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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la201161q
|2 doi
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|a pubmed24n0703.xml
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|a (NLM)21863828
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|a DE-627
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|c DE-627
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|a eng
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|a Losego, Mark D
|e verfasserin
|4 aut
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|a Characterizing the molecular order of phosphonic acid self-assembled monolayers on indium tin oxide surfaces
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 26.01.2012
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|a Date Revised 15.11.2012
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2011 American Chemical Society
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|a Self-assembled monolayers (SAMs) of alkanephosphonic acids with chain lengths between 8 and 18 carbon units were formed on thin films of indium tin oxide (ITO) sputter-deposited on silicon substrates with 400 nm thermally grown SiO(2). The silicon substrates, while not intended for use in near-IR or visible optics applications, do provide smooth surfaces that permit systematic engineering of grain size and surface roughness as a function of the sputter pressure. Argon sputter pressures from 4 to 20 mTorr show systematic changes in surface morphology ranging from smooth, micrometer-sized grain structures to <50 nm grains with 3× higher surface roughness. Near-edge X-ray absorption fine structure (NEXAFS) spectroscopy experiments are conducted for alkanephosphonic acids deposited on these wide range of ITO surfaces to evaluate the effects of these morphological features on monolayer ordering. Results indicate that long-chain SAMs are more highly ordered, and have a smaller tilt angle, than short-chain SAMs. Surprisingly, the 1-octadecyl phosphonic acids maintain their order as the lateral grain dimensions of the ITO surface shrink to ∼50 nm. It is only when the ITO surface roughness becomes greater than the SAM chain length (∼15 Å) that SAMs are observed to become relatively disordered
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Membranes, Artificial
|2 NLM
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|a Organophosphonates
|2 NLM
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|a Tin Compounds
|2 NLM
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|a indium tin oxide
|2 NLM
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|a 71243-84-0
|2 NLM
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|a Guske, Joshua T
|e verfasserin
|4 aut
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|a Efremenko, Alina
|e verfasserin
|4 aut
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|a Maria, Jon-Paul
|e verfasserin
|4 aut
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| 700 |
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|a Franzen, Stefan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 19 vom: 04. Okt., Seite 11883-8
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:27
|g year:2011
|g number:19
|g day:04
|g month:10
|g pages:11883-8
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|u http://dx.doi.org/10.1021/la201161q
|3 Volltext
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