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Sum frequency generation from Langmuir-Blodgett multilayer films on metal and dielectric substrates.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Holman, Jasper Davies, Paul B. Nishida, Takuma Ye, Shen Neivandt, David J. |
| Copyright Year | 2005 |
| Abstract | Sum frequency generation (SFG) vibrational spectra of cadmium arachidate multilayer films adsorbed on a substrate with high nonresonant susceptibility, i.e., gold, and on a low nonresonant susceptibility substrate, i.e., fused quartz, have been investigated in the C-H stretching region in air. The films were formed by Langmuir-Blodgett (LB) deposition and their spectra recorded using SFG spectrometers employing both 532-nm nanosecond and 800-nm femtosecond lasers, with counter-propagating and co-propagating beam geometries, respectively. Both kinds of substrate were rendered hydrophobic by coating them with per-deuterated octadecanethiol (gold) or per-deuterated cadmium arachidate (fused quartz) monolayers. Single per-protonated arachidate layers in otherwise per-deuterated 10-layer films were used to show that the SFG resonances arise only from the topmost and lowermost layers in a LB film comprised of an even number of per-protonated layers, although the SFG spectra from the two hydrophobic substrates are different from each other. The differences in the spectra from the same ten-layer per-protonated films deposited on the two types of hydrophobic substrate have been explained in terms of a simple model that accounts for resonant and nonresonant contributions. |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/jp051564y |
| PubMed reference number | 16853409 |
| Journal | Medline |
| Volume Number | 109 |
| Issue Number | 40 |
| Alternate Webpage(s) | http://forestbioproducts.umaine.edu/files/2010/10/neivandt.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/jp051564y |
| Journal | The journal of physical chemistry. B |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
