**2.6. Vapor-phase polymerization**

Polymer MNFs have also been fabricated from vapor-phase polymerization. Plasmainduced polymerization of vapor phase vinyltrichlorosilane produced organosiloxane fibers with diameters around 25 nm and typical lengths of 400–600 nm and cyanoacrylate fibers with diameters from 100 to 400 nm and lengths of hundreds of microns (Fig. 6) [52,53].

**Figure 6.** (a) Schematic describing a proposed mechanism for nanofiber formation by vapor-phase polymerization (b) Arial (1) and side views (2) of polymer nanofibers fabricated from vapor-phase polymerization at high (b), intermediate (c) and low (d) packing densities [52].
