硅掺杂碳纳米管薄膜的制备及其力学性能

Macroscopic carbon nanotube films were prepared by floating catalyst chemical vapor deposition in the presence of electron donor element Si. Scanning Electron Microscope (SEM), Transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and Laser Raman spectrometer (Raman) were utilized to evaluate the effects of Si-doping on structure and mechanical property of carbon nanotube films. Results indicated that the introduction of heteroatom into hexagonal carbon framework damaged the structure and increased the defect degrees of CNTs, therefore, some of CNTs collapsed under their own pressure. Due to the larger area contact and stronger interfacial adhesions induced by the collapse, the as-prepared Si-CNT films exhibit superior mechanical properties than raw CNT film.