Observing single nanoparticle collisions by electrogenerated chemiluminescence amplification.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 18491945.
- Also identified by DOI 10.1021/nl8009236.
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Abstract
We demonstrate a novel method of observing single particle collision events with electrogenerated chemiluminescence (ECL). A single event is characterized by the enhancement of ECL intensity during the collision of an individual platinum nanoparticle (Pt NP) on an indium tin oxide electrode, which catalyzes the oxidation of Ru(bpy)3(2+) and a coreactant, for example, tri- n-propylamine (TPrA), present in the solution. Every collision produces a unique photon spike whose amplitude and frequency can be correlated with the size and concentration of the Pt NPs. A large amplification of ECL intensity can occur by choosing an appropriate measuring electrode and using high concentrations of Ru(bpy)3(2+) and the coreactant.
Medical subject headings
- Electrochemistry
- Luminescent Measurements
- Materials Testing
- Nanoparticles