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Functional Group-Selective Adsorption Using Scanning Tunneling Microscopy.
MedLine Citation:
PMID:  22458813     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this study, we selectively enhanced two types of adsorption of 3-mercapto isobutyric acid on a Ge(100) surface by using the tunneling electrons from an STM and the catalytic effect of an STM tip, respectively. 3-Mercapto isobutyric acid has two functional groups: a carboxylic acid group at one end of the molecule, and a thiol group at the other end. It was found that the adsorption occurring through the carboxylic acid group was selectively enhanced by the application of electrons tunneling between an STM tip and the surface. Using this enhancement, it was possible to make thiol group-terminated surfaces at any desired location. In addition, via the use of a tungsten (W) STM tip coated with a tungsten oxide (WO3) layer, we selectively catalyzed the adsorption through the thiol group. Using this catalysis, it was possible to generate carboxylic acid group-terminated surfaces at any desired location. This functional group-selective adsorption using STM could be applied in positive lithographic methods to produce semiconductor substrates terminated by desired functional groups.
Authors:
Young Hwan Min; Eun Hee Park; Do Hwan Kim; Sehun Kim
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-29
Journal Detail:
Title:  ACS nano     Volume:  -     ISSN:  1936-086X     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101313589     Medline TA:  ACS Nano     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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