Science Advances

Supplementary Materials

This PDF file includes:

  • Computational steps to relate whole-body and regional sweat Na+ secretion
  • Fig. S1. Printing process of the sensing layer includes layering silver base electrodes, conductive graphite ink, dielectric polymer ink, and spiral silver lines.
  • Fig. S2. Representative glucose sensor chronoamperometry curve with transient portion included and reproducibility of glucose sensors.
  • Fig. S3. Regional Na+ and sweat rate correlations on the forehead, forearm, underarm, and back of subject 1.
  • Fig. S4. Whole-body fluid loss rate vs. regional sweat rate correlations.
  • Fig. S5. Predicted whole-body Na+ secretion rate versus measured forearm Na+ secretion rate of subject 1.
  • Fig. S6. Off-body analysis of Na+ and K+ relation in iontophoresis sweat across multiple trials (marked in different colors) for six subjects.
  • Fig. S7. High-performance liquid chromatography (HPLC) analysis of sweat samples and comparison with sweat sensor response.
  • Fig. S8. Comparison and correlation of blood glucose measured by blood glucose meter, sweat measured by HPLC, and the sweat glucose sensors.
  • Table S1. Processing parameters used in R2R printing.
  • Table S2. Blood glucose measurements for population studies.

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