Document Detail


In situ study of the deposition of (ultra)thin organic phosphonic acid layers on the oxide of aluminium.
MedLine Citation:
PMID:  22242677     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The interest in self-assembling monolayer deposition on various oxide substrate surfaces is steeply increasing in the last decades. Although many studies are being performed, literature exhibits a lot of discrepancies regarding analysis and data interpretation. Also for the deposition of phosphonic acids on aluminium oxides, there is no global consensus. In this paper, we present an original in situ analysis in order to eludicate the real layer formation mechanism. First of all, the state of the phosphonic acid molecules was determined using DOSY-NMR, making sure that no structures other than free molecules were present at the concentration used. With in situ atomic force microscopy and in situ visual ellipsometry, multilayers of phosphonic acids were determined. The growth of the layers was identified as being a Stranski Krastanov one. This closely corresponds with the behaviour of the octylphosphonic acid films analysed by ex situ techniques. These results are in contrast with most of the literature, where self-assembly of phosphonic acids on oxides is commonly accepted.
Authors:
Tom Hauffman; Luk Van Lokeren; Rudolph Willem; Annick Hubin; Herman Terryn
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-13
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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