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

详细信息    查看全文

• 作者：Kristina Tschulik (1)
  Baptiste Haddou (1)
  Dario Omanovi? (2)
  Neil V. Rees (1)
  Richard G. Compton (1)
  
• 关键词：nanoparticle sizing ; Fe3O4 ; anodic particle coulometry ; cathodic particle coulometry ; impact experiments ; metal oxide nanoparticles
• 刊名：Nano Research
• 出版年：2013
• 出版时间：October 2013
• 年：2013
• 卷：6
• 期：11
• 页码：836-841
• 全文大小：
• 作者单位：Kristina Tschulik (1)
  Baptiste Haddou (1)
  Dario Omanovi? (2)
  Neil V. Rees (1)
  Richard G. Compton (1)
  
  1. Department of Chemistry, Physical & Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK
  2. Center for Marine and Environmental Research, Ru?er Bo?kovi? Institute, P. O. Box 180, 10001, Zagreb, Croatia
  
• ISSN：1998-0000

文摘

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.