Supramolecular aggregates in high magnetic fields
In case you object to the disclosure of your thesis, you can contact email@example.com
[S.l.] : s.n
Number of pages
RU Radboud Universiteit Nijmegen, 28 mei 2010
Promotor : Maan, J.C. Co-promotor : Christianen, P.C.M.
Display more detailsDisplay less details
Condensed Matter Science (HFML)
SubjectCorrelated Electron Systems / High Field Magnet Laboratory (HFML)
Creating new well-defined structures with a nanometer or micrometer length scale is of great importance, which can lead to new devices, new materials, and allows the study of fundamental physical phenomena. A promising approach for creating such structures is the use of organic molecules that spontaneously form higher dimensional structures in solution. With this process, extremely small self-repairing structures can be created in a relatively cheap and easily processable way. Almost any shape and size is possible, ranging from large spherical aggregates with a diameter in the micrometer range, to small wires of only a few nanometers thin. There are many applications, for example in the transport of light through narrow channels, as miniature gas sensors or as small capsules in drug delivery systems. In this thesis, we use magnetic fields to improve our understanding of the formation of supramolecular self-assemblies. Due to the anisotropic magnetic properties of the molecules, a supramolecular aggregate can be oriented in a magnetic field. The way it aligns, parallel or perpendicular to the magnetic field, and the field strength required for the alignment, depends on the size, degree of order, and the intermolecular organization of the aggregate. We investigate the relation between environmental aspects (like temperature and solvent) and the shape and internal structure of the resulting aggregates, we influence the shape with a magnetic field, we compare the growth process with theoretical models and we describe the kinetics of an aggregate system. Understanding these aspects leads to a better understanding of the formation process, which will allow us to build aggregates with the desired size, shape and functionality.
Upload full text
Use your RU credentials (u/z-number and password) to log in with SURFconext to upload a file for processing by the repository team.