Multidimensional Analysis of Nanoparticles with Highly Disperse Properties Using Multiwavelength Analytical Ultracentrifugation

Journal article


Publication Details

Author(s): Walter J, Löhr K, Karabudak E, Reis W, Mikhael J, Peukert W, Wohlleben W, Coelfen H
Journal: ACS nano
Publication year: 2014
Volume: 8
Journal issue: 9
Pages range: 8871--8886
ISSN: 1936-0851
eISSN: 1936-086X
Language: English


Abstract


The worldwide trend in nanoparticle technology toward increasing complexity must be directly linked to more advanced characterization methods of size, shape and related properties, applicable to many different particle systems in science and technology. Available techniques for nanoparticle characterization are predominantly focused on size characterization. However, simultaneous size and shape characterization is still an unresolved major challenge. We demonstrate that analytical ultracentrifugation with a multiwavelength detector is a powerful technique to address multidimensional nanoparticle analysis. Using a high performance optical setup and data acquisition software, information on size, shape anisotropy and optical properties were accessible in one single experiment with unmatched accuracy and resolution. A dynamic rotor speed gradient allowed us to investigate broad distributions on a short time scale and differentiate between gold nanorod species including the precise evaluation of aggregate formation. We report how to distinguish between different species of single-wall carbon nanotubes in just one experiment using the wavelength-dependent sedimentation coefficient distribution without the necessity of time-consuming purification methods. Furthermore, CdTe nanoparticles of different size and optical properties were investigated in a single experiment providing important information on structure-property relations. Thus, multidimensional information on size, density, shape and optical properties of nanoparticulate systems becomes accessible by means of analytical ultracentrifugation equipped with multiwavelength detection.


FAU Authors / FAU Editors

Löhr, Konrad
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Walter, Johannes Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

BASF SE
Universität Konstanz
University of Twente


Research Fields

A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Walter, J., Löhr, K., Karabudak, E., Reis, W., Mikhael, J., Peukert, W.,... Coelfen, H. (2014). Multidimensional Analysis of Nanoparticles with Highly Disperse Properties Using Multiwavelength Analytical Ultracentrifugation. ACS nano, 8(9), 8871--8886. https://dx.doi.org/10.1021/nn503205k

MLA:
Walter, Johannes, et al. "Multidimensional Analysis of Nanoparticles with Highly Disperse Properties Using Multiwavelength Analytical Ultracentrifugation." ACS nano 8.9 (2014): 8871--8886.

BibTeX: 

Last updated on 2019-15-03 at 07:48