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Enhancement of Paramagnetic Relaxation by Photoexcited Gold Nanorods. Sci Rep 2016 Apr 13;6:24101

Date

04/14/2016

Pubmed ID

27071507

Pubmed Central ID

PMC4829829

DOI

10.1038/srep24101

Abstract

Electron spin resonance (ESR) spectroscopy was used to investigate the switchable, light-dependent effects of gold nanorods (GNRs) on paramagnetic properties of nitroxide spin probes. The photoexcited GNRs enhanced the spin-spin and spin-lattice relaxations of nitroxide spin probes. It was shown that molecular oxygen plays the key role in this process. Our results demonstrate that ESR is a powerful tool for investigating the events following photoexcitation of GNRs. The novel light-controlled effects observed for GNRs on paramagnetic properties and activities of surrounding molecules have a number of significant applications where oxygen sensing and oxygen activity is important.

Author List

Wen T, Wamer WG, Subczynski WK, Hou S, Wu X, Yin JJ

Author

Witold K. Subczynski PhD Professor in the Biophysics department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Electron Spin Resonance Spectroscopy
Gold
Light
Metal Nanoparticles
Nanotubes
Oxygen