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

Turyanska, L, Hill, RJA, Makarovsky, O, Moro, F, Knott, AN, Larkin, OJ, Patanè, A, Meaney, A, Christianen, PCM, Fay, MW and Curry, RJ (2014) Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals Nanoscale, 6 (15). pp. 8919-8925.

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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 m 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. This journal is © the Partner Organisations 2014.

Item Type: Article
Authors :
AuthorsEmailORCID
Turyanska, LUNSPECIFIEDUNSPECIFIED
Hill, RJAUNSPECIFIEDUNSPECIFIED
Makarovsky, OUNSPECIFIEDUNSPECIFIED
Moro, FUNSPECIFIEDUNSPECIFIED
Knott, ANUNSPECIFIEDUNSPECIFIED
Larkin, OJUNSPECIFIEDUNSPECIFIED
Patanè, AUNSPECIFIEDUNSPECIFIED
Meaney, AUNSPECIFIEDUNSPECIFIED
Christianen, PCMUNSPECIFIEDUNSPECIFIED
Fay, MWUNSPECIFIEDUNSPECIFIED
Curry, RJUNSPECIFIEDUNSPECIFIED
Date : 7 August 2014
Identification Number : https://doi.org/10.1039/c4nr02336f
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:11
Last Modified : 28 Mar 2017 13:11
URI: http://epubs.surrey.ac.uk/id/eprint/805900

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