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Published online by Cambridge University Press: 17 March 2011
Substitution reactions of surface hydrogen in amorphous silicon at room temperature have been studied. After wet treatment of hydrogenated amorphous silicon thin films with Grignard reagent, surface hydrogen atoms have been substituted by organic groups. Wet treatment of amorphous silicon thin films in CH3(CH2)9-MgBr ether solution followed by quenching by diluted HCl changes infrared absorption spectra. After the treatment, new three peaks of C–H have been observed. In addition, the peaks did not disappeared after rising by hydrofluoric acid or various kinds of organic solvent. The spectra indicate that the Grignard reagent is enough reactive to form new covariant bonding of C and Si at the amorphous silicon surface by substitution reaction.