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- Giovanelli, L., et al.
(författare)
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Electronic structure of self-assembled organic/inorganic semiconductor interfaces : lead phthalocyanine on InSb and InAs(100)-4X2/c(8 X2)
- 2001
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Ingår i: Journal of Electron Spectroscopy and Related Phenomena. - 0368-2048 .- 1873-2526. ; 114, s. 375-381
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Tidskriftsartikel (refereegranskat)abstract
- The interfacial properties of ultra thin films of lead-phthalocyanine deposited in situ onto InSb and InAs(100)-4X2/c(8X2) clean surfaces have been studied by synchrotron radiation core level and valence band photoelectron spectroscopy. The interaction between the overlayers and the substrates was determined upon analyzing the changes in the photoemission spectra between room and higher annealing temperatures, leading to ordered monolayer films. While weaker than on other substrates, a reactivity is nevertheless present: the organic macrocycle preserves its integrity up to 320 degreesC but the Pb central atom first leaves the molecules most probably to be incorporated in the substrate surface, before being desorbed at higher temperatures.
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- Honour, JW, et al.
(författare)
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Procedure for neonatal screening for congenital adrenal hyperplasia due to 21-hydroxylase deficiency
- 2001
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Ingår i: Hormone research. - : S. Karger AG. - 0301-0163. ; 55:4, s. 201-205
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Tidskriftsartikel (refereegranskat)abstract
- The value of screening of neonates for congenital adrenal hyperplasia is not universally accepted. Procedures for screening are recommended here in order to provide a structure to the testing and ultimately bring together data that will allow the effect of screening to be judged for benefit or dismissed as no better than clinical recognition of the disease state.
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- Papageorgiou, N., et al.
(författare)
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High resolution synchrotron radiation PES study of PbPc deposited on Pt(111)
- 2000
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Ingår i: Applied Surface Science. - 0169-4332 .- 1873-5584. ; 162, s. 178-183
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Tidskriftsartikel (refereegranskat)abstract
- We studied lead phthalocyanine (PbPc) films sublimated under UHV conditions on a clean Pt(111) substrate. We report results from high resolution photoelectron spectra of the Pb 5d, Ph 4f, C 1s, N 1s and Pt 4f core level using synchrotron radiation. Comparison between ultra thin films and thicker films shows that the first molecular adlayer interacts strongly with the substrate and we report evidence of Pb-Pt alloy formation on the surface. For the thick films, the C Is and N Is core level spectra show usual characteristics, however in the case of ultra thin films, we note important differences with respect to some previous results.
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| 7. |
- Giovanelli, L., et al.
(författare)
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Synchrotron radiation photoelectron spectroscopy study of Pb-Pc thin films on InSb(100)-(4x2)/c(8x2)
- 2001
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Ingår i: Surface Science. - 0039-6028 .- 1879-2758. ; 486:02-jan, s. 55-64
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Tidskriftsartikel (refereegranskat)abstract
- The electronic properties and the thermal stability of a thin film of lead-phthalocyanine deposited on the InSb(100)-(4 x 2)/c(8 x 2) surface were studied by synchrotron radiation core level and valence band photoelectron spectroscopy. The interaction between the overlayer and the substrate was determined by analyzing the photoemission spectra of a thin film and of a single monolayer of adsorbed molecules. Subsequently the monolayer was annealed at increasing temperatures, leading first to a gradual change of the oxidation state of the central lead atom, then to a fragmentation of the macrocycle itself.
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| 8. |
- Papageorgiou, N., et al.
(författare)
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Lead phthalocyanine thin films on InAs(100)-(4 x 2)/c(8 x 2) studied by synchrotron radiation photoelectron spectroscopy
- 2001
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Ingår i: Surface Science. - 0039-6028 .- 1879-2758. ; 482, s. 1199-1204
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Tidskriftsartikel (refereegranskat)abstract
- We used synchrotron radiation photoelectron spectroscopy to study the interface between a thin film and an ordered single monolayer of lead phthalocyanine (PbPc) deposited on the clean InAs(1 0 0)-(4 x 2)/c(8 x 2) reconstructed surface. Analysis of the core level and valence band spectra gave information about the electronic properties of the interface, the interaction between the molecule and the substrate and the valence band offset of the heterojunction.
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- Rampazzo, Roberto, et al.
(författare)
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Extragalactic Astronomy : From Pioneers to Big Science
- 2016
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Ingår i: From the Realm of the Nebulae to Populations of Galaxies. - Cham : Springer. - 9783319310046 - 9783319310060 ; , s. 1-92
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Bokkapitel (refereegranskat)abstract
- At the beginning of the nineteenth century one of the scientific issues driving the research of astronomers, like the Herschels, was to test if all the nebulæ can be resolved into stars.
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