Sökning: onr:"swepub:oai:DiVA.org:liu-77052" >
Spectroscopic Chara...
Spectroscopic Characterization and Modeling of Methyl- and Hydrogen-Terminated Oligo (ethylene glycol) Self-Assembled Monolayers
-
- Malysheva, Lyuba (författare)
- Bogolyubov Institute for Theoretical Physics, 03680, Kiev, Ukraine
-
- Onipko, Alexander (författare)
- Bogolyubov Institute for Theoretical Physics, 03680, Kiev, Ukraine
-
- Fyrner, Timmy (författare)
- Linköpings universitet,Kemi,Tekniska fakulteten
-
visa fler...
-
- Lee, Hung-Hsun (författare)
- Linköpings universitet,Molekylär fysik,Tekniska fakulteten
-
- Valiokas, Ramūnas (författare)
- Department of Nanoengineering, Center for Physical Sciences and Engineering, Savanoriu 231, LT-02300 Vilnius, Lithuania
-
- Konradsson, Peter (författare)
- Linköpings universitet,Organisk Kemi,Tekniska högskolan
-
- Liedberg, Bo (författare)
- Linköpings universitet,Sensorvetenskap och Molekylfysik,Tekniska högskolan
-
visa färre...
-
(creator_code:org_t)
- 2012-05-23
- 2012
- Engelska.
-
Ingår i: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 116:22, s. 12008-12016
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Two series of oligo (ethylene glycol) (OEG) thiol compounds HS-(CH2CH2O)nR with R = CH3, H and n = 5, 6, 7, have been synthesized and used to form self-assembled monolayers (SAMs) on gold. The data from null ellipsometry, infrared reflection-absorption spectroscopy and ab initio calculations of this type of OH- and CH3-terminated OEG SAMs are used to examine the rarely addressed in-SAM orientation of oligo (ethylene glycols) and to provide detailed assignments of infrared bands in the fingerprint and CH-stretching regions. Based on these results, a new spectral band has been observed at 2947 cm-1 and identified by the firstprinciple calculations as localized vibrations that are specific for hydrogen-terminated OEG thiolate SAMs. This band can be used as an indicator of a high crystalline like ordering. It is further more stressed that theory agrees with the experimentally obtained CH-stretching spectra remarkably well if, and only if, the OEG helix axis within studied SAMs is tilted by about 20o with respect to the surface normal.
Nyckelord
- Oligo(ethylene glycol) self-assembled monolayers
- infrared reflection absorption spectroscopy
- first-principle calculations
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas