Article Title

Coulometric sizing of nanoparticles: Cathodic and anodic impact experiments open two independent routes to electrochemical sizing of Fe₃O₄ nanoparticles

Authors

Kristina Tschulik, Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom
Baptiste Haddou, Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom
Dario Omanovi, Center for Marine and Environmental Research, Ruer Bokovi Institute, P. O. Box 180, 10001 Zagreb, Croatia
Neil V. Rees, Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom
Richard G. Compton, Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom

Keywords

nanoparticle sizing, Fe3O4, anodic particle coulometry, cathodic particle coulometry, impact experiments, metal oxide nanoparticles

Abstract

ABSTRACT Anodic particle coulometry (APC) is a recently established method of sizing individual metal nanoparticles by oxidising them during their impact on a micro electrode. Here it is demonstrated that the application of APC can be extended to sizing of metal oxide nanoparticles, such as Fe3O4 magnetite nanoparticles. Additionally, a new route to electrochemical nanoparticle sizing is introduced— cathodic particle coulometry (CPC). This method uses the reduction of impacting nanoparticles, e.g., metal oxide nanoparticles, and is demonstrated to yield correct size information for Fe3O4 nanoparticles. The combination of these two independent electrochemical methods of nanoparticle sizing, allows for purely electrochemical sizing of single nanoparticles and simultaneous verification of the obtained results.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-013-0361-3

Publisher

Tsinghua University Press

Recommended Citation

Kristina Tschulik,Baptiste Haddou,Dario Omanović,Neil V. Rees,Richard G. Compton, Coulometric sizing of nanoparticles: Cathodic and anodic impact experiments open two independent routes to electrochemical sizing of Fe3O4 nanoparticles. NanoRes.2013, 6(11): 836–841