Fig. 3: SERS properties for the SS and SA series of W-TNT samples. | Nature Communications

Fig. 3: SERS properties for the SS and SA series of W-TNT samples.

From: Polymer-guided grafting of single W atoms onto titanate nanotubes increases SERS activity in semiconductors

Fig. 3

Raman spectra of (a) MB (1.0 × 10−5 M) and d 4MBA (1.0 × 10−4 M) collected on W-TNT-300, W-TNT-400, W-TNT-600, W-TNT-800, and W-TNT-1000. In the molecular schematic, atoms are colored brown (C) for carbon, blue (N) for nitrogen, yellow (S) for sulfur, pale pink (H) for hydrogen, and red (O) for oxygen. Raman spectra of (b) MB (1.0 × 10−5 M) and e 4MBA collected on W-TNT-600, 74%W-TNT-600, 54%W-TNT-600, 39%W-TNT-600, and 19%W-TNT-600. Enhancement factors of two series of samples for (c) MB (1.0 × 10−5 M) and f 4MBA (1.0 × 10−4 M). g Raman spectra of MB at concentrations ranging from 10−5 to 10−9 M collected on 54%W-TNT-600. The spectra corresponding to 10−9 M are magnified by a factor of 5. h Raman spectra of 4MBA at concentrations ranging from 10−4 to 10−7 M collected on 54%W-TNT-600. i Raman spectra of BPA, DA, Cyt, and Tyr at concentrations of 10−3M collected on 54%W-TNT-600. Source data are provided as a Source Data file.

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