Graphene Based Low Voltage Field Effect Transistor Coupled with Biodegradable Piezoelectric Material Based Dynamic...

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Pressure sensors are crucial for electronic and tactile skin in prosthetics and robotics.
• Existing sensors often lack biodegradability and energy efficiency.
• Growing demand for sustainable and low-power electronic components.

Purpose of the Study:

• To develop a biodegradable dynamic pressure sensor.
• To integrate a piezoelectric material with a graphene field-effect transistor (GFET).
• To achieve low-voltage operation for energy-efficient electronic skin.

Main Methods:

• Fabrication of a metal-insulator-metal (MIM) structure using a biodegradable β-glycine/chitosan composite.
• Integration of the MIM structure with a GFET in an extended gate configuration.
• Testing sensor performance under varying pressure ranges (5-35 kPa) at low voltage (50 mV).

Main Results:

• Achieved sensor sensitivities of 2.70 × 10^-4 kPa^-1 (5-20 kPa) and 7.56 × 10^-4 kPa^-1 (20-35 kPa).
• Demonstrated successful operation at a very low voltage of 50 mV.
• Confirmed the biodegradability of the piezoelectric component.

Conclusions:

• The developed sensor is energy-efficient due to its low operating voltage.
• Biodegradable piezoelectric material reduces electronic waste, aligning with environmental goals.
• The sensor is suitable for energy-efficient, large-area electronic skin applications in prosthetics and robotics.