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Scattering functions of yolk–shell particles
Author(s) -
Li Xin,
Liu KaoHsiang,
Wu Bin,
SanchezDiaz Luis Enrique,
Smith Gregory S.,
Chen WeiRen
Publication year - 2013
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889813022917
Subject(s) - scattering , shell (structure) , particle (ecology) , small angle scattering , neutron scattering , molecular physics , small angle neutron scattering , scattering amplitude , biological small angle scattering , form factor (electronics) , structure factor , physics , core (optical fiber) , chemistry , optics , materials science , condensed matter physics , quantum mechanics , oceanography , composite material , geology
The single‐particle small‐angle scattering properties of the yolk–shell particle, a new type of core–shell particle with a mobile core within the hosting shell, are systematically investigated. The Debye spatial autocorrelation function, pair distance distribution function and intraparticle structure factor (form factor) are calculated and compared with the corresponding scattering functions of reference systems of hard sphere and concentric core–shell particles with identical sizes. On the basis of these theoretical calculations, it is found that the broken centrosymmetry, originating from the mobility of the trapped yolk, results in an imaginary scattering amplitude. As a result, it contributes an additional destructive interference term which smears certain features present in the scattering functions of the reference systems. These theoretical models raise the prospect of jointly using small‐angle neutron and X‐ray scattering techniques to quantitatively determine the structural characteristics of yolk–shell particles.