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Array Microcell Method (AMCM) for Serial Electroanalysis
Author(s) -
Alden Sasha E.,
Siepser Natasha P.,
Patterson Jacqueline A.,
Jagdale Gargi S.,
Choi Myunghoon,
Baker Lane A.
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201901976
Subject(s) - microelectrode , microcell , multielectrode array , electrode , materials science , electrochemistry , photoresist , pipette , nanotechnology , electrochemical cell , chemistry , computer science , layer (electronics) , operating system
We describe a method for electrochemical measurement and synthesis based on the combination of a mobile micropipette and a microelectrode array, which we term the array microcell method (AMCM). AMCM has the ability to address single electrodes within a microelectrode array (MEA) and provides a simple, low‐cost format to enable versatile electrochemical measurements. In AMCM, a droplet at the tip of a movable micropipette (inner diameter of 50 μm) functions as an electrochemical cell, in which the electrode area is defined by a microelectrode of the array. We also report carbon MEAs that are well suited for AMCM and are fabricated from pyrolyzed photoresist films (PPFs). PPF‐MEAs with nominal electrode diameters of 5.5 μm are characterized by AMCM, standard macroscale electrochemical methods, and finite element modeling. The versatility of AMCM is demonstrated by measurement of single Pt microparticles and by electrodeposition of shape‐controlled Pt nanoparticles.