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Article: Platinum nanoparticles spontaneously formed on HOPG

TitlePlatinum nanoparticles spontaneously formed on HOPG
Authors
Issue Date2001
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc
Citation
Applied Surface Science, 2001, v. 172 n. 1-2, p. 159-166 How to Cite?
AbstractSpontaneous deposition of platinum was observed when a piece of highly orientated pyrolytic graphite (HOPG) was immersed in acetonitrile containing PtCl 6 2-. The non-uniform and disordered Pt particles spontaneously formed could be reconstructed to more uniform and smaller nanoparticles by negatively charging the sample with a microsecond scale current pulse. Expectedly, the negative charges may be used to neutralize the residue positive charges on HOPG resulting from the spontaneous chemical redox deposition reaction. Changes in the double layer arrangement, hydrophobicity, and other interfacial properties such as surface tension could also contribute to the reconstruction. Within a range of negative charges passed, the nanoparticles became smaller in diameters but taller. Pre-treating the HOPG with a voltage of 1.0 V (Ag|AgCl) can eliminate the spontaneous deposition.
Persistent Identifierhttp://hdl.handle.net/10722/69721
ISSN
2015 Impact Factor: 3.15
2015 SCImago Journal Rankings: 0.930
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShen, Pen_HK
dc.contributor.authorChi, Nen_HK
dc.contributor.authorChan, KYen_HK
dc.contributor.authorPhillips, DLen_HK
dc.date.accessioned2010-09-06T06:16:14Z-
dc.date.available2010-09-06T06:16:14Z-
dc.date.issued2001en_HK
dc.identifier.citationApplied Surface Science, 2001, v. 172 n. 1-2, p. 159-166en_HK
dc.identifier.issn0169-4332en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69721-
dc.description.abstractSpontaneous deposition of platinum was observed when a piece of highly orientated pyrolytic graphite (HOPG) was immersed in acetonitrile containing PtCl 6 2-. The non-uniform and disordered Pt particles spontaneously formed could be reconstructed to more uniform and smaller nanoparticles by negatively charging the sample with a microsecond scale current pulse. Expectedly, the negative charges may be used to neutralize the residue positive charges on HOPG resulting from the spontaneous chemical redox deposition reaction. Changes in the double layer arrangement, hydrophobicity, and other interfacial properties such as surface tension could also contribute to the reconstruction. Within a range of negative charges passed, the nanoparticles became smaller in diameters but taller. Pre-treating the HOPG with a voltage of 1.0 V (Ag|AgCl) can eliminate the spontaneous deposition.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsuscen_HK
dc.relation.ispartofApplied Surface Scienceen_HK
dc.rightsApplied Surface Science. Copyright © Elsevier BV.en_HK
dc.titlePlatinum nanoparticles spontaneously formed on HOPGen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0169-4332&volume=172&spage=159&epage=166&date=2001&atitle=Platinum+nanoparticles+spontaneously+formed+on+HOPGen_HK
dc.identifier.emailChan, KY:hrsccky@hku.hken_HK
dc.identifier.emailPhillips, DL:phillips@hku.hken_HK
dc.identifier.authorityChan, KY=rp00662en_HK
dc.identifier.authorityPhillips, DL=rp00770en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0169-4332(00)00848-5en_HK
dc.identifier.scopuseid_2-s2.0-0035282180en_HK
dc.identifier.hkuros62411en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035282180&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume172en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage159en_HK
dc.identifier.epage166en_HK
dc.identifier.isiWOS:000166831100021-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridShen, P=7201767641en_HK
dc.identifier.scopusauthoridChi, N=7006655640en_HK
dc.identifier.scopusauthoridChan, KY=7406034142en_HK
dc.identifier.scopusauthoridPhillips, DL=7404519365en_HK

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