Shape-Tunable Polymer Nanofibrillar Structures by Oblique Electron Beam Irradiation

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Original entry: William Bonificio, AP 225, Fall 2009

Information

Shape-Tunable Polymer Nanofibrillar Structures by Oblique Electron Beam Irradiation Tae-il Kim, Changhyun Pang, Kahp Y. Suh Langmuir 2009 25 (16), 8879-8882


Soft matter keywords

Shape tuning, nanofibrils, adhesion strength, nanovelcro

Summary

The researchers in this experiment were able to tune the shape of polymer nanofibrils using a very accessible and easy method. First they produced a polyurethane acrylate (PUA) nanofibril structure. Then, by bombarding the polymer with electrons at a shallow angle, the nanofibril structure begane bending over forming small hooks. The researchers forsee applications for adhesion as the stuctures resemble gecko setae, or 'nanovelcro'.

Soft matter discussion

SEM image of the final hierarchical structures of the polystyrene spheres at two different length scales.