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.; Patan�, Amalia; Meaney, A.; Christianen, P. C. M.; Fay, M. W.; Curry, R. J.

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: https://nottingham-repository.worktribe.com/output/730775
• Publisher URL: http://pubs.rsc.org/en/Content/ArticleLanding/2014/NR/C4NR02336F#!divAbstract
• 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