Formation of fractal structures by aggregation of anisometric iron (III) hydroxide particles |
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| Institution: | 1. Abteilung Experimentelle Physik, Universität Ulm, 86069 Ulm, Germany;2. Department of Physical Chemistry, Technical University of Budapest, H-111 Budapest, Egry J. u. 20-22, Hungary;1. Institute of Technology for Nanostructures (NST) and Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen, Duisburg D-47057, Germany;2. Institute for Combustion and Gas Dynamics, and Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen, Duisburg D-47057, Germany;1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;2. Guangdong Provincial Key Laboratory of Distributed Energy Systems, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China;1. Department of Chemistry, University of California at Berkeley, Berkeley, CA, 94720, USA;2. Department of Physics, University of California at Berkeley, Berkeley, CA, 94720, USA;3. Kavli Energy NanoSciences Institute at the University of California, Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;4. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA;5. Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, CA, 94450, USA;6. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA;1. Department of Mechanical and Aerospace Engineering, Old Dominion University, Norfolk, VA 23529, USA;2. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;3. Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca NY 14853, USA |
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| Abstract: | Coagulation of anisometric iron (III) hydroxide sols has been studied by dynamic light scattering, TEM and ultra-small-angle X-ray scattering. The anisometry of rod-like individual colloidal particles can be characterised with a mean aspect ratio of 10. It was established for the first time, that the aggregates formed by coagulation of anisometric particles show definite fractal structure with a mass fractal dimension of 1.95 ± 0.05. |
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