Side-by-side ZnSe/ZnCdSe Bicrystalline Nanoribbons Prepared by a Two-Step Process

Abstract

By a two-step method, side-by-side bicrystalline ZnSe/ZnCdSe nanoribbons were fabricated via metalorganic chemical vapor deposition. The nanoribbons were characterized by secondary and transmission electron microscopy, and energy dispersed X-ray spectroscopy. A good epitaxial relationship and a sharp interface exist between the two crystals, despite their different crystalline orientation and composition. The lattice mismatch induced strain is fully accommodated by bending. Two mechanisms, the vapor−liquid−solid mechanism and a subsequent asymmetric epitaxy, are involved in the growth of the bicrystals. Our results show that the two-step methods, which were commonly used to fabricate core−shell and axial heterostructures, can also yield bicrystals.

One-dimensional II–VI nanostructures: Synthesis, properties and optoelectronic applications

“…Wang et al showed the growth of ZnO/ZnSe core/shell NW arrays on transparent conducting oxide substrates, which had potential applications in solar cells [70]. The formation of side-byside ZnSe/ZnCdSe bicrystalline NRs was accomplished by a two-step process employing MOCVD [71], and ZnSe/Si bicoaxial NWs were formed by one-step thermal evaporation [72]. Interestingly, it was found that CdSe quantum dots in ZnSe could function as efficient source for single photons [73].…”

Growth of ZnSe Nanospirals with Bending Mediated by Lomer−Cottrell Sessile Dislocations through Varying Pressure

“…7 In contrast to the one-stage syntheses, two-stage fabrications are generally accompanied by variations (i.e., compositions, temperature, and reaction pressure) and thus offer more flexibility in combining different materials and allow separate controls over each material in the single stage. Novel {113} twinned ZnSe bicrystal nanobelts filled with 〈111〉 twinnings 11 and side-by-side ZnSe/ZnCdSe bicrystalline nanoribbons 12 have been successfully synthesized through this method. However, reports on the two-stage fabrication of one-dimensional (1D) nanostructures are relatively limited.…”

A Versatile Chemical Vapor Deposition Method to Synthesize One-Dimensional Silica-Sheathed Nanostructures

“…Some approaches have been developed to fabricate the nanowire and the silica sheath in one step; – ,,, although maybe simple, they could not easily control the dimension of the nanowires and the silica sheath independently. Hence, a two-step method is instructive for the synthesis of the heterostructure. , Some chemical methods have been generated to fabricate nanocables at relatively low temperature, – but they are not suitable for the applications like direct integration of FETs. Furthermore, a general method is still absent to controllably coat silica sheath on series of 1D nanomaterials.…”

“…Hence, a two-step method is instructive for the synthesis of the heterostructure. 7,19 Some chemical methods have been generated to fabricate nanocables at relatively low temperature, [20][21][22] but they are not suitable for the applications like direct integration of FETs. Furthermore, a general method is still absent to controllably coat silica sheath on series of 1D nanomaterials.…”