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Single Particle Detection by Area Amplification: Single Wall Carbon Nanotube Attachment to a Nanoelectrode
- Source :
- Journal of the American Chemical Society. 135:5258-5261
- Publication Year :
- 2013
- Publisher :
- American Chemical Society (ACS), 2013.
-
Abstract
- We describe the electrochemical detection of single nanoparticle (NP) attachment on a nanoelectrode by the increase in the active electrode area. The attachment of gold NP-decorated single wall carbon nanotubes (Au-SWCNTs) was observed by their current-time transients for ferrocenemethanol (FcMeOH) oxidation. Since the attached Au-SWCNT increases the electroactive area available for FcMeOH oxidation, the current increases after attachment of the particle. The "staircase" shape of the current response establishes that the particles do not become deactivated for the outer-sphere electron transfer reaction after attachment. Au-SWCNTs migrate to and are held at the nanoelectrode by an electric field. However, SWCNTs that are not decorated with a gold NP produce only a sharp transient ("blip") response.
- Subjects :
- Nanotubes, Carbon
Surface Properties
Chemistry
Nanoparticle
Nanotechnology
Electrochemical Techniques
General Chemistry
Electrochemical detection
Carbon nanotube
Active electrode
Biochemistry
Catalysis
law.invention
Electron transfer
Colloid and Surface Chemistry
law
Electric field
Particle
Ferrous Compounds
Particle Size
Electrodes
Oxidation-Reduction
Subjects
Details
- ISSN :
- 15205126 and 00027863
- Volume :
- 135
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....820dd7bbe5a6507544fbec2af9c7aade