An efficient method for fabrication of disk-shaped scanning electrochemical microscopy probes with small glass-sheath thicknesses

作者：Bonazza Horacio L; Fernandez Jose L^*

来源：Journal of Electroanalytical Chemistry, 2010, 650(1): 75-81.

DOI：10.1016/j.jelechem.2010.09.004

• SECM probes
• Disk microelectrodes
• Approach curves
• Platinum tips

This work describes a method for fabrication of disk microelectrodes for scanning electrochemical microscopy (SECM) tips A sharpened platinum wire is sealed Into a borosilicate glass capillary and is thermally projected out of the capillary as a tip The disk microelectrode is obtained by mechanical polishing of the protruding glass-shrouded wire apex What make this method distinctive are the following details (1) The Pt-containing capillary is embedded into a polymer support to carry out a secure polishing of the tip apex once the disk is exposed the polymer is dissolved (2) Disk exposure is revealed by an electrical detection method (3) As no manual sharpening of the glass tip is required very small glass sheath thicknesses can be obtained (R(g) = sheath radius/microelectrode radius <3) The fabrication of tips with radii larger than 0 3 mu m is relatively straightforward (success

• 出版日期2010-12-15