Document Detail

All-optical sensing of a single-molecule electron spin.
MedLine Citation:
PMID:  25333198     Owner:  NLM     Status:  Publisher    
We demonstrate an all-optical method for magnetic sensing of individual molecules in ambient conditions at room temperature. Our approach is based on shallow nitrogen-vacancy (NV) centers near the surface of a diamond crystal, which we use to detect single paramagnetic molecules covalently attached to the diamond surface. The manipulation and readout of the NV centers is all-optical and provides a sensitive probe of the magnetic field fluctuations stemming from the dynamics of the electronic spins of the attached molecules. As a specific example, we demonstrate detection of a single paramagnetic molecule containing a gadolinium (Gd$^{3+}$) ion. We confirm single-molecule resolution using optical fluorescence and atomic force microscopy to co-localize one NV center and one Gd$^{3+}$-containing molecule. Possible applications include nanoscale and \textit{in vivo} magnetic spectroscopy and imaging of individual molecules.
Alex Sushkov; Nick Chisholm; Igor Lovchinsky; Minako Kubo; Pik Kwan Lo; Steven Bennett; David Hunger; Aleksei Akimov; Ronald Walsworth; Hongkun Park; Mikhail D Lukin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-21
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-21     Completed Date:  -     Revised Date:  2014-10-22    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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