Diffusive−Convective Transport into a Porous Membrane. A Comparison of Theory and Experiment Using Scanning Electrochemical Microscopy Operated in Reverse Imaging Mode

2002 ◽  
Vol 74 (17) ◽  
pp. 4577-4582 ◽  
Author(s):  
Olivia D. Uitto ◽  
Henry S. White ◽  
Koichi Aoki
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Porous Membrane ◽  
Convective Transport ◽  
Imaging Mode ◽  
Theory And Experiment ◽  
Electrochemical Microscopy

Scanning electrochemical microscopy of a porous membrane

1991 ◽  
Vol 58 (1) ◽  
pp. 71-87 ◽  
Author(s):  
Erik R. Scott ◽  
Henry S. White ◽  
J. Bradley Phipps
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Porous Membrane ◽  
Electrochemical Microscopy

scholarly journals Submicron probes for scanning electrochemical microscopy

2018 ◽  
Vol 96 (3) ◽  
pp. 328-335 ◽  
Author(s):  
Michelle S.M. Li ◽  
Fraser P. Filice ◽  
Zhifeng Ding
Keyword(s):  
Three Dimensional ◽  
Scanning Electrochemical Microscopy ◽  
Horizontal Line ◽  
Fabrication Method ◽  
Minimal Difference ◽  
Imaging Mode ◽  
Electrode Fabrication ◽  
First Time ◽  
Electrochemical Microscopy ◽  
Probe Approach

To improve the spatial resolutions of scanning electrochemical microscopy (SECM) imaging, the laser-pulled submicron electrode fabrication method was explored in this work. Manual polishing of a laser-pulled Pt nanoelectrode exposed a Pt tip diameter of 250 nm with a ratio of the tip glass to exposed Pt disc (RG) of 30. This fabricated submicron probe was then utilized to study the electrochemical functionality of an independently addressable microband electrodes (IAME) sample using SECM. In the constant imaging mode of SECM, where the probe is scanned linearly across the sample at a fixed z position, SECM demonstrated higher resolution than that of the conventional micrometer electrodes when the feedback currents from the Pt and glass microbands were characterized. In addition, the depth scan imaging mode of SECM was also used to extract experimental horizontal line scans and probe approach curves for analysis. Three-dimensional (3D) simulations of the IAME–SECM probe experiments were explored for the first time to quantify the tip-to-sample distances, tilt angle of the sample (or electrode), and height of the Pt microbands. The experimentally characterized height was found to be similar to manufacturer specification (125 nm vs 110 nm). Furthermore, the more computationally demanding 3D simulation of the true IAME sample geometry (110 nm height of the Pt microbands) revealed minimal difference in feedback behaviours in comparison with the idealized flat geometry. The removal of this simulation complexity was proved to be sufficient for SECM analysis of the IAME sample by a 250 nm Pt probe, which greatly saves computation resources.

Scanning electrochemical microscopy (SECM) studies of catalytic EC′ processes: theory and experiment for feedback, generation/collection and imaging measurements

2011 ◽  
Vol 13 (12) ◽  
pp. 5403 ◽  
Author(s):  
Susan Cannan ◽  
Javier Cervera ◽  
Rebecca J. Steliaros (née Haskins) ◽  
Eleni Bitziou ◽  
Anna L. Whitworth ◽  
...  
Keyword(s):  
Scanning Electrochemical Microscopy ◽  
Theory And Experiment ◽  
Electrochemical Microscopy
Sign in / Sign up

Export Citation Format

Share Document