Growth of Nanoparticles and Microparticles by Controlled Reaction-Diffusion Processes

Walliser, Roché M. and Boudoire, Florent and Orosz, Eszter and Tóth, Rita and Braun, Artur and Constable, Edwin C. and Rácz, Zoltán and Lagzi, István. (2015) Growth of Nanoparticles and Microparticles by Controlled Reaction-Diffusion Processes. Langmuir, 31 (5). pp. 1828-1834.

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Official URL: http://edoc.unibas.ch/dok/A6348554

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The synthesis of different sizes of nanoparticles and microparticles is important in designing nanostructured materials with various properties. Wet synthesis methods lack the flexibility to create various sizes of particles (particle libraries) using fixed conditions without the repetition of the steps in the method with a new set of parameters. Here, we report a synthesis method based on nucleation and particle growth in the wake of a moving chemical front in a gel matrix. The process yields well-separated regions (bands) filled with nearly monodisperse nanoparticles and microparticles, with the size of the particles varying from band to band in a predictable way. The origin of the effect is due to an interplay of a precipitation reaction of the reagents and their diffusion that is controlled in space and time by the moving chemical front. The method represents a new approach and a promising tool for the fast and competitive synthesis of various sizes of colloidal particles.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
UniBasel Contributors:Constable, Edwin Charles and Walliser, Roche Marcel
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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edoc DOI:
Last Modified:01 Jul 2020 09:44
Deposited On:10 Apr 2015 09:12

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