120 research outputs found
Formation of carbon nitride compounds during successive implantations in copper
Copper substrates are successively implanted with carbon and nitrogen (C and N) at high fluences (5 × 10 and 1 × 10 at. cm, respectively) in order to synthesize specific carbon nitride compounds. The concentration as well as the depth distribution of carbon C and nitrogen N are determined using non resonant nuclear reactions induced by a 1.05 MeV deuteron beam. The use of (d,p) and (d,α) reactions allows us to profile both C and N elements with a single and relatively rapid measurement and a quite good resolution. The bonded states of carbon and nitrogen are studied as a function of depth by X-ray photoelectron spectroscopy (XPS). The curve fitting of the C 1s and N 1s photopeaks shows that carbon and nitrogen atoms exist in different chemical states depending on the analysis depth, which correspond to specific kinds of chemical bonds. At least two characteristic C-N bonds are detected indicating that different carbon nitride compounds have been formed during the implantations. © 2005 Elsevier B.V. All rights reserved
XPS fast depth profile of the native oxide layers on AISI 304, 316 and 430 commercial stainless steels and their evolution with time
Physique expérimentale - Exercices:A destination des étudiants Bac 1 en sciences médicales, biomédicales et vétérinaires.
Physique expérimentale - Exercices:A destination des étudiants Bac 1 en sciences médicales, biomédicales et vétérinaires.
RĂ©alisation d'une cellule de Knudsen pour l'Ă©tude et la croissance de l'indium sur Sb(111).
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