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X-ray ablation of hyaluronan hydrogels: Fabrication of three-dimensional microchannel networks

J. Appl. Phys. 106, 053518 (2009); doi:10.1063/1.3213358

Published 10 September 2009

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B. M. Weon,1,2 S. Chang,2 J. Yeom,3 S. K. Hahn,3 J. H. Je,2 Y. Hwu,4 and G. Margaritondo5
1Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
2Department of Materials Science and Engineering, X-ray Imaging Center, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
3Department of Materials Science and Engineering, Biomedical Nanomaterials Lab, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
4Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan
5Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
We present a simple and highly versatile protocol for polymer ablation: hard x-ray irradiation makes it possible to rapidly depolymerize hyaluronan hydrogels and fabricate three-dimensional network of microchannels. Photodynamic and photochemical analyses show that x-ray irradiation directly cleaves the polymer backbone and the total dose controls the degradation kinetics. This nonthermal ablation protocol may offer opportunities for processing organic polymers and biological materials. ©2009 American Institute of Physics
History: Received 13 May 2009; accepted 5 August 2009; published 10 September 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/053518/1
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0021-8979 (print)   1089-7550 (online)
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