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

Peukert W, Karabudak E, Brookes E, Lesnyak V, Gaponik N, Eychmüller A, Walter J, Segets D, Wohlleben W, Demeler B, Cölfen H (2016)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2016

Journal

Angewandte Chemie International Edition Wiley

Publisher: Wiley-VCH Verlag

Book Volume: 55

Pages Range: 11770-11774

Journal Issue: 39

DOI: 10.1002/anie.201603844

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.

Authors with CRIS profile

Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Johannes Walter Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Doris Segets Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

University of Twente NL Netherlands (NL) University of Texas Health Science Center at San Antonio (UTHSCSA) US United States (USA) (US) Technische Universität Dresden DE Germany (DE) BASF SE DE Germany (DE) Universität Konstanz DE Germany (DE)

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://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.

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