Fig. 6: Thermal insulation properties of the MNF-structured microsphere compared with commercial SiO2 aerogel powder.

a, b Optical and infrared images of MNF-structured microsphere in a 20 × 20 × 20 mm3 glass box on a heating stage at 100 °C for 30 min. c, d Optical and infrared images of commercial SiO2 aerogel powder under the same conditions. e, f Optical and infrared images of MNF-structured microsphere in a glass box on a heating stage at 280 °C for 30 min. g, h Optical and infrared images of commercial SiO2 aerogel powder under the same conditions.