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

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

doi:10.1039/c4nr02336f

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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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^-1 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

Original language	English
Pages (from-to)	8919-8925
Number of pages	7
Journal	Nanoscale
Volume	6
Issue number	15
DOIs	https://doi.org/10.1039/c4nr02336f
Publication status	Published - 7 Aug 2014

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title = "Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals",

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-1 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",

author = "L. Turyanska and Hill, \{R. J A\} and O Makarovsky and F. Moro and Knott, \{A. N.\} and Larkin, \{Oliver J.\} and A. Patan{\`e} and A Meaney and Christianen, \{P C M\} and Fay, \{M. W.\} and Curry, \{R. J.\}",

year = "2014",

month = aug,

day = "7",

doi = "10.1039/c4nr02336f",

language = "English",

volume = "6",

pages = "8919--8925",

journal = "Nanoscale",

issn = "2040-3364",

publisher = "Royal Society of Chemistry",

number = "15",

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TY - JOUR

T1 - Tuneable paramagnetic susceptibility and exciton g-factor in Mn-doped PbS colloidal nanocrystals

AU - Turyanska, L.

AU - Hill, R. J A

AU - Makarovsky, O

AU - Moro, F.

AU - Knott, A. N.

AU - Larkin, Oliver J.

AU - Patanè, A.

AU - Meaney, A

AU - Christianen, P C M

AU - Fay, M. W.

AU - Curry, R. J.

PY - 2014/8/7

Y1 - 2014/8/7

N2 - 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-1 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

AB - 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-1 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

UR - https://www.scopus.com/pages/publications/84904290164

U2 - 10.1039/c4nr02336f

DO - 10.1039/c4nr02336f

M3 - Article

AN - SCOPUS:84904290164

SN - 2040-3364

VL - 6

SP - 8919

EP - 8925

JO - Nanoscale

JF - Nanoscale

IS - 15

ER -

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

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