Modification of Polyimide Wettability by KrF Pulsed Laser Ablation

Liquid-Phase Pulsed Laser Ablation

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

Growth of Zinc Oxide Nanopores by Pulsed Laser Ablation

ZnO thin films of porous structure with strong c-axis orientation were deposited on n-type silicon substrate by pulsed laser ablation of ZnO target in low O2 pressure (around 0.03 mbar) and at 600C substrate temperature. We attribute the formation of nanopores and the crater-like formation to the high kinetic energy of the ablated particles. Photoluminescence spectra show the near band edge emi...

Growth of crystalline boron nanowires by pulsed laser ablation

Crystalline boron nanowires were grown on Pt coated sapphire substrates using pulsed laser ablation at different temperatures under a pressure of 50 Pa. High-resolution TEM and transmission electron diffraction (TED) analyses were performed to determine the crystal structure of these nanowires. These nanowires had diameters ~100 nm and lengths in the micrometer range. Systematic analyses showed...

Barium Ferrite Films Grown by Pulsed Laser Ablation

Perpendicular recording media with a high squareness in perpendicular M-H loop were developed by sputter-deposition. and their low noise property as well as high recording performances were confirmed The media with thicknesses of 30 to 200 nm were prepared on glass substrates by dc-magnetron sputtering using a Co-Crzo-Nb4 target Media of Co-Crz4 and Co-CrI8-Ta, were also prepared as the compari...