New study on giant-shell CdSe/CdS quantum dots via analytical ultracentrifugation combined with spectrally resolved photoluminescence published
In this study, Stiegler et al. present an advanced method for characterizing giant-shell CdSe/CdS quantum dots (g-QDs) by integrating analytical ultracentrifugation (AUC) with a multiwavelength emission detection system (MWE-AUC). This innovative approach enables the measurement of sedimentation coefficient-resolved, spectrally corrected photoluminescence (PL) spectra of dispersed nanoparticles with exceptional precision. WE calibrated and validated the MWE-AUC PL measurements using certified fluorescence standards, ensuring the accuracy of the results. By analyzing the size-dependent PL spectra obtained from a single MWE-AUC experiment, we compared these findings with single-particle spectroscopic studies, which provided insights into the PL spectra, decay kinetics, and blinking behavior of individual g-QDs. This study underscores the significant potential of MWE-AUC with in-line optical detection as a comprehensive platform for the holistic characterization of complex-structured fluorescent colloids.