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SERS intensity changes in the MB deposited onto (a) 3D stacked Ag NWs structures and (b) 3D hybrid (0.002 wt% TiO2/Ag NWs) nanostructures during 638 nm laser exposure (10 s). The SERS measurements were performed by illuminating with a 638 nm laser for only 0.01 s to avoid photocatalytic effects. (c) The overall SERS intensity changes at 1620 cm−1 in MB molecules under different illumination conditions.
