Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0168-583X(99)00528-5
Title: Proton micromachining of substrate scaffolds for cellular and tissue engineering
Authors: Sanchez, J.L.
Guy, G. 
Van Kan, J.A. 
Osipowicz, T. 
Watt, F. 
Issue Date: 2-Sep-1999
Citation: Sanchez, J.L., Guy, G., Van Kan, J.A., Osipowicz, T., Watt, F. (1999-09-02). Proton micromachining of substrate scaffolds for cellular and tissue engineering. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 158 (1) : 185-189. ScholarBank@NUS Repository. https://doi.org/10.1016/S0168-583X(99)00528-5
Abstract: Three dimensional patterns (grooves and ridges) were micromachined in PMMA using a 600 keV proton beam from the nuclear microscopy facility at the Research Centre for Nuclear Microscopy, National University of Singapore. Swiss 3T3 fibroblasts (ATCC CCL92, Rockville, MD) have been seeded onto these patterns, and the following observations have been made: (a) Cells were not found in the grooves (depth 9 μm, width 6.6 μm); (b) Cells were highly aligned and elongated on narrow ridges (4.2 μm wide), with the degree of alignment and elongation reduced for wider ridges. The underlying mechanism responsible of this cellular behaviour is assumed to be induced by the mechanical restrictions imposed by the topographic features on cellular migration, cell adhesion and concomitant changes in the cytoskeletal. The use of topographical stimuli to regulate cell function is an area of high potential, with implications in the engineering of tissue for spare-part surgery. Proton micromachining, which has the unique advantage of being the only technique capable of direct-write 3D micromachining at sub-cellular dimensions has unique advantages in this area of research.
Source Title: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
URI: http://scholarbank.nus.edu.sg/handle/10635/112033
ISSN: 0168583X
DOI: 10.1016/S0168-583X(99)00528-5
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