Un modelo teórico para la creación de nanotubos de ZnO: un estudio semi-empírico termodinámico
Abstract
Las funciones termodinámicas para poner a prueba la construcción de nanotubos de ZnO fueron investigadas por el método de cálculos semi-empíricos PM6. Se encontró que la prioridad para construir nanotubos de ZnO tetragonales es por unidades tetragonales periódicas (I) y que los nanotubos de ZnO tetragonales con un N = 4 de longitud fueron más favorables que los construidos por las unidades periódicas tetragonales y que los de una capa (I). Además, los nanotubos de ZnO hexagonales, que fueron construidos a partir de la unidad periódica hexagonal (VI), fueron más espontáneos, ya que tienen una mayor espontaneidad que los nanotubos de ZnO tetragonales. La parte añadida (II) para construir los diámetros de los nanotubos de ZnO fue la más favorable. Se estableció que la entropía no tuvo una influencia real en estos procesos de construcción.
The thermodynamic functions to test the ZnO nanotubes building were investigated by the semi-empirical method PM6 calculations. It was found that the priority to build tetragonal ZnO nanotubes is by tetragonal periodic units (I) and that tetragonal ZnO nanotubes with a N=4 length were more favourable than those constructed by the tetragonal periodic units and than those of one layer (I). Also, hexagonal ZnO nanotubes, which were built from the hexagonal periodic unit (VI), were more spontaneous since they have more spontaneity than the tetragonal ZnO nanotubes. The added part (II) to build the diameters of ZnO nanotubes was the most favourable. It was established that the entropy didn't have a real influence on these building processes.
The thermodynamic functions to test the ZnO nanotubes building were investigated by the semi-empirical method PM6 calculations. It was found that the priority to build tetragonal ZnO nanotubes is by tetragonal periodic units (I) and that tetragonal ZnO nanotubes with a N=4 length were more favourable than those constructed by the tetragonal periodic units and than those of one layer (I). Also, hexagonal ZnO nanotubes, which were built from the hexagonal periodic unit (VI), were more spontaneous since they have more spontaneity than the tetragonal ZnO nanotubes. The added part (II) to build the diameters of ZnO nanotubes was the most favourable. It was established that the entropy didn't have a real influence on these building processes.
Description
Vol. 33, No. 2