Science Advances

Supplementary Materials

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  • Fig. S1. Cross-sectional SEM images of ISO-64k–derived material nitrided in one step at 1050°C.
  • Fig. S2. Two-dimensional SAXS patterns of ISO-64k–derived samples at various processing stages.
  • Fig. S3. Two-dimensional SAXS patterns of ISO-86k–derived samples at various processing stages.
  • Fig. S4. SEM images of ISO-64k–derived mesoporous samples at different processing stages.
  • Fig. S5. Cross-sectional SEM images of an ISO-64k–derived monolith after final nitriding at 850°C.
  • Fig. S6. Cross-sectional SEM images of an ISO-86k–derived monolith after final nitriding at 865ºC.
  • Fig. S7. N2 adsorption/desorption isotherms for ISO-64k–derived powder samples calcined at 450ºC, nitrided at 700ºC, and nitrided at 850ºC.
  • Fig. S8. XRD-derived lattice spacing as a function of nitriding temperature for NbN fibers (17); black circles and fit and our materials (red squares).
  • Fig. S9. TEM micrographs of nitrides derived from (A) ISO-64k and (B) ISO-86k after final heat treatments.
  • Fig. S10. High-resolution TEM micrograph of ISO-64k–derived nitride after final heat treatment.
  • Fig. S11. High-resolution TEM micrograph of ISO-86k–derived nitride after final heat treatment.
  • Fig. S12. Magnetization behavior of ISO-64k–derived 850ºC gyroidal NbN material from 2.5 to 30 K, measured in a perpendicular orientation with an applied field of 70 Oe.
  • Fig. S13. Field-cooled magnetization behavior of ISO-86k–derived 865ºC gyroidal NbN material from 2 to 30 K, measured in a perpendicular orientation with an applied field of 50 Oe.
  • Fig. S14. Field-sweeping magnetization behavior at 2.5 K of ISO-64k–derived NbN material heat-treated to 850°C.
  • Fig. S15. High-field magnetization behavior at 2.5 K of ISO-86k–derived NbN material heat-treated to 865ºC.
  • Fig. S16. Two-dimensional (A) and integrated (B) SAXS patterns of ISO-86k–derived material processed in the same batch as that in fig. S3.
  • Fig. S17. Photograph of the four-point conductivity measurement apparatus.
  • Table S1. Surface area and pore volume (as measured by N2 sorption) of ISO-64k–derived materials at different stages of thermal processing.

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