Angewandte Chemie International Edition

Cover image for Vol. 53 Issue 17

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, Zeitschrift für Chemie

51_20b/2012Back Cover: Material Transfer and Polarity Reversal in Contact Charging (Angew. Chem. Int. Ed. 20/2012)

Alessandro Volta (portrait by N. Cianfanelli) was the first modern scientist who aimed to rank dielectric materials. No such rankings have proven accurate because of the effects of material transfer, as described by B. A. Grzybowski and co-workers in their Communication on page 4843 ff. In the picture, the upper half of the circle illustrates a typical ranking of contact charging (red=positive polarity, blue=negative polarity). The lower half shows atomic force microscopy images of contact-charged surfaces.

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