Abstract
Micrometer-sized platinized carbon electrodes have previously been used for the detection of reactive oxygen and nitrogen species (ROS and RNS) in biological systems. Here, we report the preparation and characterization of quartz-sealed platinized carbon nanoelectrodes. Such electrodes can be employed as tips in the scanning electrochemical microscope (SECM). The prepared electrodes were characterized by steady-state voltammetry, scanning electron microscopy, and SECM. In addition to ROS/RNS detection, the high surface area of a platinized nanoelectrode makes it a useful potentiometric probe. Unlike previously fabricated platinized electrodes, carbon electrodes possess a very thin insulating sheath, which is essential for experiments inside biological cells and high-resolution SECM imaging.
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Acknowledgments
The support of this work by the National Science Foundation (CHE-1026582) and the Donors of the Petroleum Research Fund administrated by the American Chemical Society is gratefully acknowledged. Carbon electrode development was supported by a Single Cell Science, Engineering and Medicine grant from Drexel University.
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This research is dedicated to Professor Allen J. Bard on the occasion of his 80th birthday.
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Hu, K., Gao, Y., Wang, Y. et al. Platinized carbon nanoelectrodes as potentiometric and amperometric SECM probes. J Solid State Electrochem 17, 2971–2977 (2013). https://doi.org/10.1007/s10008-013-2173-5
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DOI: https://doi.org/10.1007/s10008-013-2173-5