Carbon-ring electrodes with 1-.mu.m tip diameter - Analytical

Kirstin C. Morton , Celeste A. Morris , Maksymilian A. Derylo , Rahul Thakar , and Lane A. Baker. Analytical ... Deon T. Miles, Andrew Knedlik, and Da...
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Anal. Chem. 1088, 58, 1782-1786

1782

(34) !-lowell, J. 0.; Wightman, R. M. J . Phys. Chem. lS84, 88, 39 15-39 18. (35) Schuette. S. A.; McCreery. R. L. J . €/ecfroam/. Chem. 1985, 191, 339-343 .-. (36) Jolly, W. J. me S Y n w i s and c h m c t e r / z a t b of I m @ n i c cornpounds; Prentice Hall: Englewood Cliffs, NJ, 1970 p 486. (37) Adams, R. N. Electrochemistry at SOM ~kctrodes;Marcel Dekker: New York, 1969.

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(38) Van Dyke, M. An Album of Fluid Motion; Parabolic: Stanford, 1982; pp 20, 28-3 1.

RECEIVED for review January 21, 1986. Accepted March 25, 1986. This work was supported by the Chemical Analysis division of the National Science Foundation.

Carbon-Ring Electrodes with 1-pm Tip Diameter Yeon-Taik Kim, Donald M. Scarnulis, and Andrew G. Ewing*

Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802

The~fsklcatknduttrrrsmallrkrgrhrrped~ wlth Up dlameters as small as 1 pm b reported. These electrodes are formed by pyrolysis of methane inside of hot quartz The tip bfllbd with epoxy and cleaved to expose a rlngahaped carbon M r o d e . The small total dlmenslon of these electrodes should make them unique for voltammetric meaclurements in ultrasmall environments. Voltammograms obtained at these electrodes are slgmoldal at low scan rates (