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Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals

Turyanska, L.; Hill, R. J. A.; Makarovsky, Oleg; Moro, F.; Knott, A. N.; Larkin, O. J.; Patanè, Amalia; Meaney, A.; Christianen, P. C. M.; Fay, M. W.; Curry, R. J.

Authors

F. Moro

A. N. Knott

O. J. Larkin

A. Meaney

P. C. M. Christianen

R. J. Curry



Abstract

We report on PbS colloidal nanocrystals that combine within one structure solubility in physiological solvents with near-infrared photoluminescence, and magnetic and optical properties tuneable by the controlled incorporation of magnetic impurities (Mn). We use high magnetic fields (B up to 30 T) to measure the magnetization of the nanocrystals in liquid and the strength of the sp-d exchange interaction between the exciton and the Mn-ions. With increasing Mn-content from 0.1% to 7%, the mass magnetic susceptibility increases at a rate of ~ 10-7 m3/kg per Mn percentage; correspondingly, the exciton g-factor decreases from 0.47 to 0.10. The controlled modification of the paramagnetism, fluorescence and exciton g-factor of the nanocrystals is relevant to the implementation of these paramagnetic semiconductor nanocrystals in quantum technologies ranging from quantum information to magnetic resonance imaging.

Citation

Turyanska, L., Hill, R. J. A., Makarovsky, O., Moro, F., Knott, A. N., Larkin, O. J., …Curry, R. J. (2014). Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals. Nanoscale, 6(15), 8919-8925. https://doi.org/10.1039/c4nr02336f

Journal Article Type Article
Acceptance Date Jun 12, 2014
Online Publication Date Jun 13, 2014
Publication Date Aug 7, 2014
Deposit Date Apr 21, 2017
Publicly Available Date Apr 21, 2017
Journal Nanoscale
Print ISSN 2040-3364
Electronic ISSN 2040-3372
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 6
Issue 15
Pages 8919-8925
DOI https://doi.org/10.1039/c4nr02336f
Public URL http://eprints.nottingham.ac.uk/id/eprint/42082
Publisher URL http://pubs.rsc.org/en/Content/ArticleLanding/2014/NR/C4NR02336F#!divAbstract
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
Additional Information : This document is CrossCheck deposited; : Supplementary Information; : The Royal Society of Chemistry has an exclusive publication licence for this journal; OPEN ACCESS: This article is freely available. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (CC BY 3.0); : Received 30 April 2014; Accepted 12 June 2014; Accepted Manuscript published 13 June 2014; Advance Article published 26 June 2014; Version of Record published 10 July 2014

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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