The effects of post-processing on the surface and the optical properties of copper indium sulfide quantum dots

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Akdas T, Distaso M, Kuhri S, Winter B, Birajdar B, Spiecker E, Guldi DM, Peukert W
Zeitschrift: Advances in Colloid and Interface Science
Verlag: Elsevier
Jahr der Veröffentlichung: 2015
Band: 445
Seitenbereich: 337--347
ISSN: 0001-8686


Abstract


In the current contribution we report on investigations regarding the surface of CuInS2 quantum dots and on different strategies to control the amount of surface ligands in a post-processing step. In particular, the reactivity of the organic components, that is, 1-dodecanthiol and 1-octadecene as ligand and solvent, respectively, during nanocrystal formation was studied. A new method to remove residuals from the reaction mixture and to detach excess organics from the surface of the nanocrystals is reported. Our new method, which is based on the utilization of acids, is compared with standard purification procedures by means of thermogravimetric analysis (TGA) with particular focus on its efficiency to remove organics. As a complement, the surface chemistry is analyzed by nuclear magnetic resonance spectroscopy (NMR) to shed light on the nature of the organic components still present after purification. Further analysis of the product by inductively coupled plasma optical emission spectroscopy (ICP-OES) is performed to verify the influence of the new purification method on surface composition and properties. Moreover, steady state and time resolved spectroscopies give insights into excitonic behavior as well as recombination processes. Finally, the new method is optimized for the purification of CuInS2-ZnS nanocrystals, which show enhanced optical properties.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Akdas, Tugce
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Birajdar, Balaji Dr. rer. nat.
Spiecker, Erdmann Prof. Dr.
Sonderforschungsbereich/Transregio 103 Vom Atom zur Turbinenschaufel - wissenschaftliche Grundlagen für eine neue Generation einkristalliner Superlegierungen
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Distaso, Monica Dr.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Guldi, Dirk Michael Prof. Dr.
Lehrstuhl für Physikalische Chemie I
Kuhri, Susanne
Lehrstuhl für Physikalische Chemie I
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Apeleo Zubiri, Benjamin Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


Forschungsbereiche

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Akdas, T., Distaso, M., Kuhri, S., Winter, B., Birajdar, B., Spiecker, E.,... Peukert, W. (2015). The effects of post-processing on the surface and the optical properties of copper indium sulfide quantum dots. Advances in Colloid and Interface Science, 445, 337--347. https://dx.doi.org/10.1016/j.jcis.2015.01.014

MLA:
Akdas, Tugce, et al. "The effects of post-processing on the surface and the optical properties of copper indium sulfide quantum dots." Advances in Colloid and Interface Science 445 (2015): 337--347.

BibTeX: 

Zuletzt aktualisiert 2019-29-05 um 15:35