As-Flux-Induced Diameter Control in GaAs Nanowires.

ABSTRACT: Controlling the diameter of self-catalyzed III-V nanowires is important for tailoring their performance in optoelectronic applications. Here, we investigate the impact of abrupt or gradual increase of the V/III flux ratio on the GaAs nanowire diameter. A dynamic model of nanowire diameter is developed to explain the changes induced by flux ratio modulation: (i) shrinkage of the catalyst droplet under elevated As flux and (ii) convergence toward a critical diameter governed by the flux ratio during subsequent nanowire elongation. The different diameter behaviors observed under abrupt or gradual flux increase are elucidated by this relationship, through which we present a quantitative analysis of the relationship between the nanowire diameter and the V/III flux ratio. Epitaxial Ge shells wer

SUBMITTER: Yin Z 

PROVIDER: S-EPMC12498496 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature