title: Eshelby Twist as a Possible Source of Lattice Rotation in a Perfectly Ordered Protein/Silica Structure Grown by a Simple Organism.
abstract: The formation mechanism of a perfectly ordered protein/silica structure in the axial filament of the anchor spicule of the silica sponge Monorhaphis chuni is suggested. Experimental evidence shows that the growth of this architecture is realized by a thermodynamically driven dislocation-mediated spiral growth mechanism, resulting in a specific rotation of the mesoscopic crystal lattice (Eshelby twist).
authors.affiliation: Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, 14476, Germany.
authors.forename: Igor
authors.initials: I
authors.lastname: Zlotnikov
authors.affiliation: Max Planck Institute of Microstructure Physics, 06120, Halle, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Werner
authors.affiliation: Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, 14476, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Fratzl
authors.affiliation: Department of Materials Science and Engineering, Technion, Haifa, 32000, Israel.
authors.forename: Emil
authors.initials: E
authors.lastname: Zolotoyabko
mesh_terms: D000818:Animals; D003460:Crystallization; D055032:Electron Microscope Tomography; D016326:Extracellular Matrix Proteins / Q000737:chemistry* / Q000378:metabolism*; D008968:Molecular Conformation; D011161:Porifera / Q000378:metabolism*; D012399:Rotation; D012822:Silicon Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D016326:Extracellular Matrix Proteins; D012822:Silicon Dioxide
keywords: Eshelby twists; biocomposites; marine sponges; protein/silica mesoscopic crystals; screw dislocations