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Surface Sensing of Quantum Dots by Electron Spins

Moro, F, Turyanska, L, Wilman, J, Williams, HEL, Fielding, AJ and Patanè, A (2016) Surface Sensing of Quantum Dots by Electron Spins. Nano Letters, 16 (10). pp. 6343-6348. ISSN 1530-6984

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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.

Item Type: Article
Uncontrolled Keywords: MD Multidisciplinary
Subjects: R Medicine > RM Therapeutics. Pharmacology
Divisions: Pharmacy & Biomolecular Sciences
Publisher: American Chemical Society
Date Deposited: 14 Feb 2018 12:00
Last Modified: 14 Feb 2018 12:00
DOI or Identification number: 10.1021/acs.nanolett.6b02727
URI: http://researchonline.ljmu.ac.uk/id/eprint/8028

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