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Electrostatic repulsion-controlled formation of polydopamine-gold Janus particles

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dc.contributor.authorXu, H.
dc.contributor.authorLiu, X.
dc.contributor.authorSu, G.
dc.contributor.authorZhang, B.
dc.contributor.authorWang, D.
dc.date.issued2012
dc.description.abstractPolydopamine (PDA)-Au Janus particles were obtained by simply adding HAuCl4 to a PDA particle suspension, prepared via self-polymerization of dopamine in basic solution at room temperature. The structures of the PDA-Au particles are readily controlled by electrostatic repulsion between the constituent particles, which can be realized simply via adjusting the environmental pH. PDA-Au Janus particles are formed only in a narrow pH range of 2.5-3.0 due to the properly enhanced electrostatic repulsion between the Au particles growing on as-prepared PDA particles and between the Au and PDA particles. The obtained PDA-Au Janus particles can become interfacially active and self-assemble at oil/water interfaces as a result of spatially well-separated hydrophilic (PDA) and hydrophobic (Au) domains on the surfaces, reminiscent of amphiphilic molecules.
dc.identifier.citationLangmuir, 2012; 28(36):13060-13065
dc.identifier.doi10.1021/la302394e
dc.identifier.issn0743-7463
dc.identifier.issn1520-5827
dc.identifier.orcidXu, H. [0000-0002-9126-1593]
dc.identifier.urihttps://hdl.handle.net/1959.8/132082
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.relation.fundingARC DE120100042
dc.relation.fundingARC DP110104179
dc.relation.fundingARC DP120102959
dc.rightsCopyright 2012 American Chemical Society
dc.source.urihttps://doi.org/10.1021/la302394e
dc.subjectChlorides
dc.subjectGold
dc.subjectGold Compounds
dc.subjectIndoles
dc.subjectPolymers
dc.subjectMolecular Structure
dc.subjectParticle Size
dc.subjectSurface Properties
dc.subjectStatic Electricity
dc.titleElectrostatic repulsion-controlled formation of polydopamine-gold Janus particles
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9915909552901831

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