@article{42ed46cdce6d45eb968c3125d36e7aed,
title = "Simultaneous Identification of Spectral Properties and Sizes of Multiple Particles in Solution with Subnanometer Resolution",
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.",
keywords = "analytical methods, colloids, nanoparticles",
author = "Engin Karabudak and Emre Brookes and Vladimir Lesnyak and Nikolai Gaponik and Alexander Eychm{\"u}ller and Johannes Walter and Doris Segets and Wolfgang Peukert and Wendel Wohlleben and Borries Demeler and Helmut C{\"o}lfen",
note = "Funding Information: We acknowledge the Max-Planck Society as well as BASF SE, Ludwigshafen for financial support of this project. The development of the data analysis methods was supported by the National Institutes of Health grant RR022200 (B.D.) and NSF ACI-1339649 (B.D.), and supercomputer time on XSEDE resources at the Texas Advanced Computing Center was provided by National Science Foundation grant TG-MCB070039N (B.D.). J.W. and W.P. acknowledge financial support of DFG through project ?PE 427/28-1? andJ.W., D.S., and W.P. thank the Erlangen Cluster of Excellence ?Engineering of Advanced Materials?. Funding Information: We acknowledge the Max-Planck Society as well as BASF SE, Ludwigshafen for financial support of this project. The development of the data analysis methods was supported by the National Institutes of Health grant RR022200 (B.D.) and NSF ACI-1339649 (B.D.), and supercomputer time on XSEDE resources at the Texas Advanced Computing Center was provided by National Science Foundation grant TG-MCB070039N (B.D.). J.W. and W.P. acknowledge financial support of DFG through project “PE 427/28-1” andJ.W., D.S., and W.P. thank the Erlangen Cluster of Excellence “Engineering of Advanced Materials”. Publisher Copyright: {\textcopyright} 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2016",
month = sep,
day = "19",
doi = "10.1002/anie.201603844",
language = "English (US)",
volume = "55",
pages = "11770--11774",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "39",
}