Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5784
Title: Simultaneous identification of spectral properties and sizes of multiple particles in solution with subnanometer resolution
Authors: Karabudak, Engin
Brookes, Emre
Lesnyak, Vladimir
Gaponik, Nikolai
Eychmüller, Alexander
Walter, Johannes
Segets, Doris
Peukert, Wolfgang
Wohlleben, Wendel
Demeler, Borries
Cölfen, Helmut
Keywords: Nanoparticles
Analytical methods
Colloids
Cadmium telluride
Energy gap
Issue Date: 2016
Publisher: John Wiley and Sons Inc.
Source: Karabudak, E., Brookes, E., Lesnyak, V., Gaponik, N., Eychmüller, A., Walter, J., ...Cölfen, H. (2016). Simultaneous identification of spectral properties and sizes of multiple particles in solution with subnanometer resolution. Angewandte Chemie, 55(39), 11770-11774. 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.
URI: http://doi.org/10.1002/anie.201603844
http://hdl.handle.net/11147/5784
ISSN: 1433-7851
1521-3773
Appears in Collections:Chemistry / Kimya
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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