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Article: Fabrication of nanometer-to-micron sized Cu 2O single crystals by electrodeposition

TitleFabrication of nanometer-to-micron sized Cu 2O single crystals by electrodeposition
Authors
KeywordsCu 2O single crystals
Cuprous oxide
Electrodeposition
Nanocrystals
Octahedral
Issue Date2011
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta
Citation
Electrochimica Acta, 2011, v. 56 n. 22, p. 7686-7695 How to Cite?
AbstractNanometer-to-micron sized cuprous oxide (Cu 2O) single crystals were fabricated on Au/Pd sputter-coated silicon wafer and stainless steel cathode substrates by electrodeposition in CuSO 4 at pH 4.0 at room temperature (25 °C) with no additives. The Cu 2O crystals were generally of an octahedral shape with sizes ranging from 100 nm to 400 nm on Si wafer, and 1 μm to 3 μm on stainless steel substrates respectively. Very small crystals of a spherical shape were also observed under low applied voltage. Transient crystal shapes observed on the cathode near the electrolyte surface suggest that growth slows down once {1 1 1} free surfaces are formed, and this explains the robust observation of the octahedral crystal shape. The effect of electrodeposition parameters such as deposition voltage and deposition time on the size of the crystals and their coverage on the substrates was investigated. Apart from the cathode, similar octahedral Cu 2O nanocrystals were also found to deposit on the Cu anode used. This work provides a method to fabricate Cu 2O crystals on both electrodes in a single step. © 2011 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139396
ISSN
2015 Impact Factor: 4.803
2015 SCImago Journal Rankings: 1.391
ISI Accession Number ID
Funding AgencyGrant Number
University Grants Committee of the Hong Kong Special Administration Region, PR ChinaSEG-HKU06
Croucher Foundation
Funding Information:

The work described in this paper was supported by a grant from the University Grants Committee (Project No. SEG-HKU06) of the Hong Kong Special Administration Region, PR China. A.H.W. Ngan would like to acknowledge support in the form of a Senior Research Fellowship from the Croucher Foundation. The authors would like to thank Tecford Trading & Technology Co. Ltd. for supplying the stainless steel materials. Technical assistance from Frankie Chan of the Electron Microscope Unit of the University of Hong Kong is gratefully acknowledged.

References

 

DC FieldValueLanguage
dc.contributor.authorNg, SYen_HK
dc.contributor.authorNgan, AHWen_HK
dc.date.accessioned2011-09-23T05:49:07Z-
dc.date.available2011-09-23T05:49:07Z-
dc.date.issued2011en_HK
dc.identifier.citationElectrochimica Acta, 2011, v. 56 n. 22, p. 7686-7695en_HK
dc.identifier.issn0013-4686en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139396-
dc.description.abstractNanometer-to-micron sized cuprous oxide (Cu 2O) single crystals were fabricated on Au/Pd sputter-coated silicon wafer and stainless steel cathode substrates by electrodeposition in CuSO 4 at pH 4.0 at room temperature (25 °C) with no additives. The Cu 2O crystals were generally of an octahedral shape with sizes ranging from 100 nm to 400 nm on Si wafer, and 1 μm to 3 μm on stainless steel substrates respectively. Very small crystals of a spherical shape were also observed under low applied voltage. Transient crystal shapes observed on the cathode near the electrolyte surface suggest that growth slows down once {1 1 1} free surfaces are formed, and this explains the robust observation of the octahedral crystal shape. The effect of electrodeposition parameters such as deposition voltage and deposition time on the size of the crystals and their coverage on the substrates was investigated. Apart from the cathode, similar octahedral Cu 2O nanocrystals were also found to deposit on the Cu anode used. This work provides a method to fabricate Cu 2O crystals on both electrodes in a single step. © 2011 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electactaen_HK
dc.relation.ispartofElectrochimica Actaen_HK
dc.subjectCu 2O single crystalsen_HK
dc.subjectCuprous oxideen_HK
dc.subjectElectrodepositionen_HK
dc.subjectNanocrystalsen_HK
dc.subjectOctahedralen_HK
dc.titleFabrication of nanometer-to-micron sized Cu 2O single crystals by electrodepositionen_HK
dc.typeArticleen_HK
dc.identifier.emailNgan, AHW:hwngan@hkucc.hku.hken_HK
dc.identifier.authorityNgan, AHW=rp00225en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.electacta.2011.06.053en_HK
dc.identifier.scopuseid_2-s2.0-80052271427en_HK
dc.identifier.hkuros194877en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052271427&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume56en_HK
dc.identifier.issue22en_HK
dc.identifier.spage7686en_HK
dc.identifier.epage7695en_HK
dc.identifier.isiWOS:000295303700037-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridNg, SY=42962183900en_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK
dc.identifier.citeulike9491237-

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