title: Heteroepitaxial Si/ZnO hierarchical nanostructures for future optoelectronic devices.
abstract: The synthesis of highly-ordered ultra-dense heteroepitaxial Si/ZnO hierarchical nanostructures by a simple and cost-effective approach is demonstrated. We also show, based on the same approach, the synthesis of ZnO nanoparticle-decorated Si nanowire cores and Si/ZnO conformal core-shell hetero-nanostructures. The as-synthesized ZnO nanobranches on Si nanowire cores exhibit an epitaxial relationship as (111)Si/(100) ZnO. Excellent control over the composition, dimensions, and density of ZnO branches on Si cores has been achieved. Thus, in future, this family of well-controlled, high-quality Si/ZnO hierarchical hetero-nanostructures could play a role as multifunctional candidates in the fabrication of optoelectronic devices, particularly for the development of a new generation of solar-cell devices.
authors.affiliation: School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel.
authors.forename: Mudusu
authors.initials: M
authors.lastname: Devika
authors.forename: Nandanapalli Koteeswara
authors.initials: NK
authors.lastname: Reddy
authors.forename: Alexander
authors.initials: A
authors.lastname: Pevzner
authors.forename: Fernando
authors.initials: F
authors.lastname: Patolsky