Diffusivity of adatoms on plasma-exposed surfaces determined from the ionization energy approximation and ionic polarizability |
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Authors: | Andrew Das Arulsamy Kostya Ostrikov |
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Institution: | a School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia b CSIRO Materials Science and Engineering, PO Box 218, Lindfield NSW 2070, Australia |
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Abstract: | Microscopic surface diffusivity theory based on atomic ionization energy concept is developed to explain the variations of the atomic and displacement polarizations with respect to the surface diffusion activation energy of adatoms in the process of self-assembly of quantum dots on plasma-exposed surfaces. These polarizations are derived classically, while the atomic polarization is quantized to obtain the microscopic atomic polarizability. The surface diffusivity equation is derived as a function of the ionization energy. The results of this work can be used to fine-tune the delivery rates of different adatoms onto nanostructure growth surfaces and optimize the low-temperature plasma based nanoscale synthesis processes. |
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Keywords: | Quantum dots Ionization energy Atomic and displacement polarizabilities Surface diffusion Activation energy Plasma-based nanoassembly |
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