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VR-SFG spectra of an octadecane SAM on ITO prepared from octadecylphosphonic acid (ODPA/ITO), blue, and a film of C60-N on ITO (C60-N/ITO), red. Vibrational resonances are associated with the terminal methyl CH3 groups. Polarization is ppp, IR-Vis delay time is 2.0 ps.
