Fig. 3: Macroscopic and microscopic geometry of the self-supporting WS.

a Optical image of the WS. b Microscopic image of the WS with 10x objective lens. c AFM images of the hub diaphragm edge in the WS. d Height profile of the hub diaphragm edge indicates that the T is approximately 1.96 μm. e AFM images of one thread in the WS. f Height and width profile of a thread indicate the upper width being about 3.7 μm and bottom width being about 4.1 μm