Atomic resolution monitoring of cation exchange in CdSe-PbSe hetero-nanocrystals during epitaxial solid-solid-vapor growth

AO Yalcin, Z Fan, B Goris, WF Li, R de Koster, C Fang, A van Blaaderen, M Casavola, FD Tichelaar, S Bals, G van Tenderloo, TJH Vlugt, D Vanmaekelbergh, HW Zandbergen, MA van Huis

Research output: Contribution to journalArticleScientificpeer-review

34 Citations (Scopus)

Abstract

Here, we show a novel solid-solid-vapor (SSV) growth mechanism whereby epitaxial growth of heterogeneous semiconductor nanowires takes place by evaporation-induced cation exchange. During heating of PbSe-CdSe nanodumbbells inside a transmission electron microscope (TEM), we observed that PbSe nanocrystals grew epitaxially at the expense of CdSe nanodomains driven by evaporation of Cd. Analysis of atomic-resolution TEM observations and detailed atomistic simulations reveals that the growth process is mediated by vacancies.
Original languageEnglish
Pages (from-to)3661-3667
Number of pages7
JournalNano Letters: a journal dedicated to nanoscience and nanotechnology
Volume14
Issue number6
DOIs
Publication statusPublished - 2014

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