86,797 research outputs found
"Gestorben nicht ist dein Rom": eine formale Untersuchung zu den Rom-Essays Ingeborg Bachmanns
No full text"Gli epigrammi di Antonio Mancinelli" a cura di F. Lazzari e M. Lozzi: Introduzione di Maria Accame
No full textvol.I del Centro Studi "Antonio Mancinelli". ISBN 978-88-88617-27-5
Introduzione alla traduzione in italiano degli Epigrammi di Antonio Mancinelli eseguita sulla base dell'edizione del testo latino pubblicata da Giovanni Tacuino nel 1518
Ingeborg Bachmannn in aktueller Sicht: Perspektiven der Forschung
No full textIl libro offre in occasione del 90° compleanno della scrittrice, un panorama rappresentativo della ricerca internazionale su Ingeborg Bachmann
Soft X-ray photoemission spectroscopy study on the interaction between CuFPc molecules and Si(1 1 1)7×7 surface
No full textHigh resolution soft X-ray photoemission measurements have been performed onto ultra thin films of hexadecafluoro copper phthalocyanine deposited, at room temperature and in ultra high vacuum conditions, onto clean Si(111)7 x 7 substrate. The Si 2p spectra show the missing of the adatoms signal and the appearance of a broad feature mainly due to F-Si bonds. The Si 2p spectrum allows us to exclude the loss of copper atom from the molecule during the deposition. C Is spectrum evidences the presence of Si-C interaction, These results confirm previously published X-ray photoemission spectroscopy fluorine spectra, which clearly present the effects of the interaction of F atoms of the molecule with the silicon substrate and a strong modification of the C Is spectrum. (C) 2001 Elsevier Science B.V. All rights reserved
High resolution XPS studies on hexadecafluoro-copper-phthalocyanine deposited onto Si()7×7 surface
No full textHigh resolution X-ray photoelectron spectroscopy measurements have been performed onto ultrathin films of hexadecafluoro copper phthalocyanine deposited, at room temperature and in ultrahigh vacuum conditions, onto clean Si(1 1 1)7 x 7 substrate (silicon. Si). The measurements, performed at various film thicknesses, show a strong interaction between the molecule and the Si substrate. All the core level peaks present strong modifications induced by the substrate interaction. In particular the fluorine (F) spectrum clearly presents the effect of the interaction of some F atoms of the molecule with the substrate, which determines the formation of F-Si bonds while the copper spectrum indicates a charge transfer from the Si substrate. The changes observed in the other core level spectra have been attributed to a different charge distribution in the molecule. after the formation of F-Si bonds. We suggest a planar growth of these molecules on the Si substrate starting from the first layer. (C) 2001 Elsevier Science B.V. All rights reserved
Ingeborg Bachmanns italienische Korrespondenz. Vorbemerkungen zu einem Editionsprojekt
No full textL'articolo presenta il progetto di un'edizione della corrispondenza di Ingeborg Bachmann con autori ed editori italiani
Aligned carbon nanotube thin films for DNA electrochemical sensing
No full textCarbon nanotubes are interesting materials for DNA electrochemical sensing due to their unique electric
properties: high surface area, fast heterogeneous electron transfer, and electrochemical stability. In this
work aligned Carbon NanoTube (CNT) thin films were designed and tested as candidate platforms for
DNA immobilization and for the development of an electrochemical genosensor.
The filmswere prepared by Chemical Vapor Deposition (CVD) using acetylene and ammonia as precursor
gases and nickel particles as catalyst. A preliminary electrochemical characterization was performed
using cyclic voltammetry since, so far, these films have been used only for gas sensing. The surfaces were
then covalently functionalized with a DNA oligonucleotide probe, complementary to the sequence of
the most common inserts in the GMOs: the Promoter 35S. The genosensor format involved the immobilization
of the probe onto the sensor surface, the hybridization with the target-sequence and the
electrochemical detection of the duplex formation. Careful attention was paid to the probe immobilization
conditions in order to minimize the signal due to non-specifically adsorbed sequences. For the
detection of the hybridization event both label-free and enzyme-labelled methods were investigated. In
case of the enzyme-labelled method a target concentration at nanomolar level can be easily detected,
with a linear response from 50nM to 200 nM, whereas the label-free method showed a linear response
between 0.5Mand 10M. The reproducibility was 11% and 20% with the enzyme-labelledmethod and
the label-free method, respectively. The batch-to-batch reproducibility of the different sensors was also
evaluated
Effect of thermal treatment on morphology and electrical transport properties of carbon nanotubes film
No full textCarbon nanotubes have been synthesised with high density on a large area of platinum pre patterned layer of silicon nitride solid substrate by means of chemical vapour deposition of acetylene at 500 C in ammonia ambient. The effect of the microwave induced thermal annealing, in atmospheric air, on the morphology and electrical transport properties of nanotubes films has been evaluated. At increasing annealing time the thermal treatments leads to a progressive reduction of the nanotubes' mean diameter and to a dramatic change in the electrical conductivity of the film. Such modifications have been directly attributed to a strong reduction of the amorphous carbon amount as a consequence of the thermal annealing by microwave
Copper hexadecafluoro phthalocyanine and naphthalocyanine: The role of shake up excitations in the interpretation and electronic distinction of high-resolution X-ray photoelectron spectroscopy measurements
No full textWe present the first high-resolution X-ray photoelectron core level spectra of bulk copper hexadecafluoro phthalocyanine (CuFPC) and naphthalocyanine (H2NPC). The measurements have been performed in UHV onto samples grown in situ. A shake-up satellite assigned to a monopole on-site HOMO-LUMO molecular excitation has been evidenced in the F, C and N core-level spectra measured. In the case of the CuFPC, the shake-up is characteristic of the F atoms, of the four N atoms that are Cu bonded, and of the F- and N-bonded C atoms. The shake-up to main peak relative binding energy has been estimated to be 1.6 eV. In the case of H2NPC, the outer benzenic C atoms do not show a satellite excitation, which instead is characteristic of the C and N atoms belonging to the inner porphyrin-like central ring of the molecule. The shake-up is less than 1 eV at higher binding energies from the main core line. The localisation of the HOMO level in the central structure of the molecule is confirmed by Hartree-Fock all-electron molecular orbital calculations performed on the metal-free phthalocyanine (H2PC) and hexadecafluoro phthalocyanine (H2FPC) molecules. (C) 1999 Elsevier Science B.V. All rights reserved
La meningo-encefalite da virus di Epstein-Barr: considerazioni su una rarissima manifestazione clinica nel soggetto adulto.
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