Development of ultramicroelectrodes and nanoelectrodes opened interesting possibilities in the investigation electron transfer phenomena, including their application as probe electrodes in scanning electrochemical microscopy (SECM). Analytical prowess of SECM was often shadowed by long operation times required for analysis of a wide sample area. In this report, we developed a multi-channel nanoelectrode bundle for simultaneous electroanalysis of multiple orthogonal redox reactions in one bath. Four nanoelectrodes of diameters 100–400 nm were shown to be bundled in a 2 μm disk area. The nanoelectrode assembly was implemented as a tip electrode for multi-channel SECM, dramatically improving the time efficiency of SECM operations. The nanoelectrode bundle was also demonstrated as a stand-alone microprobe for electroanalytical investigations in small volumes such as ceramic confinements and biologically important compartments. The development reported in this work should benefit electrochemical analyses of various systems, especially those involving SECM and fine spatial control.
|Journal||Analytica Chimica Acta|
|Publication status||Published - 2022 Sept 15|
Bibliographical noteFunding Information:
This work was financially supported by Samsung Advanced Institute of Technology and the Basic Science Research Program through the National Research Foundation (NRF) of Korea ( NRF-2020R1C1C1007409 , NRF2020R1A4A1017737 ). Partial financial support was provided by the Ministry of Science and ICT (Project Number: ERIC06-4 ) and Commercialization Promotion Agency for R&D Outcomes (COMPA) .
© 2022 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Environmental Chemistry