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Formation of Gold Nanoparticle Size and Density Gradients via Bipolar Electrochemistry

Anders Lundgren (Institutionen för fysik, Teoretisk fysik (Chalmers)) ; S. Munktell ; M. Lacey ; Mattias Berglin ; F. Bjorefors
Chemelectrochem (2196-0216). Vol. 3 (2016), 3, p. 378-382.
[Artikel, refereegranskad vetenskaplig]

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 10 nm 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.

Nyckelord: bipolar electrochemistry, gold nanoparticles, interfaces, size gradients, templated deposition, electrodes, arrays, architecture, fabrication, separation, particles



Denna post skapades 2016-04-18. Senast ändrad 2016-04-22.
CPL Pubid: 234851

 

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Institutioner (Chalmers)

Institutionen för fysik, Teoretisk fysik (Chalmers)
Institutionen för kemi och molekylärbiologi (GU)

Ämnesområden

Kemi

Chalmers infrastruktur