The nanoscale design of quantum dots (QDs) requires advanced analytical techniques. However, those that are commonly used do not have sufficient sensitivity or spatial resolution. Here, we use magnetic resonance techniques combined with paramagnetic Mn impurities in PbS QDs for sensitive probing of the QD surface and environment. In particular, we reveal inequivalent proton spin relaxations of the capping ligands and solvent molecules, strengths and anisotropies of the Mn nuclear spin interactions, and Mn nuclei distances with ∼1 Å sensitivity. These findings demonstrate the potential of magnetically doped QDs as sensitive magnetic nanoprobes and the use of electron spins for surface sensing.

Moro, F., Turyanska, L., Wilman, J., Williams, H., Fielding, A., Patanè, A. (2016). Surface Sensing of Quantum Dots by Electron Spins. NANO LETTERS, 16(10), 6343-6348 [10.1021/acs.nanolett.6b02727].

Surface Sensing of Quantum Dots by Electron Spins

Moro, F
;
2016

Abstract

The nanoscale design of quantum dots (QDs) requires advanced analytical techniques. However, those that are commonly used do not have sufficient sensitivity or spatial resolution. Here, we use magnetic resonance techniques combined with paramagnetic Mn impurities in PbS QDs for sensitive probing of the QD surface and environment. In particular, we reveal inequivalent proton spin relaxations of the capping ligands and solvent molecules, strengths and anisotropies of the Mn nuclear spin interactions, and Mn nuclei distances with ∼1 Å sensitivity. These findings demonstrate the potential of magnetically doped QDs as sensitive magnetic nanoprobes and the use of electron spins for surface sensing.
Articolo in rivista - Articolo scientifico
Colloidal quantum dots; electron spin echo envelope modulation (ESEEM); electron spin resonance (ESR); electron-nuclear double resonance (ENDOR); magnetic doping; nuclear magnetic resonance (NMR);
English
2016
16
10
6343
6348
open
Moro, F., Turyanska, L., Wilman, J., Williams, H., Fielding, A., Patanè, A. (2016). Surface Sensing of Quantum Dots by Electron Spins. NANO LETTERS, 16(10), 6343-6348 [10.1021/acs.nanolett.6b02727].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/210591
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