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A microscopic "fountain pen" Scientists in the Netherlands have used a micromachined "fountain pen" to write and etch sub-micron patterns on a surface with molecular "ink". The new device developed by Miko Elwenspoek and colleagues at the University of Twente is based on an atomic force microscope (S Deladi at al. 2004 Appl. Phys. Lett. 85 5361). Atomic force microscopes (AFMs) were originally designed to study surfaces but they are now routinely used for surface modification as well.
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