Scanning electrochemical microscopy: theory and characterization of electrodes of finite conical geometry

Analytical Chemistry
Cynthia G ZoskiAllen J Bard

Abstract

Finite conical electrodes, which are of particular interest as probes for imaging of surfaces using scanning electrochemical microscopy (SECM), in kinetic studies and in probing thin films were investigated. Theoretical SECM tip current-distance feedback (approach) curves for a finite conical electrode were calculated by numerical (finite element) analysis and compared to an earlier approximate model. The SECM curves obtained depended on the ratio of the base radius of the cone to the height of the cone and on the thickness of the insulating sheath. A new approach to fabricating conical tips of Pt in glass is described. These were used to obtain approach curves over both electrically conducting and insulating substrates. Comparison of experimental and simulated SECM approach curves provided a sensitive method of evaluating the size and shape of finite conical electrodes.

References

Feb 5, 2000·Analytical Chemistry·J V Macpherson, P R Unwin
Sep 6, 2001·Analytical Chemistry·R G Maus, R M Wightman
May 30, 2002·Analytical Chemistry·Peter LiljerothKyösti Kontturi
May 30, 2002·Analytical Chemistry·Cynthia G Zoski, Michael V Mirkin

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Citations

Jun 25, 2014·Analytical Chemistry·Xinyu ZhuYuanhua Shao
Jun 27, 2006·Biosensors & Bioelectronics·Allen J BardWei Zhan
Feb 9, 2007·Physical Chemistry Chemical Physics : PCCP·Peng SunMichael V Mirkin
Jan 9, 2010·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Christine Lefrou, Renaud Cornut
Sep 24, 2008·Nanotechnology·Patrick L T M FrederixAndreas Engel
May 17, 2017·Chemical Science·Yi-Lun YingYi-Tao Long
Feb 1, 2018·Chemical Communications : Chem Comm·Tianhan KaiAllen J Bard
Sep 20, 2016·Journal of the Electrochemical Society·Ran ChenShigeru Amemiya
May 22, 2010·Analytical Chemistry·Frédérique DeissFrédéric Kanoufi
Apr 16, 2019·Analytical Chemistry·Fan WuSteffi Krause
Apr 30, 2005·Analytical Chemistry·Biao LiuAllen J Bard

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