Bending potential as an important factor for the structure of monomolecular thiolate layers on GaAs substrates
The presence of a substrate-dependent binding geometry at the anchoring group and its energetics (bending potential) are known to be important in determining the lateral density and structure of self-assembled monolayers (SAMs) of thiolates and selenolates on coinage metal substrates. Here we show t...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
June 21, 2013
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| In: |
The journal of physical chemistry letters
Year: 2013, Volume: 4, Issue: 13, Pages: 2217-2222 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/jz401091y |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/jz401091y
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| Author Notes: | Hao Lu, Andreas Terfort, and Michael Zharnikov |
| Summary: | The presence of a substrate-dependent binding geometry at the anchoring group and its energetics (bending potential) are known to be important in determining the lateral density and structure of self-assembled monolayers (SAMs) of thiolates and selenolates on coinage metal substrates. Here we show that on the technologically important GaAs(001) surface a bending potential exists for thiolate adlayers as well. For this, we used a series of terphenyl-substituted alkanethiols, C6H5(C6H4)2(CH2)nSH (TPn, n = 0-6), as a suitable model system. The bending potential plays a dominant role in the balance of the structure-building interactions in the TPn SAMs on GaAs, resulting in a persistent, “odd-even” variation of molecular orientation and packing density in these monolayers as a function of the parity of n. This observation should necessarily be considered for the design of future, functional SAMs on GaAs(001). |
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| Item Description: | Gesehen am 08.06.2021 |
| Physical Description: | Online Resource |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/jz401091y |