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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Friedrich, Thomas Michaelis, Maria Römer, Florian M. Mehdizadeh Taheri, Sara Narayanan, Theyencheri Weber, Birgit Rehberg, Ingo Förster, Stephan Förster, Beate Bösecke, Peter Drechsler, Markus Rosenfeldt, Sabine |
| Description | Author Affiliation: Mehdizadeh Taheri S ( Physical Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany); Michaelis M ( Physical Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany); Friedrich T ( Experimental Physics V, University of Bayreuth, 95440 Bayreuth, Germany); Förster B ( Macromolecular Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany); Drechsler M ( Physical Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany); Römer FM ( Fakultät für Physik, University Duisburg-Essen, 47057 Duisburg, Germany); Bösecke P ( European Synchrotron Radiation Facility, 38043 Grenoble, France); Narayanan T ( European Synchrotron Radiation Facility, 38043 Grenoble, France); Weber B ( Inorganic Chemistry II, University of Bayreuth, 95440 Bayreuth, Germany.); Rehberg I ( Experimental Physics V, University of Bayreuth, 95440 Bayreuth, Germany); Rosenfeldt S ( Physical Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany); Förster S ( Physical Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany); |
| Abstract | The assembly of tiny magnetic particles in external magnetic fields is important for many applications ranging from data storage to medical technologies. The development of ever smaller magnetic structures is restricted by a size limit, where the particles are just barely magnetic. For such particles we report the discovery of a kind of solution assembly hitherto unobserved, to our knowledge. The fact that the assembly occurs in solution is very relevant for applications, where magnetic nanoparticles are either solution-processed or are used in liquid biological environments. Induced by an external magnetic field, nanocubes spontaneously assemble into 1D chains, 2D monolayer sheets, and large 3D cuboids with almost perfect internal ordering. The self-assembly of the nanocubes can be elucidated considering the dipole-dipole interaction of small superparamagnetic particles. Complex 3D geometrical arrangements of the nanodipoles are obtained under the assumption that the orientation of magnetization is freely adjustable within the superlattice and tends to minimize the binding energy. On that basis the magnetic moment of the cuboids can be explained. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 47 |
| Volume Number | 112 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2015-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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