Differential Mobility Analysis of C60 Negative Ion in He, Ne, and Ar
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An anomalous behavior was found in the electrical mobilities of C60 negative ions in He, Ne, and Ar gas measured using a differential mobility analyzer (DMA). The measured inverse mobilities were larger than those calculated with a hard-sphere collision model. We suggested that this anomalous behavior could be ascribed to the potential force of interactions between the C60 negative ion and the gas molecule. Additionally, a method of ab initio calculation of potential energies between the C60 negative ion and the sheath gas molecule was developed, to quantitatively understand the anomalous behavior.
- Jpn J Appl Phys
Jpn J Appl Phys 45(9A), 7243-7245, 2006-09-15
INSTITUTE OF PURE AND APPLIED PHYSICS