Sequential tasks performed by catalytic pumps for colloidal crystallization
Afshar Farniya, Ali (Institut Català de Nanociència i Nanotecnologia)
Esplandiu Egido, Maria José (Institut Català de Nanociència i Nanotecnologia)
Bachtold, Adrian (Institut de Ciències Fotòniques)

Date:	2014
Abstract:	Gold-platinum catalytic pumps immersed in a chemical fuel are used to manipulate silica colloids. The manipulation relies on the electric field and the fluid flow generated by the pump. Catalytic pumps perform various tasks, such as the repulsion of colloids, the attraction of colloids, and the guided crystallization of colloids. We demonstrate that catalytic pumps can execute these tasks sequentially over time. Switching from one task to the next is related to the local change of the proton concentration, which modifies the colloid potential and, consequently, the electric force acting on the colloids.
Grants:	Ministerio de Ciencia e Innovación FIS2009-11284 Ministerio de Economía y Competitividad MAT2012-31338
Note:	Altres ajuts: European Union (ERC-carbonNEMS project) ; Catalan government(AGAUR, SGR).
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Colloidal crystallization ; Sequential task
Published in:	Langmuir, Vol. 30, Num. 39 (September 2014) , p. 11841-11845, ISSN 1520-5827

DOI: 10.1021/la503118t

21 p, 1.3 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles