Jaime Andrés Pérez Taborda

Correlation between optical, morphological and compositional properties of Aluminum Nitride thin films by Pulsed Laser Deposition

J.A.Perez acknowledges Santander bank and your scholarship program “Young Professors and Researchers Latin America, Santander Universities” (Spain, 2015).

PELÍCULAS NANOESTRUCTURADAS DE OXIDO DE ZINC (ZnO)

In this article we has done a review of research articles about the zinc oxide (ZnO) thin films properties, their potential applications, characterization technique and growth method.

Caracterización por DRX y espectrofotometría UV-VIS de películas de ZnO depositadas por pld.

ZnO films were deposited by pulsed laser ablation employing different temperatures and gas pressures. It was used as a target a tablet made from available commercial ZnO powder. The films were grown on glass substrates treated by chemical Cleanliness. The samples were characterized by X ray diffraction and Uv-Vis spectrophotometry as a function of substrate temperature and gas pressure. The ZnO exhibits hexagonal wurtzite structure with preferential orientation along c-axis direction. It was found that the best quality films were obtained at substrate temperature of 300oC and at gas pressure of 26,7 Pa. At room temperature films exhibit ZnO hexagonal phase with low crystallinity. At low pressures thin films do not generate ZnO phases.

DIAGNOSTICO DE UN PLASMA POR SONDA DE LANGMUIR.

Para las plumas en ablacion laser, las cuales son significativamente ionizadas, la sonda de Langmuir ha demostrado ser una herramienta relativamente simple y barata para medir la forma de la pluma, la distribucion de energia de los iones y la temperatura electronica. En este trabajo describimos algunas consideraciones teoricas sobre el desarrollo de la sonda de Langmuir para el diagnostico de la pluma del plasma producido por ablacion laser.