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Kilian et al. – Temperature induced diameter variation of silicon nanowires via a liquid–solid phase transition in the Zn seed – Chemical Communications, 2021, 57, 12504-12507

Seamus Kilian, Temilade Esther Adegoke, Syed Abdul Ahad, Hugh Geaney, Tadhg Kennedy * and Kevin M. Ryan *

Bernal Institute and Department of Chemical Sciences, University of Limerick, Limerick, Ireland. E-mail: kevin.m.ryan@ul.ietadhg.kennedy@ul.ieReceived 11th August 2021 , Accepted 25th October 2021
First published on 1st November 2021 DOI: 10.1039/D1CC04427C 
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Herein, we demonstrate the ability of Zn to catalyze the growth of Si nanowires via reaction temperature determined, vapour–liquid–solid (VLS) or vapour–solid–solid (VSS) growth mechanisms. This is the first reported use of a type B catalyst to grow Si nanowires via the VSS mechanism to our knowledge whereby the highly faceted Zn seeds resulted in an increased NW diameter. This was used to induce diameter variations along the axial length of individual nanowires by transitioning between VLS and VSS growth.