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The one-step electrochemical fabrication of 3D-nano-porous gold films (NPGFs) was optimised to function as a Surface Enhanced Raman Spectroscopy (SERS) substrate at 785nm by a central composite experimental design. The concentration of the acid electrolyte (HCl), the potential step time, and the interaction between the acid concentration and the step time all had significant influence on the SERS...
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