Conducting polymer-based hybrid assemblies for electrochemical sensing: a materials science perspective

Area of Science:

• Electrochemistry
• Materials Science
• Analytical Chemistry

Background:

• Conducting polymers are crucial in developing advanced electrochemical sensors.
• Hybrid electrocatalysts enhance sensor performance by combining polymer properties with other nanomaterials.
• Amperometric sensing offers sensitive detection of diverse chemical species.

Purpose of the Study:

• To review progress in amperometric sensing using conducting polymer-based hybrid electrocatalysts.
• To summarize synthetic methods and hybrid assembly strategies for sensor design.
• To highlight the materials perspective, including synthetic and electrocatalytic aspects.

Main Methods:

• Incorporation of metal nanoparticles, metal-oxides, semiconductors, and carbon-based nanomaterials.
• Utilizing dopant ions and exploring miscellaneous approaches like photo-amperometric sensing.
• Employing various preparation methods: chemical (one-pot, impregnation), electrochemical (co-deposition), and combined strategies.

Main Results:

• Demonstrated effectiveness of conjugated polymer-based hybrids as robust sensors.
• Successful determination of dissolved gases (O2, NO, NO2), ions (sulfite, nitrite), and molecules (H2O2, AA, DA, UA).
• Comprehensive overview of synthetic routes and their impact on electrocatalytic activity.

Conclusions:

• Conducting polymer-based hybrid electrocatalysts represent a significant advancement in amperometric sensing.
• Diverse synthetic strategies enable tailored design of high-performance sensors.
• This review provides a materials-focused perspective on developing effective electrochemical sensors.