The work reported within this article demonstrates how ESR spectroscopy provides considerable information on the properties of the monolayer that are difficult to obtain with more common techniques. It is expected that this technique will significantly improve the ability to study monolayer-protected nanoparticles in greater detail.AbstractElectron spin resonance (ESR) has emerged as a powerful spectroscopic technique to study theproperties of metal nanoparticles (NPs) protected by a self-assembled monolayer (SAM) of organicmolecules. This technique has been employed to explore the capacity of homoligand monolayers tobind to a hydrophobic probe or to ‘‘sense’’ the hydrophobicity of mixed-ligand monolayers. Moreover,spin labels anchored to the metal surface enable the investigation of the dynamic of the ligands thatform the monolayer. Here we review these applications with the aim of unravelling the many featuresof monolayer-protected metal NPs.The article is published online within the Royal Society of Chemistry journal, Nanoscale and is free to access.
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