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Figure 5: Typical SERS spectra of 1D AuNPs lines and 2D AuNPs lattices. (a) 5 nm- (black), 10 nm- (red), 20 nm- (blue), 30 nm- (purple), 50 nm- (green), and 80 nm-sized AuNPs lines (dark blue) with 4-MBA as the SERS reporter molecule. (b) Changes of the characteristic SERS intensity at 1075 cm−1 of different-sized AuNPs lines. (c) 5 nm- (black), 10 nm- (red), 20 nm- (blue), and 30 nm-AuNPs lattices (purple) with 4-MBA as the SERS reporter molecule. (d) Changes of the characteristic SERS intensity at 1075 cm−1 of different-sized AuNPs lattices.