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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:58 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Physics and Technology of Alternative Renewable Energy Supplies
Title:
Investigating fractal graphene structures as supercapacitor building elements II
Authors:
Thanasis Tiliakos, Ioan Stamatin
Affiliation:
1Univeristy of Bucharest, Faculty of Physics, 3Nano-SAE Research Center, 405 Atomistilor str., Bucharest-Magurele, 077125.
E-mail
thanasis_tiliakos@hotmail.com
Keywords:
graphene oxide, supercapacitor, LightScribe, miniaturization.
Abstract:
LightScribe technology provides for a facile and inexpensive method for the scalable microfabrication of graphene-based supercapacitors for flexible on-chip energy storage devices. This technique essentially adjusts laser-etching so that it can be employed by simple DVD-burners on GO-coated disks: the laser traces the pattern provided by the LightScribe software to reduce the GO coating, thus inscribing a graphene pattern on the inert material. The process allows for miniaturizing the supercapacitors to the microscale, resulting in enhanced charge-storage capacity and rate capability. Expanding on this theme, we seek to imprint more complicated fractal structures that capitalize on the scaling parameter to account for vastly increased internal length over a finite surface: Peano and Hilbert curves are pseudo-fractals employing simple iterative algorithms that result in space-filling capabilities in 2D. The length-to-surface ratio of such curves increases with the number of iterations of the algorithm, directly affecting the capacitance of the imprinted element and thus possibly leading to a supercapacitor microstructure that can account for vastly increased charge storage capacity.
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