Carbon's nanostructures formed in a field of powerful laser radiation

摘要

Research of an opportunity of formation of nanostructures on a surface of the graphite samples is now one of most actively developing directions of laser physics [1-4]. Development of the given branch is connected by that properties formed nanostructures essentially depend on parameters of laser radiation (length of a wave, duration of a pulse, the form of a beam), the laser systems developed recently allow to capture the big range of the given parameters that allows to expect for generation nanostructures with the set properties. In the given work as object of research it was used glass carbon (GC). Because of the amorphous structure, the given material rather easily gives in to action of laser radiation with density of power not exceeding 107 W/sm2. The specified range of intensity now is distributed enough in technological laser systems. In the carried out experiments dependences of morphological properties generated nanostructures from distance to the center of area of action are found out. It is shown, that mechanisms of their formation have the various nature. Attributes of formation of melt in the center of a laser cavity and precipitated layer from a gas phase behind borders of area of action are fixed.