The Experts below are selected from a list of 55530 Experts worldwide ranked by ideXlab platform
Karsten Plamann - One of the best experts on this subject based on the ideXlab platform.
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cell viability and shock wave amplitudes in the endothelium of porcine cornea exposed to ultrashort Laser Pulses
Graefes Archive for Clinical and Experimental Ophthalmology, 2017Co-Authors: Syed Asad Hussain, Carles Milian, Caroline Crotti, Laura Kowalczuk, Fatima Alahyane, Zacaria Essaidi, Arnaud Couairon, Marieclaire Schanneklein, Karsten PlamannAbstract:Purpose Some forms of keratoplasty assisted by ultrashort-Pulse Lasers require performing Laser cuts close to the endothelium, which requires the knowledge of “safe” values concerning incision depth and Pulse Energy preserving endothelial cell viability. Our study aims to determine the thresholds for cell death in porcine corneas exposed to ultrashort Laser Pulses, in terms of Laser Pulse Energy and nearness of the impacts to the endothelium.
Jamshid Sabbaghzadeh - One of the best experts on this subject based on the ideXlab platform.
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Effects of ultrasound radiation on the synthesis of Laser ablated gold nanoparticles
Journal of Physics D: Applied Physics, 2008Co-Authors: Siamak Dadras, P. Jafarkhani, Mohammad Javad Torkamany, Jamshid SabbaghzadehAbstract:An innovative design has been proposed to develop the synthesis of Laser ablated gold nanoparticles in pure water, by co-radiation of Nd : YAG Laser Pulses and ultrasound waves. UV–VIS absorption spectroscopy illustrated the enhancement of the synthesis rate of the particles in the diversity of Laser Pulse energies applied in the presence of ultrasound waves. In addition, the proliferative effects of Laser Pulse Energy on the synthesis rate and the size of particles were recognized as well. Emission spectroscopy of the induced plasma was utilized to justify the variation of the synthesis rate versus the applied operating conditions. Electron microscopy as a complementary technique confirmed the results of spectroscopic findings concerning the enlargement of nanoparticles by Laser Pulse Energy.
Jing Huang - One of the best experts on this subject based on the ideXlab platform.
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ultrashort Laser Pulse Energy deposition in metal films with phase changes
Applied Physics Letters, 2011Co-Authors: Yunpeng Ren, J K Chen, Yuwen Zhang, Jing HuangAbstract:Four optical models of reflectivity and absorption coefficient are investigated in this letter. After compared with existing experimental data, the extended Drude model is incorporated into a two-temperature model to simulate Laser Energy deposition and thermal response, including solid–liquid and liquid–vapor phase change, in a gold film irradiated by a femtosecond Laser Pulse. Dynamic reflectivity and absorption coefficient should be employed in modeling ultrafast Laser heating except for very low Laser fluencies.
Davoud Dorranian - One of the best experts on this subject based on the ideXlab platform.
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Investigation of excitonic and photoluminescence properties of ZnO nanoparticles
Optics and Photonics Society of Iran, 2015Co-Authors: Elmira Solati, Davoud DorranianAbstract:Zinc oxide nanoparticles were synthesized using Pulsed Laser ablation of Zn metal plate in deionized water without using surfactant. In this paper, the effects of Laser Pulse Energy and wavelength on the properties of ZnO nanoparticles have been investigated. Transmission electron microscopy analysis confirmed that the size distribution of ZnO nanoparticles is decreased with increasing the Laser Pulse Energy. The room temperature photoluminescence spectra of ZnO nanoparticles show intense violet emission along with the emission in blue and green band. The excellent UV emission indicates that the ZnO nanostructure have a low defect concentration.
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Effect of Laser Pulse Energy and wavelength on the structure, morphology and optical properties of ZnO nanoparticles
Optics & Laser Technology, 2014Co-Authors: Elmira Solati, Laya Dejam, Davoud DorranianAbstract:In this work, the effects of the Laser Pulse Energy and Laser wavelength on the production of ZnO nanoparticles prepared by Pulsed Laser ablation of Zn metal plate in deionized water are investigated. The beam of a Q-switched Nd:YAG Laser of 1064 and 532 nm wavelengths at 6 ns Pulse width and different fluences is employed to irradiate the solid target in water. The ZnO nanoparticles were found to be hexagonal. The size distribution of generated ZnO nanoparticles is decreased by increasing the Laser Pulse Energy. The rate of ZnO nanoparticles production is increased with increasing the Laser Pulse Energy and is decreased with increasing the Laser photon Energy. ZnO nanoparticles were formed with different shapes depending on the Laser Pulse Energy and Laser wavelength. The bandgap Energy for ZnO nanoparticles generated with 1064 nm Laser Pulse wavelength is calculated to be 3.59–3.89 eV.
Syed Asad Hussain - One of the best experts on this subject based on the ideXlab platform.
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cell viability and shock wave amplitudes in the endothelium of porcine cornea exposed to ultrashort Laser Pulses
Graefes Archive for Clinical and Experimental Ophthalmology, 2017Co-Authors: Syed Asad Hussain, Carles Milian, Caroline Crotti, Laura Kowalczuk, Fatima Alahyane, Zacaria Essaidi, Arnaud Couairon, Marieclaire Schanneklein, Karsten PlamannAbstract:Purpose Some forms of keratoplasty assisted by ultrashort-Pulse Lasers require performing Laser cuts close to the endothelium, which requires the knowledge of “safe” values concerning incision depth and Pulse Energy preserving endothelial cell viability. Our study aims to determine the thresholds for cell death in porcine corneas exposed to ultrashort Laser Pulses, in terms of Laser Pulse Energy and nearness of the impacts to the endothelium.
