Next Article in Journal
Enzymatically Functionalized Composite Materials Based on Nanocellulose and Poly(Vinyl Alcohol) Cryogel and Possessing Antimicrobial Activity
Previous Article in Journal
Nanocomposites SnO2/SiO2:SiO2 Impact on the Active Centers and Conductivity Mechanism
Previous Article in Special Issue
Optical Properties, Morphology, and Stability of Iodide-Passivated Lead Sulfide Quantum Dots
Open AccessArticle

Investigation of AgInS2/ZnS Quantum Dots by Magnetic Circular Dichroism Spectroscopy

1
School of Chemistry, Trinity College, University of Dublin, Dublin 2, Dublin, Ireland
2
Center of informational optical technologies ITMO University, St. Petersburg 197101, Russia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(21), 3616; https://doi.org/10.3390/ma12213616
Received: 30 September 2019 / Revised: 31 October 2019 / Accepted: 1 November 2019 / Published: 4 November 2019
Over recent years, quantum dots (QDs) based on ternary metal dichalcogenides have attracted a lot of attention due to their unique properties and a range of potential applications. Here, we review the latest studies on the optical properties of AgInS2/ZnS QDs with emphasis on their theoretical modeling, and present our investigations of electronic transitions invisible in unstructured absorption spectra of AgInS2/ZnS QDs. The analysis of the absorption, photoluminescence excitation (PLE), and magnetic circular dichroism (MCD) spectra of hydrophobic and hydrophilic AgInS2/ZnS QDs of different sizes enables us to determine positions of electron transitions in these QDs. We demonstrate that the use of the second derivative of PLE spectra provides more unequivocal data on the position of the energy transitions compared with the second derivative of absorption spectra. Analysis of the MCD spectra reveals that the magnetic field induces energy level mixing in AgInS2/ZnS QDs in contrast to the traditional Cd-based QDs, where MCD is associated only with removing degeneracy of the excited energy level. View Full-Text
Keywords: ternary quantum dots; magnetic circular dichroism; AgInS2/ZnS; AIS; electronic transitions ternary quantum dots; magnetic circular dichroism; AgInS2/ZnS; AIS; electronic transitions
Show Figures

Figure 1

MDPI and ACS Style

Gromova, Y.; Sokolova, A.; Kurshanov, D.; Korsakov, I.; Osipova, V.; Cherevkov, S.; Dubavik, A.; Maslov, V.; Perova, T.; Gun’ko, Y.; Baranov, A.; Fedorov, A. Investigation of AgInS2/ZnS Quantum Dots by Magnetic Circular Dichroism Spectroscopy. Materials 2019, 12, 3616.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop