Quantitative evaluation of size selective precipitation of Mn-doped ZnS quantum dots by size distributions calculated from UV/Vis absorbance spectra
Segets D, Komada S, Butz B, Spiecker E, Mori Y, Peukert W (2013)
Publication Type: Journal article
Publication year: 2013
Journal
Publisher: Springer Verlag (Germany)
Book Volume: 15
Pages Range: 1486
Volume: 15
Issue: 4
Journal Issue: 4
DOI: 10.1007/s11051-013-1486-8
Abstract
We demonstrate the quantitative evaluation of the sharp classification of manganese-doped zinc sulfide (ZnS:Mn) quantum dots by size selective precipitation. The particles were characterized by the direct conversion of absorbance spectra to particle size distributions (PSDs) and high-resolution transmission electron micrographs (HRTEM). Gradual addition of a poor solvent (2-propanol) to the aqueous colloid led to the flocculation of larger particles. Though the starting suspension after synthesis had an already narrow PSD between 1.5 and 3.2 nm, different particle size fractions were subsequently isolated by the careful adjustment of the good solvent/poor solvent ratio. Moreover, due to the fact that for the analysis of the classification results the size distributions were available, an in-depth understanding of the quality of the distinct classification steps could be achieved. From the PSDs of the feed, as well as the coarse and the fine fractions with their corresponding yields determined after each classification step, an optimum after the first addition of poor solvent was identified with a maximal separation sharpness κ as high as 0.75. Only by the quantitative evaluation of classification results leading to an in-depth understanding of the relevant driving forces, a future transfer of this lab scale post-processing to larger quantities will be possible.
Authors with CRIS profile
Doris Segets
Lehrstuhl für Partikelsynthese (LFG)
Benjamin Butz
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Erdmann Spiecker
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Wolfgang Peukert
Lehrstuhl für Partikelsynthese (LFG)
Additional Organisation(s)
Exzellenz-Cluster Engineering of Advanced Materials (EAM)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Involved external institutions
Japan (JP)How to cite
APA:
Segets, D., Komada, S., Butz, B., Spiecker, E., Mori, Y., & Peukert, W. (2013). Quantitative evaluation of size selective precipitation of Mn-doped ZnS quantum dots by size distributions calculated from UV/Vis absorbance spectra. Journal of Nanoparticle Research, 15(4), 1486. https://doi.org/10.1007/s11051-013-1486-8
MLA:
Segets, Doris, et al. "Quantitative evaluation of size selective precipitation of Mn-doped ZnS quantum dots by size distributions calculated from UV/Vis absorbance spectra." Journal of Nanoparticle Research 15.4 (2013): 1486.
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