The design relies on a vertically oriented twisted wire spinneret, on which the electrospinning solution is brought. Gravitational force and the twist in the wire cause the solution to enter a rotational downward flow. During this, the solution is electrospun to nanofibers simultaneously from multiple jet eruption points leading to high production rates.

Widely applicable

In this study the preparation of polyvinyl pyrrolidone and inorganic hydroxyapatite and bioglass fibers is demonstrated. However, the design is by no means restricted to these materials and can also be applied to other materials that can be prepared by electrospinning. The fiber properties can be easily controlled by the solution properties and operating parameters; similar to conventional electrospinning.


Aside from the solution itself there are no moving parts. This makes the system extremely simple to set up and use, especially when compared to most other needleless designs. The main limitation of the design is the drying of the solution onto the wire. This limits the volume that can be electrospun in a single experiment. Automated cleaning systems should be incorporated to enable continuously running processes.

The developed system can be easily adapted by laboratories worldwide and it provides a simple new way to increase the productivity for applications where high amounts of fibers are needed.

The researchers presented their work in the journal Nanotechnology 26 025301.

Further reading

Interview with Markku Leskelä and Mikko Ritala
Nanotubes help turn stem cells into cartilage (Sept 2013)
Injectable nanofibres support heart tissue (Sept 2012)