期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 25, 页码 7247-7251出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201600853
关键词
analytical methods; electrochemical dissolution; electrochemistry; nanoparticles; surface plasmon resonance
资金
- FP7 EC Project Nanodetector [280478]
The increasing production and application of nanoparticles necessitates a highly sensitive analytical method for the quantification and identification of these potentially hazardous materials. We describe here an application of surface plasmon microscopy for the individual detection of each adsorbed nanoparticle and for visualization of its electrochemical conversion. Whereas the adsorption rate characterizes the number concentration of nanoparticles, the potential at which the adsorbed nanoparticles disappear during an anodic potential sweep characterizes the type of material. All the adsorbed nanoparticles are subjected to the potential sweep simultaneously; nevertheless, each of the up to a million adsorbed nanoparticles is identified individually by its electrochemical dissolution potential. The technique has been tested with silver and copper nanoparticles, but can be extended to many other electrochemically active nanomaterials.
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