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. Author manuscript; available in PMC: 2010 May 5.
Published in final edited form as: Annu Rev Phys Chem. 2010 May 5;61:305–322. doi: 10.1146/annurev.physchem.040808.090249

Figure 4.

Figure 4

Molecular ion signal (M-H)− at m/z 146 representing a glutamate film on Si as a function of sputtering time using 3-keV Cn− projectile ions. Figure adapted from Reference 38, used by permission from the American Vacuum Society.