Lin, JianPeng, ZhiweiLiu, YuanyueRuiz-Zepeda, FranciscoYe, RuquanSamuel, Errol L.G.Yacaman, Miguel JoseYakobson, Boris I.Tour, James M.2016-06-272016-06-272014Lin, Jian, Peng, Zhiwei, Liu, Yuanyue, et al.. "Laser-induced porous graphene films from commercial polymers." <i>Nature Communications,</i> 5, (2014) Nature Publishing Group: http://dx.doi.org/10.1038/ncomms6714.https://hdl.handle.net/1911/90573The cost effective synthesis and patterning of carbon nanomaterials is a challenge in electronic and energy storage devices. Here we report a one-step, scalable approach for producing and patterning porous graphene films with three-dimensional networks from commercial polymer films using a CO2 infrared laser. The sp3-carbon atoms are photothermally converted to sp2-carbon atoms by pulsed laser irradiation. The resulting laser-induced graphene (LIG) exhibits high electrical conductivity. The LIG can be readily patterned to interdigitated electrodes for in-plane microsupercapacitors with specific capacitances of >4 mF cm-2 and power densities of ~9 mW cm-2. Theoretical calculations partially suggest that enhanced capacitance may result from LIG's unusual ultra-polycrystalline lattice of pentagon-heptagon structures. Combined with the advantage of one-step processing of LIG in air from commercial polymer sheets, which would allow the employment of a roll-to-roll manufacturing process, this technique provides a rapid route to polymer-written electronic and energy storage devices.engThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the Nature Publishing Group.Journal articlehttp://dx.doi.org/10.1038/ncomms6714