Science Advances

Supplementary Materials

This PDF file includes:

  • Fig. S1. Extracting the real contact area from the fluorescence images.
  • Fig. S2. Fluorescence and reflections observed at a PS-on-glass interface.
  • Fig. S3. Fluorescence intensity and (normal) pressure.
  • Fig. S4. Atomic force microscopy.
  • Fig. S5. Frictional aging on different substrates.
  • Fig. S6. Frictional shear strength.
  • Fig. S7. Normal and friction force during slip.

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