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Microscopic insight into the bilateral formation of carbon spirals from a symmetric iron core

Shiozawa, H, Bachmatiuk, A, Stangl, A, Cox, DC, Silva, SRP, Ruemmeli, MH and Pichler, T (2013) Microscopic insight into the bilateral formation of carbon spirals from a symmetric iron core SCIENTIFIC REPORTS, 3, ARTN 1.

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Mirrored carbon-spirals have been produced from pressured ferrocene via the bilateral extrusion of the spiral pairs from an iron core. A parametric plot of the surface geometry displays the fractal growth of the conical helix made with the logarithmic spiral. Electron microscopy studies show the core is a crystalline cementite which grows and transforms its shape from spherical to biconical as it extrudes two spiralling carbon arms. In a cross section along the arms we observe graphitic flakes arranged in a herringbone structure, normal to which defects propagate. Local-wave-pattern analysis reveals nanoscale defect patterns of two-fold symmetry around the core. The data suggest that the bilateral growth originates from a globular cementite crystal with molten surfaces and the nano-defects shape emerging hexagonal carbon into a fractal structure. Understanding and knowledge obtained provide a basis for the controlled production of advanced carbon materials with designed geometries.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute
Authors :
Shiozawa, H
Bachmatiuk, A
Stangl, A
Cox, DC
Silva, SRP
Ruemmeli, MH
Pichler, T
Date : 14 May 2013
DOI : 10.1038/srep01840
Uncontrolled Keywords : Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics, GRAPHITIC CARBON, GROWTH, NANOCRYSTALS, MECHANISM, DEPOSITION, NANOTUBES, CHEMISTRY, FIBERS, CHAOS
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:21
Last Modified : 31 Oct 2017 15:12

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