Microscale polymeric helical structures produced by electrospinning

Micro helical polymeric structures produced by variable voltage direct electrospinning

Direct near field electrospinning is used to produce very long helical polystyrene microfibers in water. The pitch length of helices can be controlled by changing the applied voltage, allowing to produce both micro springs and microchannels. Using a novel high frequency variable voltage electrospinning method we found the helix formation speed and compared the experimental buckling frequency to...

The fabrication of polymeric nanochannels by electrospinning.

Polymeric nanochannels have been fabricated using a cost-effective, fast, one-step method involving the collision of nanosized jets during electrospinning. The nanochannels had a uniform U-shaped cross-section, with a height below 100 nm and lengths around 1 mm. It was explained that the strength of the electric field had an important effect on the formation of the nanochannels. An adhesion tes...

Microscale electrospinning of polymer nanofiber interconnections

Novel Polyimide Materials Produced by Electrospinning

Due to one-dimentional nanostructures’ unique properties and their intriguing applications, there has being a great demanding on the technologies which are able to produce such structures. Among the applicable strategies, electrospinning seems to be the simplest approach to generate continues nanofibers with ultrathin and uniform diameters (Li & Xia, 2004). Electrospinning is a spin technology ...

Crystalline structures of polymeric hydrocarbon with 3,4-fold helical chains

Molecular hydrocarbons are well-known to polymerize under pressure to form covalently bonded frameworks. Here we predict by ab initio calculations two distinct three-dimensional hydrocarbon crystalline structures composed of 3-fold and 4-fold helical CH chains in rhombohedral (R3) and tetragonal (I4₁/a) symmetry, respectively. Both structures with 1:1 stoichiometry are found to be energetically...