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.
R. J. A. Hill
A. N. Knott
O. J. Larkin
P. C. M. Christianen
Dr MICHAEL FAY MICHAEL.FAY@NOTTINGHAM.AC.UK
Senior Research Fellow
R. J. Curry
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.
|Journal Article Type||Article|
|Publication Date||Aug 7, 2014|
|Publisher||Royal Society of Chemistry|
|Peer Reviewed||Peer Reviewed|
|APA6 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|
|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|
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
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