Tailoring Nucleation at Two Interfaces Enables Single Crystalline NiO Nanowires via Vapor Liquid Solid Route

摘要

Here we show a rational strategy to fabricate single crystalline NiO nanowires via a vapor liquid solid (VLS) route, which essentially allows us to tailor the diameter and the spatial position. Our strategy is based on the suppression of the nucleation at vapor solid (VS) interface, which promotes nucleation only at the liquid solid (LS) interface. Manipulating both the supplied material fluxes (oxygen and metal) and the growth temperature enables enhancement of the nucleation only at the LS interface. Furthermore, this strategy allows us to reduce the growth temperature of single crystalline NiO nanowires down to 550 degrees C, which is the lowest growth temperature so far reported.