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. Author manuscript; available in PMC: 2013 May 13.
Published in final edited form as: Chem Rev. 2008 Nov;108(11):10.1021/cr800443h. doi: 10.1021/cr800443h

Figure 40.

Figure 40

Rousseau et al.308 study on the formation of sheet nacre, with the incipient layer of sheet nacre visualized from mantle and shell side. This type of deposition has been referred to as “staircase” pattern, which leads to the imbricate backsteinbau structure. (a) From the mantle side, a fracture surface was created by forming a hardened replica of the viscous films from which the aragonite tablets evolve (lighter round patches). (b) From the shell side, the forming tablets can be seen within the film, which has separated due to drying artifacts. (c) SEM of shell side showing location of Raman analysis, and (d) corresponding Raman spectra from the region of the tablet (star) and the surrounding film (circle). Both regions show aragonitic peaks. The slope on the top spectrum is from autofluorescence of some unknown species in the film. (Reprinted with permission from ref 308. Copyright 2005 Elsevier Inc..)