Immersion-Controlled Nanoparticle Electrodeposition on a Patterned Pyrolyzed Photoresist Film Electrode for Single-Entity Electrochemistry Studies Using Scanning Electrochemical Cell Microscopy.
- 1Department of Chemistry, Kansas State University, Manhattan, Kansas66506-0401, United States.
- 2Department of Chemistry, Texas A&M University, College Station, Texas77843, United States.
Abstract
We report immersion-controlled electrodeposition as a simple means to fabricate a substrate with defined zones of differently sized nanoparticles and demonstrate its application in scanning electrochemical cell microscopy (SECCM) studies. Defined zones were formed via electrodeposition accompanied by stepwise increases in the immersion depth of a vertically oriented substrate electrode. In this study, the method was demonstrated for the cathodic deposition of platinum nanoparticles (PtNPs) on a pyrolyzed photoresist film (PPF) electrode with a comb-shaped pattern. The sizes and surface immobilization density of PtNPs were measured by scanning electron microscopy, and currents from the hydrogen evolution reaction (HER) in 0.1 M HClO4 were measured in each zone by SECCM. The stepwise deposition via cyclic voltammetry enabled reproducible formation of distinct zones decorated with well-separated PtNPs of controlled sizes (10-50 nm in radius). The resulting PPF substrate was suitable for single-entity SECCM measurements, showing HER current proportional to the number of PtNPs in an SECCM droplet and a correlation between HER activity and PtNP size.
Related
- Forensic electrochemistry on a drop: bromocresol green-modified screen-printed platforms for dual colorimetric-electrochemical detection of scopolamine.
- Biogenic silver nanoparticle coupled MnO₂/MXene hybrid for enhanced electrochemical performance in supercapacitors.
- Scanning Electrochemical Microscopy Analyses of Surfaces Using Ferrocenated Gold Nanoparticle Mediators
- Defocusing-Controlled Morphology and Electrochemical Performance of Laser-Induced Graphene Electrodes for Microsupercapacitors
- Copper electrodeposition localized in picoliter droplets using microcantilever arrays
BibTeX
@article{ito2026immersioncontrolled,
title = {{Immersion-Controlled Nanoparticle Electrodeposition on a Patterned Pyrolyzed Photoresist Film Electrode for Single-Entity Electrochemistry Studies Using Scanning Electrochemical Cell Microscopy.}},
author = {Takashi Ito and Kathleen O Bailey and Josselyn De Leon and Naomi F Harvey and Lingjie Zhang and Lane A Baker},
journal = {Langmuir : the ACS journal of surfaces and colloids},
year = {2026},
month = oct,
doi = {10.1021/acs.langmuir.6c03912},
url = {https://europepmc.org/article/MED/42918153},
note = {CC BY},
}
RIS
TY - JOUR
TI - Immersion-Controlled Nanoparticle Electrodeposition on a Patterned Pyrolyzed Photoresist Film Electrode for Single-Entity Electrochemistry Studies Using Scanning Electrochemical Cell Microscopy.
AU - Takashi Ito
AU - Kathleen O Bailey
AU - Josselyn De Leon
AU - Naomi F Harvey
AU - Lingjie Zhang
AU - Lane A Baker
PY - 2026
DA - 2026/10/01
JO - Langmuir : the ACS journal of surfaces and colloids
DO - 10.1021/acs.langmuir.6c03912
UR - https://europepmc.org/article/MED/42918153
AB - We report immersion-controlled electrodeposition as a simple means to fabricate a substrate with defined zones of differently sized nanoparticles and demonstrate its application in scanning electrochemical cell microscopy (SECCM) studies. Defined zones were formed via electrodeposition accompanied by stepwise increases in the immersion depth of a vertically oriented substrate electrode. In this study, the method was demonstrated for the cathodic deposition of platinum nanoparticles (PtNPs) on a pyrolyzed photoresist film (PPF) electrode with a comb-shaped pattern. The sizes and surface immobilization density of PtNPs were measured by scanning electron microscopy, and currents from the hydrogen evolution reaction (HER) in 0.1 M HClO4 were measured in each zone by SECCM. The stepwise deposition via cyclic voltammetry enabled reproducible formation of distinct zones decorated with well-separated PtNPs of controlled sizes (10-50 nm in radius). The resulting PPF substrate was suitable for single-entity SECCM measurements, showing HER current proportional to the number of PtNPs in an SECCM droplet and a correlation between HER activity and PtNP size.
SN - 0743-7463
SN - 1520-5827
ER -