Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5425612 | Surface Science | 2007 | 5 Pages |
Infrared vibrational spectroscopy in an attenuated total reflection (ATR) geometry has been employed to investigate the presence of organic thin layers on Si-wafer surfaces. The phenomena have been simulated to show there can be a field enhancement with the presented single-reflection ATR (SR-ATR) approach which is substantially larger than for conventional ATR or specular reflection. In SR-ATR, a discontinuity of the field normal to the film contributes a field enhancement in the lower index thin film causing a two order of magnitude increase in sensitivity. SR-ATR was employed to characterize a single monolayer of undecylenic acid self-assembled on Si(1Â 1Â 1) and to investigate a two monolayer system obtained by adding a monolayer of bovine serum albumin protein.