CdS nanocubes formed in phosphatidylcholin-based template phases

  • The paper is focused on the characterization and use of phosphatidylcholine (PC)-based inverse microemulsions as a template phase for the CdS nanoparticle formation. The optically clear, isotropic phase in the oil corner was identified as a "classicalö water-in-oil microemulsion by means of NMR-diffusion measurements. Because of the very small dimensions of the water droplets, the isotropic phase shows a Newtonian-like flow behavior, and adequate amounts of bulk water cannot be detected by DSC. It is demonstrated that this w/o microemulsion can be used successfully as a nanoreactor for the formation of CdS nanoparticles with diameters of 4-5 nm. During the following process of solvent evaporation the individual small CdS nanoparticles aggregate to significant larger cubic nanoparticles, with an edge length of 2-40 nm, arranged in well-defined mosaic-like superstructures. In presence of SDS the nanocubes were stable up to 800 °C. It has to be stated here that polyelectrolytes prevent the formation of such well-ordered superstructures.

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Author:Joachim Kötz, Nicole Jagielski, Sabine Kosmella, Alwin Friedrich, Erich Kleinpeter
ISSN:0927-7757 - 288 (2006), 1-3, S
Document Type:Article
Year of first Publication:2006
Year of Completion:2006
Release Date:2017/03/25
Source:Colloids and Surfaces A-Physicochemical and engineering aspects. - ISSN 0927-7757 - 288 (2006), 1-3, S. 36 - 43
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert