Skip to main content

Research Repository

See what's under the surface

Advanced Search

Surface sensing of quantum dots by electron spins

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

Authors

Fabrizio Moro

Lyudmila Turyanska

James Wilman

Huw E.L. Williams

Alistair John Fielding

Amalia Patanè



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
Journal Nano Letters
Print ISSN 1530-6984
Electronic ISSN 1530-6992
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 16
Issue 10
APA6 Citation Moro, F., Turyanska, L., Wilman, J., Williams, H. E., Fielding, A. J., & Patanè, A. (in press). Surface sensing of quantum dots by electron spins. Nano Letters, 16(10), doi:10.1021/acs.nanolett.6b02727
DOI https://doi.org/10.1021/acs.nanolett.6b02727
Publisher URL http://dx.doi.org/10.1021/acs.nanolett.6b02727
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

Files

acs.nanolett.pdf (1.8 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





You might also like



Downloadable Citations

;