I know how to create the nanowire using Materials Studio. The difference between the nannowire and the nanorod is the aspect ratio.
But I am not sure where should I fix the width and length of the nanorod. My system is mixer of $\ce{WO3}$ (space group is $221$; Pm-3m) and WC (Space group is $187$; P-6m2). We can see it as $\ce{WO_{(3-x)}}$ and $\ce{WC_x}$.
Any help will be very much helpful.