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Optical and electronic properties of TiCxNy films (2001)

Fuentes, G. G. ; Elizalde, E. ; Sanz, J. M.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 90 (2001), S. 2737-2743

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The optical and electronic properties of TiCxNy(x+y∼1,0〈y〈1) thin films have been investigated by spectroscopic ellipsometry in the 1.5–4.5 eV energy range and by valence band x-ray photoemission spectroscopy as a function of the composition. The dielectric functions measured in the energy range of intraband transitions are analyzed in terms of a Drude-like approximation. Both the free plasma energy and the damping constant are observed to depend on the nitrogen content of the samples, suggesting a certain tunability of the optical and electronic properties of these films. Analysis of the valence band reveals that the C 2p band shifts toward higher binding energies upon an increase of the nitrogen content, in good agreement with the shift observed in the minimum of the optical reflectivity associated with the threshold of the interband transitions. The enhancement of the metallic character of the films as the nitrogen content increases is also evidenced by x-ray photoemission spectroscopy as a continuous intensity growth of the conduction band at the Fermi level. © 2001 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1394157

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New SSR markers of Phaseolus vulgaris from sequence databases (2004)

Guerra-Sanz, J. M.

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 123 (2004), S. 0

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ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: To enlarge the number of microsatellite loci of Phaseolus vulgaris (L.) (common bean), a set of primer pairs has been obtained from public databases, to amplify DNA regions including simple sequence repeats (SSR), and they have been assayed in several P. vulgaris genotypes. Publically available DNA sequence data of P. vulgaris were searched for SSR motifs. Twenty sequences containing microsatellites were identified and primer pairs were designed to amplify those microsatellites. Primers were evaluated for their ability to detect polymorphisms within a set of P. vulgaris accessions, local landraces and hybrids and in addition, two accessions of the closely related species P. coccineus. Eighteen polymorphic SSR loci were identified. Polymorphisms were found at both levels of accessions and Phaseolus species.