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Received August 13, 2016
Accepted November 29, 2016
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Scattering model for tetrapods with cylindrical arms
The National CRI Center for Intelligent Hybrids The WCU Program of Chemical Convergence for Energy & Environment School of Chemical & Biological Engineering, Seoul National University, Seoul 08826, Korea
khchar@plaza.snu.ac.kr
Korean Journal of Chemical Engineering, April 2017, 34(4), 1192-1198(7)
https://doi.org/10.1007/s11814-016-0341-x
https://doi.org/10.1007/s11814-016-0341-x
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Abstract
A scattering model for regular tetrapods, which are the endoskeleton structure of regular tetrahedrons, is presented. Since a tetrapod, unlike spheres and cylinders, is an anisotropic structure formed by four cylinders branching out from the centroid to the vertices of a tetrahedron, additional symmetry elements and random orientation must be accounted for to develop its scattering model. The scattering function of tetrapods was derived from the modification of the scattering model for cylinders and their structural regularity was simplified. Scattering intensity profiles and pair distance distribution functions were obtained by numerical calculation and compared with the experimental data from small angle X-ray measurements of CdSe tetrapod nanocrystals.
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References
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Malkmus S, Kudera S, Manna L, Parak WJ, Braun M, J. Phys. Chem. B, 110(35), 17334 (2006)
Lim J, Bae WK, Park KU, zur Borg L, Zentel R, Lee S, Char K, Chem. Mater., 25, 1443 (2013)
Lim J, zur Borg L, Dolezel S, Schmid F, Char K, Zentel R, Macromol. Rapid Commun., 35(19), 1685 (2014)
Guinier and Fournet, Small Angle X-Ray Scattering, Wiley, New York (1955).
Pedersen JS, Adv. Colloid Interface Sci., 70, 171 (1997)
Roe RJ, Methods of x-ray and neutron scattering in polymer science, Oxford University Press (2000).
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Miszta K, de Graaf J, Bertoni G, Dorfs D, Brescia R, Marras S, Ceseracciu L, Cingolani R, van Roij R, Dijkstra M, Manna L, Nat. Mater., 10(11), 872 (2011)
Conca E, Aresti M, Saba M, Casula MF, Quochi F, Mula G, Loche D, Kim MR, Manna L, Corrias A, Mura A, Bongiovanni G, Nanoscale, 6, 2238 (2014)
