Systems, methods, and apparatus are disclosed for wirelessly charging an electric vehicle. A slurry coating material is prepared from a mixture of a silicon alkyd paint and suspended particles of an aluminum or aluminum alloy powder. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber that possibly cause environmental pollution. The sample buffer control unit controls writing and reading operations. The methods and compositions of the invention are advantageously utilized to decontaminate andor sterilize various articles such as medical and manufacturing devices or surfaces.