Fig. 2: Design strategies and characterization of monocrystalline AlN nanofibers (AlN NFs). | Nature Communications

Fig. 2: Design strategies and characterization of monocrystalline AlN nanofibers (AlN NFs).

From: AlN-based aerogel thermo-cooler enabled by enhanced phonon conduction and unconstrained liquid capillarity

Fig. 2: Design strategies and characterization of monocrystalline AlN nanofibers (AlN NFs).

a Schematic illustration of the preparation process for the AlN NFs using a tandem catalyst nanoengineering strategy involving vapor–solid (VS) and vapor–liquid–solid (VLS) mechanisms. b Characterizations of the AlN NFs using scanning electron microscopy (SEM, upper left, scale bar = 20 μm), scanning transmission electron microscopy (STEM, upper right, scale bar = 300 nm), and energy-dispersive X-ray spectroscopy (EDS, bottom, scale bar = 300 nm). c Representative high-resolution transmission electron microscopy (HRTEM) images showing the monocrystalline structure of AlN NFs (scale bar = 5 nm). Inset: the lattice spacing (d) of the AlN NF crystallographic plane. d A single hexagonal wurtzite AlN NF exhibiting flexibility, bending under considerable strain while maintaining structural integrity (scale bar = 10 μm).

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