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(Color online) Suspended fibers between polymerized supports. (a) SEM image of suspended fibers. The fibers thinned down when the scan speed was accelerated in the direction indicated by the arrow. (b) Feature sizes vs scan speed at a power of . (d) SEM image of a suspended fiber fabricated at a scan speed of and power of . The spacing between two supports was .
(Color online) Feature sizes of lines fabricated between two closely transposed supports. The pulse power was , the scan speed was , and the spacing was . Besides the fibers (L1, L2) along the traces of the laser focus as indicated by the black arrows, there were extra fibers and structures (F1–F3, etc.) as indicated by the white arrows.
(Color online) Repolymerization between two closely transposed supports. At a power of , no structure was observed between two supports when the spacing was wider than (areas S1 and S2); when the spacing was reduced to (area S3), bundles of fibers appeared due to strong repolymerization.
(Color online) Isolated repolymerized fibers between pairs of rods. The laser power was . When ends of a pair of rods approached, repolymerization became strong enough to form fibers between rods. The closer the spacing, the stronger the repolymerization to produce thicker structures.
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