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DVD writer used to create one-atom thick battery.

Using an off the shelf, consumer grade DVD burner, researchers at UCLA have been able to print micro-scale graphene-based supercapacitors - devices that can charge and discharge a hundred to a thousand times faster than standard batteries. These micro-supercapacitors, made from a one-atom–thick layer of graphitic carbon, can be easily manufactured and readily integrated into small devices such as next-generation pacemakers.

"The process is straightforward, cost-effective and can be done at home," says one of the researchers. "One only needs a DVD burner and graphite oxide dispersion in water, which is commercially available at a moderate cost."
 
The new micro-supercapacitors are also highly bendable and twistable, making them potentially useful as energy-storage devices in flexible electronics like roll-up displays and TVs, e-paper, and even wearable electronics.
To create the supercapacitors, the team glued a layer of plastic onto the surface of a DVD and then coated the plastic with a layer of graphite oxide.
They then used a Lightscribe optical drive, which is normally used to label as well as write DVD’s, to produce an interwoven pattern on the graphite so precise that none of the “interwoven fingers” touch each other, which would short-circuit the supercapacitor.
When the graphite oxide absorbs laser light it is converted into graphene, which can then be peeled away from the DVD.

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