Fig. 4. Analyzing homolytic cleavage for identifying the position of bond cleavage by contact electrification along the alkylsilane functionalized on the surface.
a Reaction scheme of homolytic cleavage of alkylsilane that generates alkyl radicals. Self-reaction of alkyl radicals with n number of carbon atoms produces an alkane with 2n number of carbon atoms. b ToF-SIMS spectra of the alkanes with 2n number of carbon atoms (C2nH4n+2) on the uncoated surfaces before (yellow) and after (red) contact electrification with the alkylsilane-coated surfaces of different n. c Comparing the ToF-SIMS intensities of the peaks of the alkanes with the 2n number of carbon atoms (C2nH4n+2) and the peaks of the alkanes with the 2(n − 1) number of carbon atoms (C2n−2H4n−2) on the uncoated surfaces after contact electrification. Source data are provided as a Source Data file.