1,721,139 research outputs found
Il « seggio periglioso » di Gaston Paris : echi della polemica Bédier-Rajna nel carteggio Novati-Rajna
No full textBrambilla Alberto. Il « seggio periglioso » di Gaston Paris : echi della polemica Bédier-Rajna nel carteggio Novati-Rajna. In: Romania, tome 107 n°428, 1986. pp. 520-536
Chemical and Magnetic Properties of NiO Thin Films Epitaxially Grown on Fe(001)
No full textVery high quality NiO films have been grown on Fe(001) by means of Molecular Beam Epitaxy. The chemical and magnetic properties of the NiO/Fe(001) interface have been evaluated by means of X-ray Absorption Spectroscopy and X-ray Magnetic Circular Dichroism. Furthermore, combined use of X-ray Magnetic Linear Dichroism and PhotoElectron Emission Microscopy allowed to observe an in-plane uniaxial magnetic anisotropy in very thin NiO films. For NiO films thinner than about 9 atomic layers the NiO magnetic moments align in-plane perpendicular to the Fe substrate magnetization. Above such critical thickness the coupling turns out to be collinear. The effects of thermal treatments, fundamental to produce exchange-biased structures, have also been considered
Atomic-Scale Insights into Metal-Oxide/Graphene Heterostructures
Full text linkHeterostructures consisting of graphene (Gr) and metal-oxides are gaining increasing attention due to their exceptional structural, electronic, and chemical properties. Understanding the characteristics of the Gr/metal-oxide interface is crucial for designing advanced materials with tailored properties for a wide range of technological applications. Gr is often employed as a substrate for the stabilization of metal-oxides nanoclusters, enhancing their performance in heterogeneous catalysis. Conversely, the integration of atomically flat, ultra-thin metal-oxides with Gr enables precise modulation of its electronic properties, thereby unlocking novel possibilities for advancements in nano-electronics. This review explores the atomic-scale details of interfaces formed between Gr and metal-oxide films, analysed from a surface science perspective. Special attention is directed toward the role of Gr in shaping the morphology of metal-oxides, as well as in addressing the challenges of stabilizing a Gr layer on an oxide surface. The electronic coupling between Gr and metal oxides is examined, with a focus on the implications for both catalytic and electronic applications of these heterostructures
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Growth of stoichiometric TiO2 thin films on Au(100) substrates by molecular beam epitaxy
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Photon and electron induced surface band bending in electron spectroscopies on ZnSe(001)
No full textThe surface band bending in ZnSe(0 0 1), as a function of the temperature, is investigated both in the valence band (by photoemission) and in the conduction band (by inverse photoemission and absorbed current spectroscopies). Two different mechanisms are invoked for interpreting the experimental data: the band bending due to surface states, and the surface voltage induced by the incident beam. While the latter is well known in photoemission (surface photovoltage), we demonstrate the existence of a similar effect in inverse photoemission and absorbed current spectroscopies, induced by the incident electrons instead of photons. These results point to the importance of considering the surface voltage effect even in electron-in techniques for a correct evaluation of the band bending
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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