Diffusivity of adatoms on plasma-exposed surfaces determined from the ionization energy approximation and ionic polarizability

Das Arulsamy, Andrew & Ostrikov, Kostya (2009) Diffusivity of adatoms on plasma-exposed surfaces determined from the ionization energy approximation and ionic polarizability. Physics Letters A, 373(26), pp. 2267-2272.

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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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9 citations in Scopus
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14 citations in Web of Science®

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ID Code: 73924
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Activation energy, Atomic and displacement polarizabilities, Ionization energy, Plasma-based nanoassembly, Quantum dots, Surface diffusion
DOI: 10.1016/j.physleta.2009.04.057
ISSN: 0375-9601
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 15 Jul 2014 02:07
Last Modified: 16 Jul 2014 01:01

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