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Surface sensing of quantum dots by electron spins

Moro, Fabrizio; Turyanska, Lyudmila; Wilman, James; Williams, Huw E.L.; Fielding, Alistair John; Patan�, Amalia

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Authors

Fabrizio Moro

James Wilman

Huw E.L. Williams

Alistair John Fielding

Amalia Patan�



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 nano-probes and the use of electron spins for surface sensing.

Journal Article Type Article
Acceptance Date Sep 14, 2016
Online Publication Date Sep 14, 2016
Deposit Date Sep 15, 2016
Publicly Available Date Sep 15, 2016
Journal Nano Letters
Print ISSN 1530-6984
Electronic ISSN 1530-6992
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 16
Issue 10
DOI https://doi.org/10.1021/acs.nanolett.6b02727
Public URL https://nottingham-repository.worktribe.com/output/817867
Publisher URL http://dx.doi.org/10.1021/acs.nanolett.6b02727

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