Abstract
Thin lms of acid-functionalized multiwall carbon nanotubes (O-MWCNT) with di erent concentrations and coated O-MWCNT with Fe3O4 nanoparticles (MWCNT/Fe3O4) were prepared on glass substrate at 300 ◦C by spray pyrolysis technique. In order to study the e ect of nanotubes alignment on the physical properties of carbon nanotube lms, thin lm of iron oxide nanoparticles coated carbon nanotubes was deposited under magnetic eld of 0.4 T. All samples were characterized using UV Vis spectroscopy, X-ray di raction, scanning electron microscopy, and the Hall e ect experiment. Results show that the electrical conductivity and optical transmittance of carbon nanotubes thin lms depend on the concentration of carbon nanotubes and their arrangement at the lms. Aligning carbon nanotubes in thin lms leads to an obvious improvement in electrical and optical properties of thin lms.
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