Show simple item record Walter, Johannes Gorbet, Gary E. Akdas, Tugce Segets, Doris Demeler, Borries Peukert, Wolfgang 2021-09-28T19:58:42Z 2021-09-28T19:58:42Z 2017
dc.identifier.citation Walter, J., Gorbet, G., Akdas, T., Segets, D., Demeler, B., & Peukert, W. (2017). 2D analysis of polydisperse core-shell nanoparticles using analytical ultracentrifugation. Analyst, 142(1), 206-217. en_US
dc.description Accepted author manuscript en_US
dc.description.abstract Accurate knowledge of the size, density and composition of nanoparticles (NPs) is of major importance for their applications. In this work the hydrodynamic characterization of polydisperse core–shell NPs by means of analytical ultracentrifugation (AUC) is addressed. AUC is one of the most accurate techniques for the characterization of NPs in the liquid phase because it can resolve particle size distributions (PSDs) with unrivaled resolution and detail. Small NPs have to be considered as core–shell systems when dispersed in a liquid since a solvation layer and a stabilizer shell will significantly contribute to the particle's hydrodynamic diameter and effective density. AUC measures the sedimentation and diffusion transport of the analytes, which are affected by the core–shell compositional properties. This work demonstrates that polydisperse and thus widely distributed NPs pose significant challenges for current state-of-the-art data evaluation methods. The existing methods either have insufficient resolution or do not correctly reproduce the core–shell properties. First, we investigate the performance of different data evaluation models by means of simulated data. Then, we propose a new methodology to address the core–shell properties of NPs. This method is based on the parametrically constrained spectrum analysis and offers complete access to the size and effective density of polydisperse NPs. Our study is complemented using experimental data derived for ZnO and CuInS2 NPs, which do not have a monodisperse PSD. For the first time, the size and effective density of such structures could be resolved with high resolution by means of a two-dimensional AUC analysis approach. en_US
dc.language.iso en_US en_US
dc.publisher Royal Society of Chemistry en_US
dc.subject Core-shell nanoparticles en_US
dc.subject Analytical ultracentrifugation en_US
dc.subject 2D analysis en_US
dc.subject 2-dimensional
dc.subject.lcsh Ultracentrifugation
dc.subject.lcsh Nanoparticles
dc.title 2D analysis of polydisperse core-shell nanoparticles using analytical ultracentrifugation en_US
dc.type Article en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Chemistry and Biochemistry en_US
dc.description.peer-review Yes en_US
dc.publisher.institution Friedrich-Alexander-Universitat Erlangen-Nurnberg (FAU) en_US
dc.publisher.institution University of Texas Health Science Center at San Antonio en_US
dc.publisher.institution University of Lethbridge en_US
dc.publisher.url en_US

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