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Structure-property relationships in nanocellulose-based electrochemical sensors
Khadijeh Nekoueian1, Kristoffer Meinander2, Golnoosh Akhlamadi1
1Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, P.O. Box 13500, 00076, Aalto, Finland.
Talanta
|December 9, 2025
Summary
This study developed a novel cellulose-derived electrochemical sensor using nanocellulose and carbon nanotubes. The research explores the link between material properties and sensor performance for sustainable electroanalysis.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing sustainable, eco-friendly electrode materials is crucial for electrochemical sensing, moving away from fossil-based resources.
- Cellulose-based materials present a promising avenue, but their structure-property-performance relationships in electrochemical sensors are not well understood.
- Existing limitations in fossil-based materials necessitate innovative, environmentally benign alternatives for electroanalytical applications.
Purpose of the Study:
- To create a functional, cellulose-derived, carbon-based electrochemical sensor.
- To investigate the physical and chemical properties of the novel sensing platforms.
- To establish the correlation between these properties and electrochemical behavior.
Main Methods:
- Utilized a layer-by-layer assembly technique to integrate polyethyleneimine (PEI)/nanocellulose (NC) architectures with single-walled carbon nanotube (SWCNT) networks.
- Incorporated TEMPO-oxidized cellulose nanofibers (TOCNFs), sulfated cellulose nanofibers (SCNFs), and sulfated cellulose nanocrystals (SCNCs) into the sensor fabrication.
- Examined the physical/chemical properties and electrochemical performance using outer-sphere and inner-sphere redox probes.
Main Results:
- Successfully fabricated a scalable, cellulose-derived electrochemical sensor platform.
- Detailed characterization of SWCNT/PEI/NC sensing platforms provided insights into their physicochemical properties.
- Established correlations between material properties and electrochemical performance, demonstrating the sensor's potential.
Conclusions:
- The developed cellulose-derived sensor offers a sustainable alternative for electrochemical sensing.
- Understanding the structure-property-performance relationships is key for optimizing cellulose-based electrochemical sensors.
- The scalable fabrication process is compatible with industrial applications, paving the way for greener electroanalysis.
Keywords:
Cellulose-based electrochemical sensorsElectrochemistryPhysicochemical characterizationSingle-walled carbon nanotube networksStructure-property relationship
