Polymer-graphite composite: a versatile use and throw plastic chip electrode

Area of Science:

• Electrochemistry
• Materials Science
• Polymer Science

Background:

• Conventional electrodes can be expensive and fragile.
• There is a need for robust, low-cost electrodes for diverse applications.
• Disposable electrodes offer convenience and reduced contamination risk.

Purpose of the Study:

• To fabricate and characterize an efficient plastic chip electrode (PCE).
• To evaluate the material properties and sustainability of the PCE for off-laboratory use.
• To demonstrate the utility of the PCE in various electrochemical protocols.

Main Methods:

• Fabrication of PCE using graphite and poly(methyl methacrylate) via solution casting.
• Material characterization using Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Thermogravimetric Analysis (TGA), and tensile strength testing.
• Electrochemical performance evaluation using cyclic voltammetry, stripping voltammetry, electropolymerization, electrowinning, and amperometric sensing.

Main Results:

• The PCE exhibited good mechanical stability, bulk conductivity, and high surface area.
• Material characterization confirmed the composite structure and thermal/mechanical properties.
• Electrochemical performance was comparable to conventional glassy carbon electrodes in various protocols.

Conclusions:

• The developed plastic chip electrode is an economically inexpensive, multipurpose, and disposable option.
• Its robust material properties ensure sustainability in harsh, off-laboratory conditions.
• The PCE demonstrates broad applicability in electrochemical sensing and analysis.