Large-scale, uniform, vertically standing graphene film with atomically thin edges (shown in the magnifying glass in the back cover image) is controllably synthesized using methane in a microwave-plasma chemical vapor deposition system. This film shows excellent field-emission properties, as demonstrated by Hong-Jun Gao, Yunqi Liu, and co-workers on page 250. In the lower part of the image, a plane emitter based on this vertically standing graphene film is demonstrated. The small blue spheres between the two plates represent the emitted electrons.
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