Science Advances

Supplementary Materials

The PDF file includes:

  • Section S1. The calculated bending stiffness of the thin film
  • Section S2. The measured bending stiffness of the thin film
  • Fig. S1. Fabrication of the freestanding hybrid NM with the orthogonal AgNW array by removing the sacrificial layer.
  • Fig. S2. Total thickness of the hybrid NM measured by atomic force microscopy.
  • Fig. S3. Transmittance in the visible range of 400 to 800 nm and corresponding sheet resistance, Rs, of the orthogonal AgNW array with different numbers of orthogonal coatings.
  • Fig. S4. The structural design of the hybrid NM for the calculation of the bending stiffness with geometrical parameters illustrated.
  • Fig. S5. SEM images of the hybrid NM folded in half.
  • Fig. S6. High-magnitude SEM images of the hybrid NM transferred on the line-patterned PDMS with a line width of 20 μm.
  • Fig. S7. Estimated step surface coverage of the hybrid NMs with different thickness placed on a micropyramid-patterned PDMS substrate.
  • Fig. S8. Number of wrinkles generated from a pure parylene NM and hybrid NMs.
  • Fig. S9. Variation in the number of wrinkles N as a function of N ~ a1/2h−3/4.
  • Fig. S10. Indentation test for measuring the mechanical properties of NMs.
  • Fig. S11. Loading-unloading indentation test.
  • Fig. S12. IR images of the orthogonal AgNW array with AC 10 V applied at a frequency of 10 kHz.
  • Fig. S13. SPL versus distance between the commercial microphone and the thick-film loudspeaker with the orthogonal AgNW array.
  • Fig. S14. Theoretical values of SPL as a function of sound frequency for loudspeaker with different thickness and substrates.
  • Fig. S15. Comparison of adhesion force of various micropatterned PDMS films.
  • Fig. S16. Schematics showing the structure of microphone devices.
  • Fig. S17. Waveform and STFT signals of original sound (“There’s plenty of room at the bottom”) extracted by the sound wave analyzer, where the signal was read from a commercial microphone.
  • Fig. S18. FFTs extracted from the sound wave of the word “nanomembrane” obtained from voices of different subjects including the registrant, the authorized user, and the denied user.
  • Fig. S19. FFTs extracted from the sound wave, obtained from the voice of a registrant.
  • Fig. S20. FFTs for a test repeated 10 times, extracted from the sound wave of the word “hello” obtained from various voices of different subjects including the registrant, a man, and two women.

Download PDF

Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.mp4 format). Mechanical durability of hybrid NM.
  • Movie S2 (.mp4 format). Compression and stretching test of hybrid NM.
  • Movie S3 (.mp4 format). Skin-attachable NM loudspeaker.
  • Movie S4 (.mp4 format). The voice recognition using NM microphone.
  • Movie S5 (.mp4 format). Voice-based security system.

Files in this Data Supplement: