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The main improvement derives through the resonance among the incident radiation and also the Digital excitation wave about the metal area, called the area plasmon band [49]. Therefore, a confront roughness with a nanometer length scale is essential. Within the electrode area, these problems are obtained soon after in situ electro-deposition of AuNPs aggregates. The 3D AFM graphic with the pristine AuSPE substrate (Figure 4A) reveals a microscopic roughness, along with deep and micrometer-scale cavities. In distinction, a smoother and restructured surface is observed in Determine 4B. This electrochemical modification may change the dimensions cavities to the appealing nanometer selection and consequently market SERS phenomena.
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