Formation of three-dimensional lead telluride nanoislands on strained barium fluoride (111) surface

Autor:	A. P. Bakhtinov, V. N. Vodop’yanov, E.I. Slynko
Rok vydání:	2006
Předmět:	Supersaturation chemistry.chemical_compound Monatomic ion Number density Materials science Physics and Astronomy (miscellaneous) Condensed matter physics chemistry Thermodynamic equilibrium Barium fluoride Nucleation Slip (materials science) Lead telluride
Zdroj:	Technical Physics Letters. 32:167-170
ISSN:	1090-6533 1063-7850
Popis:	The nucleation and growth of three-dimensional lead telluride (PbTe) nanoislands from vapor phase on BaF2(111) substrates strained by an external load under conditions close to thermodynamic equilibrium have been studied. Evolution of the shape of nanoislands was traced and their size distribution was statistically analyzed as dependent on the character of straining of the substrate. Homogeneous arrays of faceted PbTe nanoislands with an ultrahigh surface number density (above 1011 cm−2) and an average height of h1 ∼ 3.5 nm (at a 8–9% rms deviation) are obtained for the first time on elastoplastically strained BaF2(111) substrates under the conditions of small vapor supersaturation in the condensation zone. The formation of nanoisland arrays with such parameters is possible due to (i) the heterogeneous nucleation of PbTe nanoislands at the surface monatomic slip steps aligned in the 〈110〉 direction and (ii) the influence of straining on the kinetic processes on the substrate surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4ebc669592cc3b06e156bb0e24ead3e3 https://doi.org/10.1134/s1063785006020258 Zobrazit plný text záznamu Plný text ve formátu PDF