Abstract
The jaws of the marine worm Nereis sp. are made of protein fibers and are reinforced by zinc. Here we study a transverse section through the jaw using optical microscopy and nanoindentation. Optical microscopy images demonstrate a complex microstructure which includes channels that extend throughout the jaw. We suggest that these channels may be related to jaw remodeling. The mechanical results reveal spatial variations in both indentation hardness and reduced modulus. Specifically, the toothed side of the jaw (used for grasping food) is harder than the remainder of the jaw and the very exterior surface is hardest.
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References
H.A. Lowenstam and S. Weiner, On Biomineralization (Oxford University Press, New York, NY, 1989).
S.O. Andersen, M.G. Peter and P. Roepstorff, Comp. Biochem. Physiol. B 113, 689 (1996).
H.C. Lichtenegger, T. Schöberl, M.H. Bartl, H. Waite and G.D. Stucky, Science 298, 389 (2002).
H.C. Lichtenegger, T. Schöberl, J.T. Ruokolainen, J.O. Cross, S.M. Heald, H. Birkedal, J.H. Waite and G.D. Stucky, Proc. Natl. Acad. U.S.A. 100, 9144 (2003).
H.C. Lichtenegger, H. Birkedal, D.M. Casa, J.O. Cross, S.M. Heald, J.H. Waite and G.D. Stucky, Chem. Mater. In press (2005).
G.W. Bryan and P.E. Gibbs, J. Mar. Biol. Ass. U.K. 59, 969 (1980).
G.W. Bryan and P.E. Gibbs, J. Mar. Biol. Ass. U.K. 60, 641 (1980).
M. Eriksson and M. Elfman, Lethaia 33, 75 (2000).
H. Birkedal, R.K. Khan, N. Slack, C. Broomel, H.C. Lichtenegger, F. Zok, G.D. Stucky and J.H. Waite, in preparation (2005).
W.C. Oliver and G.M. Pharr, J. Mater. Res. 7, 1564 (1992).
P.J. Olive in Skeletal Growth of Aquatic Organisms: Biological Records of Environmental Change edited by D.C. Rhoads and R.A. Lutz (Plenum Press, New York, NY, 1980) pp. 561–592.
S. Suresh, Science 292, 2447 (2001).
K.M. Dorgan, P.A. Jumars, B. Johnson, B.P. Boudreau and E. Landis, Nature 433, 45 (2005).
J.H. Waite, H.C. Lichtenegger, G.D. Stucky and P. Hansma, Biochemistry 43, 7653 (2004).
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Birkedal, H., Broomell, C., Khan, R.K. et al. The Jaws of Nereis: Microstructure and Mechanical Properties. MRS Online Proceedings Library 874, 28 (2005). https://doi.org/10.1557/PROC-874-L2.8/K2.8
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DOI: https://doi.org/10.1557/PROC-874-L2.8/K2.8