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|a (DE-627)NLM149328176
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|a (NLM)15248732
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Frehill, F
|e verfasserin
|4 aut
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|a Iron wheels on silicon
|b wetting behavior and electronic structure of adsorbed organostannoxane clusters
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|c 2004
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|2 rdacarrier
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|a Date Completed 07.06.2006
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|a Date Revised 13.07.2004
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Copyright 2004 American Chemical Society
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|a Atomic force microscopy and synchrotron radiation (SR) spectroscopy have been used to study the wetting behavior and electronic structure of thin films of a novel organometallic cluster--[BuSn(O)OC(O)Fc]6 ("Fc" = ferrocenyl)--on silicon substrates. This cluster comprises six ferrocene units connected to a stannoxane central core--"an iron wheel on a tin drum" (V. Chandrasekhar; et al. Angew. Chem., Int. Ed. 2000, 39, 1833). Thin films spin-cast onto native oxide-terminated silicon readily dewet the substrate. We have utilized advanced image analysis techniques based on Minkowski functionals to provide a detailed quantitative analysis of the morphology of the stannoxane overlayers. This analysis shows that the dewetting patterns are rather far removed from those expected to arise from a simple Poisson distribution of centers, and we discuss the implications of this finding in terms of nucleated and spinodal dewetting. Variations in both the surface roughness and the in-plane correlation length have been followed as a function of annealing time to probe the surface dewetting dynamics. SR valence band photoemission illustrates that the highest occupied molecular orbital (HOMO) of the cluster is found 2 eV below the Fermi level. Fe 2p --> 3d and Sn 3d --> 5p resonant photoemission spectroscopy have been used to enhance the cross sections of the partial density of states associated with the Fe and Sn atoms. Sn atoms make a large contribution to the HOMO of the cluster, whereas the Fe atoms are associated with an electronic environment seemingly very similar to that in the "parent" ferrocene molecule
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|a Journal Article
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|a Schulte, K H G
|e verfasserin
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|a Martin, C P
|e verfasserin
|4 aut
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|a Wang, L
|e verfasserin
|4 aut
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|a Patel, S
|e verfasserin
|4 aut
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|a Purton, J A
|e verfasserin
|4 aut
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|a Vos, J G
|e verfasserin
|4 aut
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|a Moriarty, P
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 20(2004), 15 vom: 20. Juli, Seite 6421-9
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:20
|g year:2004
|g number:15
|g day:20
|g month:07
|g pages:6421-9
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