Surface charge driven growth of eight-branched Cu2O Crystals

Katherine Self, Wuzong Zhou

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
11 Downloads (Pure)

Abstract

Cu2O crystals are synthesised hydrothermally with an 8-branched morphology, which can undergo a transition to a cubic shape by increasing the reaction time. The rapid branch formation of these structures is studied over time using SEM, TEM, SAED, PXRD and TGA. The formation of Cu2+/PVP soft matter clusters is shown to play a key role in the reduction of Cu2+, the nucleation of Cu2O crystals and the rapid growth of branches along all eight equivalent <111> directions of the cubic Cu2O struc- ture, due to the presence of negatively charged hydroxyl sites on the {111} surfaces. This non-classical crystal growth mechanism, which relies on aggregation of the precursor on the crystal surface, may help us to understand the formation of many abnormal crystal morphologies.
Original languageEnglish
Pages (from-to)5377-5384
Number of pages8
JournalCrystal Growth & Design
Volume16
Issue number9
Early online date1 Aug 2016
DOIs
Publication statusPublished - 7 Sept 2016

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