Gap-mode SERS studies of azobenzene-containing self-assembled monolayers on Au(111)
| Autor: | Katsuyoshi Ikeda, Claudia Bornholdt, Olaf M. Magnussen, Kohei Uosaki, Ulrich Jung, Dordaneh Zargarani, Rainer Herges, Mathias Müller, Felix Tuczek, Norihiro Fujimoto, Ursula Cornelissen |
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| Rok vydání: | 2010 |
| Předmět: |
Analytical chemistry
Nanoparticle Self-assembled monolayer Surface-enhanced Raman spectroscopy Photochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound symbols.namesake Colloid and Surface Chemistry Azobenzene chemistry Monolayer symbols Molecule Self-assembly Raman spectroscopy |
| Zdroj: | Journal of Colloid and Interface Science. 341:366-375 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2009.09.040 |
| Popis: | Self-assembled monolayers of azobenzene-containing thiols on smooth Au(1 1 1) surfaces were studied by gap-mode surface-enhanced Raman spectroscopy (gap-mode SERS). By adsorption of colloidal Au nanoparticles on top of the organic adlayer highly reproducible spectra with strongly enhanced intensities are obtained. The observed bands indicate a trans conformation of the azobenzene moieties and are in agreement with structural data for the molecular layer. A characteristic dependency on the terminal and the spacer groups of the molecules is found. Samples prepared during illumination with UV light show pronounced spectral differences that can be attributed to azobenzene in cis conformation. |
| Databáze: | OpenAIRE |
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