Optical properties and microstructure of 2.02-3.30 eV ZnCdO nanowires: effect of thermal annealing

ZnCdO nanowires with up to 45% Cd are demonstrated showing room temperature photoluminescence (PL) down to 2.02 eV and a radiative efficiency similar to that of ZnO nanowires. Analysis of the microstructure in individual nanowires confirms the presence of a single wurtzite phase even at the highest Cd contents, with a homogeneous distribution of Cd both in the longitudinal and transverse directions. Thermal annealing at 550 °C yields an overall improvement of the PL, which is blue-shifted as a result of the homogeneous decrease of Cd throughout the nanowire, but the single wurtzite structure is fully maintained.

Indagaciones sobre los procesos de desarrollo y "mantenimiento" de software: un enfoque 3-P

Se ha convertido en costumbre justificada, desde luego atribuir genéricamente al software un conjunto de defectos: costes elevados, infiabilidad, intransportabilidad, etc. También sus procesos de desarrollo y mantenimiento tienen bien ganada reputación como infatigables manaderos de dificultades y conflictos.