Abstract
This study proposes an efficient approach that uses a 1064nm continuous fiber laser to achieve nanoscale welding of crossed multiwalled carbon nanotubes (MWCNTs). We investigate the effects of laser irradiation time (from 1 to 6s) on the structure changes and the welding quality of crossed MWCNTs using a scanning electron microscope, transmission electron microscope, and Raman spectroscopy. The experimental results demonstrate that (1)after 2 or 3s laser irradiation, moderate temperature of MWCNTs can be formed and can cause a higher degree of graphitization and (2)the degree of graphitization and effective contact of nanowelded MWCNT junctions strongly affects its electrical properties.
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