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Deep levels subsisting in ion implanted silicon after various transient thermal annealing procedures (1983)

Mesli, A. ; Muller, J. C. ; Siffert, P.

Springer

Applied physics 31 (1983), S. 147-152

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ISSN: 1432-0630

Keywords: 61.80 ; 85.30 ; 71.20

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: Abstract Deep-level transient spectroscopy has been used to investigate the defects remaining in ion implantedp-n junctions in silicon after various pulsed annealing techniques, including ruby and YAG lasers as well as pulsed electron beams (PEBA). The nature and distribution of the various identified levels are discussed for each procedure as a function of various experimental parameters.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00624720

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Etude par Spectroscopie et Microscopie Raman de Phases Oxyde de Molybdène Déposé sur Alumines (1980)

Sombret, B. ; Dhamelincourt, P. ; Wallart, F. ; [et al.]

Chichester [u.a.] : Wiley-Blackwell

Journal of Raman Spectroscopy 9 (1980), S. 291-296

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ISSN: 0377-0486

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: Raman spectroscopy and microscopy have been used to study some catalysts: Mo supported on alumina. Different Mo species were found, depending upon the amount of molybdenum deposited on the carrier. At low coverages (4% wt MoO3) distorted molybdate tetrahedra were observed. Increasing the surface coverage resulted in the formation of a polymolybdate phase with octahedrally surrounded molybdenum. Additionally, ‘bulk MoO3’ appeared when amounts were above 16% wt MoO3. When the supports were washed during their preparation with aqueous NH4OH and HNO3 solutions, preferential formation of polymolybdate phase was observed. In case of washing with alkaline solution ‘free MoO3’ was also detected. Finally using the Raman microprobe MOLE, a map giving the distribution of the different species at the surface of support was obtained.

Additional Material: 7 Ill.