Science Advances

Supplementary Materials

The PDF file includes:

  • Fig. S1. Scheme of the fabrication steps of the dual-layered wireless, battery-free oximeters.
  • Fig. S2. Scheme of wireless oximeters with different designs of injectable filaments.
  • Fig. S3. Optical images of the tip end of injectable filaments of wireless oximeters.
  • Fig. S4. Photographs of wireless oximeters with battery-powered electronic modules.
  • Fig. S5. Photograph of a battery-free, fully implantable, wireless oximeter on a balance.
  • Fig. S6. Ratio of extinction coefficients of HbO2 and Hb.
  • Fig. S7. Scheme of the epitaxial stack of GaAs wafers used for the fabrication of μ-IPDs.
  • Fig. S8. Scheme and pseudocolored SEM image of GaAs-based μ-IPDs.
  • Fig. S9. Characterizations of μ-IPD and μ-ILEDs.
  • Fig. S10. Monte Carlo simulation results.
  • Fig. S11. Scheme of the experimental arena circumflexed with antenna for wireless power supply.
  • Fig. S12. Transmittance spectra of mouse scalp collected by a fiber optic spectrometer.
  • Fig. S13. Fluctuations in output signals (ΔI/I) of the wireless, battery-free oximeters over time.
  • Fig. S14. Absorption spectra of five artificial blood solutions with various combinations of oxyhemoglobin, deoxyhemoglobin, and metHb.
  • Fig. S15. Raw data of rStO2 collected by wireless, battery-powered oximetry implants in the tissue region near femoral artery of anesthetized rats.
  • Fig. S16. Surgical steps of the subdermal implantation of wireless, battery-free oximeters in mouse brain.
  • Fig. S17. Wireless oximetry data on mice with subdermally implanted, battery-free devices in the brain.
  • Fig. S18. Photographs of freely moving mice with brain-implanted oximeter filaments with connectors for the integration with battery-powered electronics.
  • Fig. S19. Weight changes of three mice after subdermal brain surgery with wireless, battery-free oximetry implants.
  • Table S1. Data transmission of the wireless, battery-free oximeters before and after subdermal implantation.
  • Legend for movie S1

Download PDF

Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.mp4 format). A wireless, battery-free, fully implantable oximeter with illuminating μ-ILEDs.

Files in this Data Supplement: