Rapid Communications in Mass Spectrometry

Visualization of craters in a Langmuir–Blodgett film from the impact of 23 MeV C 60+ ions

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Atomic force microscopy (AFM) images taken from an Fe‐arachidate Langmuir‐Blodgett film irradiated with 23 MeV fullerene ions gives clear evidence that craters are formed as a result of the cluster‐ion impact. The crater diameter fits into a systematic formula already found for atomic ions. The AFM images indicate that even the largest molecular ions desorbed stem from the crater volume. Copyright © 1995 John Wiley & Sons, Ltd.