Synthesis and Properties of SiC/SiO2 Nanochain Heterojunctions by Microwave Method

SiC/SiO 2 one-dimensional nanochains and SiC/SiO 2 two-dimensional X-junction and Y-junction nanochains were synthesized by using a simple and low-cost microwave method. Structural, morphological, and elemental analysis revealed that the SiC/SiO 2 nanochains consisted of 3C-SiC strings with diameters of 20−80 nm and periodic SiO 2 beads with diameters of 100−400 nm. Spectral analysis indicated that both SiC strings and SiO 2 beads produced significant photoluminescence, and the presence of SiO 2 beads enhanced the emissions from SiC strings. On the basis of experimental characterizations, a two-step growth mechanism of the nanochains was proposed to elucidate the growth process.