Abstract
The synthesis of III–V semiconductor nanowires (NWs) is based on the delivery of atomsfrom a vapor phase to a catalytic metal nanoparticle (NP). Although there hasbeen extensive work on such systems, the incorporation pathways of group Vatoms remain an open issue. Here, we have performed a detailed structural andchemical analysis of the catalyst NP in NWs where we switch the V atomic elementduring growth (heterostructured InP/InAs/InP NWs). Our experimental resultsindicate a group V pathway where these atoms actually diffuse through the catalyticNP by formation of a stable phase containing As under growth conditions. Wehave observed distinct NW growth behavior within a narrow temperature range (30 °C) suggesting a transition between vapor–liquid–solid and vapor–solid–solid growth modes.
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