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Formation of gold nanoparticle size and density gradients via bipolar electrochemistry
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
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2016 (English)In: ChemElectroChem, ISSN 2196-0216, Vol. 3, no 3, 378-382 p.Article in journal (Refereed) Published
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Abstract [en]

Bipolar electrochemistry is employed to demonstrate the formation of gold nanoparticle size gradients on planar surfaces. By controlling the electric field in a HAuCl4-containing electrolyte, gold was reduced onto 10nm diameter particles immobilized on pre-modified thiolated bipolar electrode (BPE) templates, resulting in larger particles towards the more cathodic direction. As the gold deposition was the dominating cathodic reaction, the increased size of the nanoparticles also reflected the current distribution on the bipolar electrode. The size gradients were also combined with a second gradient-forming technique to establish nanoparticle surfaces with orthogonal size and density gradients, resulting in a wide range of combinations of small/large and few/many particles on a single bipolar electrode. Such surfaces are valuable in, for example, cell-material interaction and combinatorial studies, where a large number of conditions are probed simultaneously.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 3, no 3, 378-382 p.
Keyword [en]
Bipolar electrochemistry, Gold nanoparticles, Interfaces, Size gradients, Templated deposition
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Materials Chemistry Physical Chemistry
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URN: urn:nbn:se:ri:diva-89DOI: 10.1002/celc.201500413Scopus ID: 2-s2.0-84960193104OAI: oai:DiVA.org:ri-89DiVA: diva2:930614
Available from: 2016-05-24 Created: 2016-04-28 Last updated: 2017-01-06Bibliographically approved

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