with EDX Analysis AFM. All confirmed be grown in granular...
Using Pulsed Laser Deposition (PLD), Zr films were deposited on silicon with laser wavelengths of 1064 nm and 532 nm, at substrate temperatures 25 °C, 300 500 fluences 0.25, 0.5, 1.0 J/cm<sup>2</sup>. The wavelength yielded smoother films, surface roughness growing higher fluences. °C temperature was ideal for crystal quality. Analyses through XRD, SEM, AFM showed unique morphologies due to variables. Computations using a thin film growth model matched the empirical data,...
Bacterial antibiotic resistance poses a pressing global health crisis, challenging conventional therapies. Efflux pumps diminish antimicrobial effectiveness by expelling drugs from bacterial cells. Multidrug efflux (MEPs) have been found to transport diverse compounds, including phenothiazinium dyes like methylene blue, out of bacteria. Inhibition MEPs offers promising strategy bolster the efficacy photodynamic inactivation (PDT). This research adopts synergistic approach, combining pump...
Shape Memory Alloys (SMA) have unique characteristics to memorize their original structure and retain them when activated by heat or stress, however, there still much be done in terms of fatigue life phase modifiability. In this project, we propose a tunable treatment method using shockwaves created nanosecond picosecond pulsed lasers assisted with magnetic field create 3-D structures on NiTi SMA. When the laser pulse hits surface, its energy is partially absorbed, which ablates surface...
Photosensitizing agents play an essential role in deactivation process of multidrug resistant pathogens and tumor treatments. In this work, methylene blue (MB) functionalized silver nanoparticles (Ag NPs) are used as effective photodynamic therapy (PDT) agent for deactivating different strains bacteria. Ag NPs were synthesized by pulsed laser ablation technique aqueous solutions like polyvinylpyrrolidone (PVP), citrate polyvinyl alcohol (PVA) at wavelength power. With 1064nm wavelength,...