Carbon nano-structures were doped by boron atoms to synthesize icosahedral boron carbide using Hot Filament Chemical Vapor Deposition method. Raman spectroscopy revealed two broad peaks centered on 1,334 and 1,573cm(-1), the origin of which is sp(3) hybrid of diamond (D-band) and sp(2) hybrid of graphite (G-band), respectively. These peaks stem from aromatic compounds with sp(2) hybrid, demonstrating a local collection of amorphous B13C2 on the substrate surface. Furthermore, D and G peaks are illustrative of more damage inside the structure. X-ray diffraction patterns indicated significant peaks assigned to icosahedral (B13C2) structures in planes (012), (021), and (024). Debye-Scherrer calculation showed that, the crystal size of the products was in range of 5-80nm. Additionally, the graphite grain size was evaluated by Tuinstra-Koenig formula at a 42-73nm interval. The decrease observed in the intensity of G and D peaks may stem from disrupting the vibrational behavior of the film and diminution of polarizability in the molecules of the lattice. One of the factors inducing the decrease of polarizability the promotion of is a great fraction of delta bonds between B-C atoms. Scanning electron microscopy results showed cauliflowers morphology for the nanostructures.