Analysis of Giant-Shell CdSe/CdS Quantum Dots via Analytical Ultracentrifugation Combined with Spectrally Resolved Photoluminescence

Stiegler L, Wegner KD, Weigert F, Peukert W, Resch-Genger U, Walter J (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Small Methods John Wiley & Sons Ltd

Article Number: 2401700

DOI: 10.1002/smtd.202401700

Abstract

Knowledge of the structure–property relationships of functional nanomaterials, including, for example, their size- and composition-dependent photoluminescence (PL) and particle-to-particle variations, is crucial for their design and reproducibility. Herein, the Angstrom-resolution capability of an analytical ultracentrifuge combined with an in-line multiwavelength emission detection system (MWE-AUC) for measuring the sedimentation coefficient-resolved spectrally corrected PL spectra of dispersed nanoparticles is demonstrated. The capabilities of this technique are shown for giant-shell CdSe/CdS quantum dots (g-QDs) with a PL quantum yield (PL QY) close to unity capped with oleic acid and oleylamine ligands. The MWE-AUC PL measurements are calibrated and validated with certified fluorescence standards. The spectrally corrected and size-dependent PL spectra of the g-QDs derived from a single MWE-AUC experiment are then analyzed and compared with the results of single-particle spectroscopic studies, yielding the PL spectra, decay kinetics, and blinking behavior of individual g-QDs. This study underlines the vast potential of MWE-AUC with in-line optical detection for the characterization of advanced nanomaterials with a complex structure.

Authors with CRIS profile

Lisa Stiegler Lehrstuhl für Partikelsynthese (LFG) Wolfgang Peukert Lehrstuhl für Partikelsynthese (LFG) Johannes Walter Lehrstuhl für Partikelsynthese (LFG)

Involved external institutions

Bundesanstalt für Materialforschung und -prüfung (BAM) DE Germany (DE)

How to cite

APA:

Stiegler, L., Wegner, K.D., Weigert, F., Peukert, W., Resch-Genger, U., & Walter, J. (2025). Analysis of Giant-Shell CdSe/CdS Quantum Dots via Analytical Ultracentrifugation Combined with Spectrally Resolved Photoluminescence. Small Methods. https://doi.org/10.1002/smtd.202401700

MLA:

Stiegler, Lisa, et al. "Analysis of Giant-Shell CdSe/CdS Quantum Dots via Analytical Ultracentrifugation Combined with Spectrally Resolved Photoluminescence." Small Methods (2025).

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