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We fabricated nanoporous gold (NPG) on a microelectrode by oxidization and reduction cycles (ORCs) in acidic media. The typical morphology of the nanostructures comprised tangled thickets of branched nanowires with diameters of 20–30nm. Furthermore, the surface area was significantly increased compared with the bare electrode. The roughness factor (Rf) of NPG could be controlled by changing the number...
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