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Updated: Jul 11, 2026
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Photodeposition of Pd onto Colloidal Au Nanorods by Surface Plasmon Excitation
Published on: August 15, 2019
Electrochemically deposited palladium as a substrate for self-assembled monolayers.
Tesfaye Refera Soreta1, Jorg Strutwolf, Ciara K O'Sullivan
1Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Països Catalans, 26, 43007, Tarragona, Spain.
Langmuir : the ACS Journal of Surfaces and Colloids
|September 14, 2007
Summary
This study demonstrates electrochemical deposition of palladium (Pd) on glassy carbon for self-assembled monolayers (SAMs). Optimized Pd deposition controls surface morphology and enhances SAM formation for biosensing applications.
Area of Science:
- Electrochemistry
- Materials Science
- Surface Chemistry
Background:
- Gold is the predominant metal for self-assembled monolayers (SAMs), but alternatives like palladium offer unique advantages.
- Exploring alternative metal substrates is crucial for advancing SAM-based technologies.
Purpose of the Study:
- To develop an electrochemical method for depositing palladium (Pd) onto glassy carbon electrodes.
- To characterize the morphology and surface properties of the electrodeposited Pd.
- To evaluate the ability of the Pd surface to support alkanethiol self-assembled monolayers (SAMs).
Main Methods:
- Electrochemical deposition of palladium from PdCl2 solutions.
- Optimization of deposition parameters (electrolyte, pH, electrochemistry).
- Surface characterization using scanning electron microscopy (SEM) and chronocoulometry.
- Formation and evaluation of alkanethiol SAMs on Pd surfaces.
Main Results:
- Optimized electrochemical deposition conditions were established for Pd on glassy carbon.
- SEM and chronocoulometry confirmed controllable Pd surface morphology and roughness.
- Alkanethiol SAMs effectively formed on the Pd substrate, indicated by suppressed Faradaic processes.
- A consistent understanding of Pd surface properties was achieved through combined SEM and SAM analysis.
Conclusions:
- Electrochemical deposition offers precise control over palladium surface morphology and its capacity to support SAMs.
- This method provides a versatile platform for creating tailored metal surfaces for advanced applications.
- The findings pave the way for developing mixed metal monolayers and subsequent mixed SAMs for biosensing.
