Temperature behaviour of the average size of nanoparticle lattices co-deposited with an amorphous matrix. Analysis of Ge + Al2O3 and Ni + Al2O3 thin films
| Autor: | Tihomir Car, Maja Buljan, Stefano Antonio Mezzasalma, Nikolina Nekić, Marko Jerčinović |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Characteristic length Condensed matter physics business.industry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Amorphous solid Surface tension Crystallography Condensed Matter::Materials Science Semiconductor Quantum dot 0103 physical sciences Molecule General Materials Science Thin film 010306 general physics 0210 nano-technology business Dimensionless quantity nanoparticle lattice thin amorphous oxide films continuum thermodynamic theories thermal effects sputtering |
| DOI: | 10.1088/1361-648x/aa7f3c |
| Popis: | We theoretically interpret the thermal behaviour of the average radius versus substrate temperature of regular quantum dot/nanocluster arrays formed by sputtering semiconductor/metal atoms with oxide molecules. The analysis relies on a continuum theory for amorphous films with given surface quantities, perturbed by a nanoparticle lattice. An account of the basic thermodynamic contributions is given in terms of force-flux phenomenological coefficients of each phase (Ge, Ni, Al2O3). Average radii turn out to be expressible by a characteristic length scale and a dimensionless parameter, which mainly depend upon temperature through diffusion lengths, film pressures and finite-size corrections to interfacial tensions. The numerical agreement is good in both Ge ([Formula: see text]) and Ni ([Formula: see text]) lattices grown at temperatures [Formula: see text]800 K, despite the lower temperature behaviour of quantum dots seeming to suggest further driving forces taking part in such processes. |
| Databáze: | OpenAIRE |
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