In most cases, the silicon carbide nanotubes have been fabricated with assistance of some templates. Unlike carbon nanotubes, the silicon carbide nanotubes contain two types of elements, silicon and carbon; therefore, the structure of the SiC nanotube is basically different from that of the carbon nanotube. In fact, most of the currently reported SiC nanotubes are not standard sp2-bonded nanotubes and instead, the walls of these nanotubes have sp3-bonded bulk-SiC-like crystal structures. Some are only the rolled-up nanostructures of bulk SiC, and others are composed of polycrystalline SiC particles. Several factors account for the difficulty in synthesizing actual SiC nanotubes or two-dimensional honeycomb-structured monolayers. Firstly, the Si atoms on the surface of the SiC nanotubes or monolayers are readily oxidized even at room temperature and this will destroy the honeycomb structure. Secondly, the theoretical study shows that the SiC nanowires may be more stable than the SiC nanotubes of the same diameter in the common experimentally approachable (a few nanometers or larger) size regime. Thirdly, unlike graphene which can be readily prepared by exfoliation of layer-structured graphite, there is no graphite-like sp2-structured SiC crystal in nature from which the actual SiC monolayers or rolled nanotubes could be readily extracted. Therefore, the research field of SiC nanotubes and monolayers is somewhat strange in that the experimentalists often (not always) synthesize bulk-like sp3-structured SiC nanotubes or ultrathin SiC layers, whereas the theorists generally investigate the structures and properties of actual sp2-structured SiC nanotubes or monolayers. However, there have been some breakthroughs in the synthesis of sp2-structured SiC in recent years, although still in infancy.