Surface charge driven growth of eight-branched Cu2O Crystals

Katherine Self; Wuzong Zhou

doi:10.1021/acs.cgd.6b00883

Surface charge driven growth of eight-branched Cu₂O Crystals

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	5377-5384
Number of pages	8
Journal	Crystal Growth & Design
Volume	16
Issue number	9
Early online date	1 Aug 2016
DOIs	https://doi.org/10.1021/acs.cgd.6b00883
Publication status	Published - 7 Sept 2016

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10.1021/acs.cgd.6b00883

Zhou_Cu2O_MS_300716
Copyright © 2016 American Chemical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1021/acs.cgd.6b00883
Accepted author manuscript, 689 KB

EP/F019580/1 - Electron Microscopy: Electron Microscopy of Advanced Materials
Zhou, W. (PI), Irvine, J. T. S. (CoI) & Miller, A. (CoI)
EPSRC
1/10/07 → 31/03/12
Project: Standard

Cite this

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title = "Surface charge driven growth of eight-branched Cu2O Crystals",

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.",

author = "Katherine Self and Wuzong Zhou",

note = "KS would like to thank the University of St Andrews for the studentship, WZZ thanks EPSRC for the financial support to purchase the FEG SEM (EP/F019580/1).",

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AU - Zhou, Wuzong

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N2 - 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.

AB - 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.

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Surface charge driven growth of eight-branched Cu2O Crystals

Abstract

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Projects

EP/F019580/1 - Electron Microscopy: Electron Microscopy of Advanced Materials

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Surface charge driven growth of eight-branched Cu₂O Crystals