Abstract

Ion mobility measurements can be used to separate structural isomers of atomic clusters and to provide information about their geometries and isomerization processes. The principles behind ion mobility measurements and the methods used to calculate mobilities for comparison with the experimental data are briefly reviewed. With the development of high resolution ion mobility measurements, it is now possible to separate many more structural isomers than could be resolved using conventional techniques. Some recent results for carbon and silicon clusters are described. For sodium chloride nanocrystals several families of structural isomers have been resolved and the results show that dramatic shape transformations can occur at room temperature for these species.

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