A photographic camera flash can instantaneously triggers the de-oxygenation reaction of graphite oxide by photothermal heating. The product is conducting, graphene-like material as shown in the video. Using a photo-mask, conducting patterns can be readily created such as the logos of Northwestern Wildcat and NSF.
To learn more about this research, visit: http://jxhuang.mccormick.northwestern.edu/
or
http://pubs.acs.org/doi/abs/10.1021/ja902348k?journalCode=jacsat
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