A new 3D printing method has been developed at the University of Oregon that creates fluorescent structures for medical implants. This technique could make it easier to track implants in the body.
The research team led by Paul Dalton and Ramesh Jasti combined two specialised fields of research: Dalton’s work on the melt-electrowriting technique, a 3D printing process, and Jasti’s research on fluorescent nanohoops. The result is complex structures that glow under UV light.
The melt-electrowriting method makes it possible to print relatively large objects with fine resolution. The integration of nanohoops – ring-shaped, carbon-based molecules – causes the printed objects to glow in different colours under UV light, depending on the size and structure of the rings.
The combination of the two techniques succeeded faster than expected. The nanohoops proved to be stable under the high temperatures of the 3D printing process – an advantage over previously used fluorescent molecules.
The tests showed that the addition of the nanohoops did not affect the stability and biocompatibility of the printed structures. This is a basic requirement for use in medical applications.
Possible areas of application include wound healing technologies, artificial blood vessels and structures for nerve regeneration. In one project, Dalton’s team worked with L’Oreal to develop a multi-layered artificial skin.
The technology could also be relevant for security applications, as the material only glows under UV light and otherwise appears transparent.
Dalton and Jasti have applied for a patent and are planning to commercialise their invention. The collaboration between the research groups demonstrates the potential of interdisciplinary cooperation in science.
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