Investigation of Magnetic Circular Dichroism Spectra of Semiconductor Quantum Rods and Quantum Dot-in-Rods.

Farrukh Safin,Vladimir Maslov,Ekaterina Kolesova,Yurii K Gun’Ko,Ivan Korsakov,Aliaksei Dubavik,Yulia Gromova,Sergei Cherevkov

doi:10.3390/nano10061059

Farrukh Safin, Vladimir Maslov + Show 6 more

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https://doi.org/10.3390/nano10061059

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Journal: Nanomaterials	Publication Date: May 30, 2020
Citations: 3	License type: CC BY 4.0

Affiliation: ITMO University, Trinity College Dublin

Abstract

Anisotropic quantum nanostructures have attracted a lot of attention due to their unique properties and a range of potential applications. Magnetic circular dichroism (MCD) spectra of semiconductor CdSe/ZnS Quantum Rods and CdSe/CdS Dot-in-Rods have been studied. Positions of four electronic transitions were determined by data fitting. MCD spectra were analyzed in the A and B terms, which characterize the splitting and mixing of states. Effective values of A and B terms were determined for each transition. A relatively high value of the B term is noted, which is most likely associated with the anisotropy of quantum rods.

Highlights

Anisotropic colloidal semiconductor nanocrystals of various shapes have attracted a lot of attention over recent years due to their unique properties and potential applications
For the first time, we present the studies of the electronic transitions in CdSe/ZnS Quantum Rods (QRs) and CdSe/CdS DiRs by Magnetic circular dichroism (MCD) spectroscopy
We used CdSe/ZnS colloidal QRs with a diameter of 5 nm and a length of 35 nm coated with trioctylphosphine oxide (TOPO) synthesized by the hot injection method [19]

Summary

Introduction

Anisotropic colloidal semiconductor nanocrystals of various shapes have attracted a lot of attention over recent years due to their unique properties and potential applications. Quantum Rods (QRs) and Dot-in-Rods (DiRs) nanocrystals engage great interest in many fields of science and technology [1,2,3,4,5,6,7,8,9,10,11,12]. Due to their elongated shape, QRs and DiRs have high anisotropy in contrast to spherical quantum dots (QDs). Unique optical properties together with mechanical stability and biocompatibility make QRs and DiRs good candidates for potential applications in photovoltaics, laser technology, and biomedical applications [10,11,12]

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