Probing the orientation of electrostatically immobilized cytochrome C by time of flight secondary ion mass spectrometry and sum frequency generation spectroscopy

Biointerphases

Journal for Biophysical Chemistry

Table 1 Secondary ion fragments used in the ToF-SIMS analysis

None of the four secondary ions listed above are present in spectra taken from the NH₂- and COOH-SAMs prior to CytoC immobilization.