Simultaneous Identification of Spectral Properties and Sizes of Multiple Particles in Solution with Subnanometer Resolution

Journal article
(Original article)


Publication Details

Author(s): Peukert W, Karabudak E, Brookes E, Lesnyak V, Gaponik N, Eychmüller A, Walter J, Segets D, Wohlleben W, Demeler B, Cölfen H
Journal: Angewandte Chemie International Edition
Publisher: Wiley-VCH Verlag
Publication year: 2016
Volume: 55
Journal issue: 39
Pages range: 11770-11774
ISSN: 1433-7851
eISSN: 1521-3773
Language: English


Abstract


We report an unsurpassed solution characterization technique based on analytical ultracentrifugation, which demonstrates exceptional potential for resolving particle sizes in solution with sub-nm resolution. We achieve this improvement in resolution by simultaneously measuring UV/Vis spectra while hydrodynamically separating individual components in the mixture. By equipping an analytical ultracentrifuge with a novel multi-wavelength detector, we are adding a new spectral discovery dimension to traditional hydrodynamic characterization, and amplify the information obtained by orders of magnitude. We demonstrate the power of this technique by characterizing unpurified CdTe nanoparticle samples, avoiding tedious and often impossible purification and fractionation of nanoparticles into apparently monodisperse fractions. With this approach, we have for the first time identified the pure spectral properties and band-gap positions of discrete species present in the CdTe mixture.



FAU Authors / FAU Editors

Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Segets, Doris 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
Technische Universität Dresden
Universität Konstanz
University of Texas Health Science Center at San Antonio (UTHSCSA)
University of Twente


Research Fields

A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Peukert, W., Karabudak, E., Brookes, E., Lesnyak, V., Gaponik, N., Eychmüller, A.,... Cölfen, H. (2016). Simultaneous Identification of Spectral Properties and Sizes of Multiple Particles in Solution with Subnanometer Resolution. Angewandte Chemie International Edition, 55(39), 11770-11774. https://dx.doi.org/10.1002/anie.201603844

MLA:
Peukert, Wolfgang, et al. "Simultaneous Identification of Spectral Properties and Sizes of Multiple Particles in Solution with Subnanometer Resolution." Angewandte Chemie International Edition 55.39 (2016): 11770-11774.

BibTeX: 

Last updated on 2019-13-03 at 10:53