Assembly behavior of iron oxide-capped Janus particles in a magnetic field

© 2011 American Chemical Society

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 28(2012), 2 vom: 17. Jan., Seite 1149-56
1. Verfasser: Ren, Bin (VerfasserIn)
Weitere Verfasser: Ruditskiy, Aleksey, Song, Jung Hun Kevin, Kretzschmar, Ilona
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a Three types of iron oxide Janus particles are obtained by varying the deposition rate of iron in a 3:1 Ar/O(2) atmosphere during physical vapor deposition. Each type of iron oxide Janus particle shows a distinct assembly behavior when an external magnetic field is applied, i.e., formation of staggered chains, double chains, or no assembly. A detailed deposition rate diagram is obtained to identify the relationship between deposition rate and assembly behavior. The extent of iron oxidation is identified as the key parameter in determining the assembly behavior. In addition, the effects of particle volume fraction, thickness of the iron oxide cap, and assembly time on the final assembly behavior are studied. Cap thickness is shown not to influence the assembly behavior, while particle volume fraction and assembly time affect the chain growth rate and the chain length, but not the overall assembly behavior. The samples are characterized by optical, scanning electron, and atomic force microscopies 
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700 1 |a Ruditskiy, Aleksey  |e verfasserin  |4 aut 
700 1 |a Song, Jung Hun Kevin  |e verfasserin  |4 aut 
700 1 |a Kretzschmar, Ilona  |e verfasserin  |4 aut 
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