We report carbonization of polyacrylonitrile by direct laser writing to {produce|create|generate|make} microsupercapacitors {directly|straight} on-chip. We demonstrate the {process|procedure|method|approach|course of action} by {producing|creating|generating|making} interdigitated carbon finger electrodes {directly|straight} on a printed circuit board, which we then employ to characterize our supercapacitor electrodes. By varying the laser {power|energy}, {we are|we’re} {able to|in a position to} tune the {process|procedure|method|approach|course of action} from carbonization to material ablation. This {allows|enables|permits|makes it possible for} to {not only|not just|not merely|not simply} convert pristine polyacrylonitrile films into carbon electrodes, {but also|but additionally|but in addition} to pattern and {cut|reduce} away non-carbonized material to {produce|create|generate|make} {completely|totally|entirely|fully|absolutely} freestanding carbon electrodes. {While|Whilst|Although|Even though|When|Though} the carbon electrodes adhere {well|nicely|effectively|properly} {to the|towards the|for the} printed circuit board, non-carbonized polyacrylonitrile is peeled off the substrate. We {achieve|attain|accomplish|obtain|realize|reach} {specific|particular|certain|distinct|precise} capacities as {high|higher} as 260 µF/cm2 {in a|inside a|within a} supercapacitor with 16 fingers. Formula of 458532-84-8 tert-Butyl but-3-enoate site PMID:24580853
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