Abstract
The adsorbates formed by ultraviolet photo-assisted adsorption of allylamine (CH2=CHCH2-NH2) and allylalcohol (CH2=CHCH2- OH) on hydrogen-terminated Si(111) surfaces were examined by vibrational analysis using high-resolution electron energy loss spectroscopy (HREELS). The spectra exhibit the stretching signals for N-H and O-H, indicating the survival of functional groups -NH2 and -OH within the precursor molecules on the adsorbed layers. For the allylamine adsorbate, delivery of gaseous ketene (CH2=C=O) resulted in formation of amide (CH3CONH-) adsorbate. The allylamine adsorbate was evidently functional for peptide-bond formation. These monolayers are prospective materials for usage in nanometer-scale fabrication, chemical functionalization and biochemical analysis.
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