Abstract: We suggest a new technique to characterize the organic monolayers on silicon surfacesmeasurement of the differential capacity-electrode potential curve. By means of the investigation of differential capacity of a series of alkenes-modified silicon surfaces and H-Si(111)/electrolyte interfaces, we have established the relationship between the structure of the organic monolayers on silicon surfaces and their interface differential capacity. It has been confirmed to be a simple, quick, and effective experimental technique for the research of chemical modifications and functions on the silicon surfaces.

Key words: Monolayers on silicon surfaces, Differential capacity, Characteristic technique