Science Advances

Supplementary Materials

The PDF file includes:

  • Fig. S1. Chemical structure of oligomers formed during polydopamine coating under St-Bc pH conditions analyzed by HPLC-MS with a C18 column.
  • Fig. S2. XPS analyses of polydopamine-coated TiO2 surfaces after 1 hour of strong base treatment.
  • Fig. S3. Maintenance of polydopamine coating on a TPU film in 0.1 N KOH (pH 12) solution for 1 hour.
  • Fig. S4. Intercalation of NMe4+ on polydopamine coating with pH variations.
  • Fig. S5. Wettability of polydopamine-coated substrates in Md-Bc and St-Bc conditions in the presence and absence of 1 M choline, a precursor to neurotransmitter ACh.
  • Fig. S6. Surface morphologies of the NMe4+-intercalated polydopamine functionalized surfaces at St-Bc with 0.1 M NMe4+ (top) and 1 M NMe4+ (bottom) by SEM and atomic force microscopy analyses.

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.mp4 format). Stability of polydopamine coating in NaOH, DDW, and KOH solution.

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