| AVS 55th International Symposium & Exhibition | |
| Surface Science | Thursday Sessions |
| Session SS-ThP |
| Session: | Poster Session |
| Presenter: | K.A. Perrine, University of Delaware |
| Authors: | K.A. Perrine, University of Delaware T.R. Leftwich, University of Delaware C.R. Weiland, University of Delaware R.L. Opila, University of Delaware A.V. Teplyakov, University of Delaware |
| Correspondent: | Click to Email |
Reactions of nitrogen-containing bifunctional molecules with silicon substrates can play an important role in such areas of science and engineering as molecular electronics, surface passivation, and building organic/inorganic interfaces. These nitrogen-containing bifunctional molecules can be attached to the silicon surface via the nitro or nitroso group. The other end of the bifunctional molecule, a phenyl ring, remains intact after the reaction allowing for the model studies of electron transfer processes or for further surface modification. Nitrosoadducts are obtained from two different bifunctional molecules and two different surfaces. Nitrosobenzene reacts initially through a [2+2] cycloaddition on a clean Si(100)-2x1 surface through the N=O group leaving the phenyl ring intact. The oxygen migrates subsurface leaving the phenylnitrene adduct the dominant product from the reaction leaving the minor presence of the nitrosoadduct on the surface. However, nitrosoadducts are the dominant products from the condensation reaction of nitrobenzene with hydrogen-terminated Si(100). All these products and their distribution on surfaces are verified using X-ray photoelectron spectroscopy (XPS), infrared spectroscopic measurements (FTIR), and density functional theory (DFT) calculations. Analysis of the surface reaction pathways and spectroscopic investigations draw parallels between the nitrobenzene reaction on clean Si(100)-2x1 and hydrogen-terminated Si(100) and nitrosobenzene on clean Si(100)-2x1.