Growth of nanoparticles and microparticles by controlled reaction-diffusion processes

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 s...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1999. - 31(2015), 5 vom: 10. Feb., Seite 1828-34
1. Verfasser: Walliser, Roché M (VerfasserIn)
Weitere Verfasser: Boudoire, Florent, Orosz, Eszter, Tóth, Rita, Braun, Artur, Constable, Edwin C, Rácz, Zoltán, Lagzi, István
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't
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520 |a 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 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
700 1 |a Boudoire, Florent  |e verfasserin  |4 aut 
700 1 |a Orosz, Eszter  |e verfasserin  |4 aut 
700 1 |a Tóth, Rita  |e verfasserin  |4 aut 
700 1 |a Braun, Artur  |e verfasserin  |4 aut 
700 1 |a Constable, Edwin C  |e verfasserin  |4 aut 
700 1 |a Rácz, Zoltán  |e verfasserin  |4 aut 
700 1 |a Lagzi, István  |e verfasserin  |4 aut 
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