title: The mechanism of Bi nanowire growth from Bi/Co immiscible composite thin films.
abstract: Single crystalline Bi nanowires were grown by extrusion from Bi/Co thin films. The films were obtained by thermal evaporation in high vacuum. The average diameter, length and density of obtained nanowires were 100 nm, 30 microm and 6.5 x 10(5) cm(-2), respectively. The non-catalyzed self-organized process of whisker formation on the surface of immiscible composite thin film was exploited for nanowire growth. It was shown that the whiskers had formed during and after a thin film deposition. The value of residual stresses in a whole thin film coating as well as in its bismuth component was measured using X-ray diffraction technique. It was revealed that local compressive stresses, that had induced the whisker growth, had been formed by a segregation of Bi layers into Bi globules. A simple model of the whisker formation to minimize free energy in the Bi/Co system was proposed taking into account interfacial and elastic deformation energies. The obtained results can be utilized for growing of nanowires of other low-melting-point metals and semiconductors from immiscible composite thin films.
authors: National Technical University "Kharkiv Polytechnic Institute," Frunze Street 21, Kharkiv 61002, Ukraine.
authors: Valentine V
authors: VV
authors: Volobuev
authors: Piotr
authors: P
authors: Dziawa
authors: Alexander N
authors: AN
authors: Stetsenko
authors: Eugene N
authors: EN
authors: Zubarev
authors: Boris A
authors: BA
authors: Savitskiy
authors: Tatyana A
authors: TA
authors: Samburskaya
authors: Anna
authors: A
authors: Reszka
authors: Tomasz
authors: T
authors: Story
authors: Alexander Yu
authors: AY
authors: Sipatov
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008567:Membranes, Artificial; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D008567:Membranes, Artificial; D003035:Cobalt; D001729:Bismuth