SYNTHESIS OF INDIUM PHOSPHIDE / ZINC PHOSPHATECORE-SHELL NANOWIRES

[摘要] Zn3(PO4)2/InP core-shell nanowires were grown by a one-step pyrolytic synthesis in a vapor of hydrazine containing 3mol.% H2O. InP+Zn and InP+ZnO were used as sources for producing volatile species that were forming nanowires in the cold zone of a reactor. The cores were crystalline InP, while the zinc phosphate shells had amorphous structure because the growth temperature (500C) was insufficient for their crystallization. The most favorable thermochemical reactions that may produce core and shell materials were evaluated. It was established that the amorphous Zn3(PO4)2 shell was growing by a template-based Vapor-Solid method. InP core and ring-shaped Zn3(PO4)2 shell, formed at the initial stage of synthesis, served as templates for the growth of shell. The nanotubes of zinc phosphate were produced at 540C, when the source contained a low amount of InP. This happened because the template-based growth of a shell proceeded even after the growth of InP core was stopped.

[学科分类] 生物技术

[关键词] Zinc phosphate;Core-shell;nanowire;InP;Hydrazine;Amorphous;nanostructure