A Green High-k Dielectric from Modified Carboxymethyl Cellulose-Based with Dextrin

Area of Science:

• Materials Science
• Green Chemistry
• Polymer Science

Background:

• Electronic devices rely on non-renewable, toxic materials, causing environmental concerns.
• Sustainable alternatives are crucial for global environmental goals.
• Carboxymethyl cellulose (CMC) is a promising bio-polymer for green material development.

Purpose of the Study:

• To develop and evaluate a biocompatible and biodegradable hydrogel as a high-k dielectric material.
• To explore the potential of CMC-based hydrogels for low-voltage electronic applications.
• To investigate the performance and stability of thin-film CMC-based dielectrics.

Main Methods:

• Fabrication of hydrogels using citric acid, dextrin, and CMC.
• Characterization of mechanical properties (Young's modulus).
• Fabrication and testing of thin-film transistors using CMC-based hydrogel as a dielectric layer.
• Surface modification using poly-(2-vinyl anthracene) (PVAn).

Main Results:

• CMC-based hydrogels exhibit rubber-like properties with a Young's modulus of 0.89 MPa.
• The thin-film hydrogel demonstrated a high dielectric constant (up to 78) and capacitance (2090 nF cm⁻²).
• Transistors showed a low threshold voltage (≈-0.8 V), high ON-OFF ratio (≈10⁵), and stable performance under bias stress.

Conclusions:

• Modified CMC-based hydrogels are suitable green high-k dielectric candidates for low-voltage electronics.
• The developed material offers a biocompatible and biodegradable alternative to conventional dielectrics.
• This research supports the development of sustainable electronic devices.