Science Advances

Supplementary Materials

The PDF file includes:

  • Supplementary Materials and Methods
  • Fig. S1. Characterizations of NP precursors.
  • Fig. S2. Self-healing behavior of NH4F-induced gold hydrogels.
  • Fig. S3. Digital photos of gelation behavior of gold NPs induced by different salts.
  • Fig. S4. Digital photos of gelation behavior of gold NPs induced by four typical salts.
  • Fig. S5. Zeta potential of gold NP solution after addition of different salts.
  • Fig. S6. Time-lapse hydrodynamic size evolution during gelation.
  • Fig. S7. The low-threshold gelation concentration and ligament sizes versus anions.
  • Fig. S8. Residual analysis of as-prepared gold aerogels.
  • Fig. S9. Energies derived by DFT calculations.
  • Fig. S10. Proposed nanoscale force analysis and gelation mechanism.
  • Fig. S11. Demonstration of the ligament size manipulation of gold aerogels using specific salts.
  • Fig. S12. Nitrogen adsorption tests of different gold aerogels.
  • Fig. S13. The relation of ligament size and precursors concentration.
  • Fig. S14. Digital photos of gold gels initiated by other salts.
  • Fig. S15. Demonstration and characterizations of diverse NMAs.
  • Fig. S16. Ligament size manipulation of NMAs.
  • Fig. S17. Scanning TEM–EDX analysis of different alloy gels prepared by one-step method.
  • Fig. S18. High-angle annular dark-field scanning transmission electron microscopy imaging and EDX analysis of core-shell structured alloy gels.
  • Fig. S19. SEM images of uncompressed aerogels.
  • Fig. S20. Cross-sectional SEM images of compressed aerogels.
  • Fig. S21. Electrocatalytic performance of different commercial and gel catalysts.
  • Table S1. Summary of the gelation behavior of gold induced by different salts.
  • Table S2. Summary of nitrogen adsorption data and ligament sizes of as-prepared aerogels.
  • Table S3. Elemental analysis of different alloy aerogels.
  • Table S4. Comparison of parameters of NMFs in literature.
  • References (3950)

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.mp4 format). Demonstration of as-prepared black gels, brown gels, and black powders.
  • Movie S2 (.mp4 format). Demonstration of pressing original aerogels into shining materials.
  • Movie S3 (.mp4 format). Demonstration of self-propelled rotation of compressed Au-Ag aerogel.

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