Stretchable graphene thermistor with tunable thermal index

Area of Science:

• Materials Science
• Nanotechnology
• Electronics

Background:

• Conventional thermistors are typically rigid and lack adaptability for dynamic applications.
• The integration of flexible electronics necessitates novel temperature sensing components with enhanced mechanical properties.

Purpose of the Study:

• To fabricate intrinsically stretchable graphene thermistors.
• To investigate the temperature sensing performance of these devices under varying strain conditions.
• To explore the potential of strain-tunable thermal indices for adaptive electronic applications.

Main Methods:

• Fabrication of stretchable thermistors using a lithographic filtration method.
• Utilizing three-dimensional crumpled graphene as thermal detection channels.
• Employing silver nanowires as electrodes, fully embedded within an elastomer matrix.
• Characterization of temperature sensing properties at strains up to 50%.

Main Results:

• The fabricated graphene thermistors exhibit intrinsic high stretchability.
• Devices maintain functionality and temperature sensing capabilities even at high strain levels (up to 50%).
• Demonstrated strain-dependent thermal indices, allowing for tunable sensitivity.
• Sensitivity of the thermistors can be effectively modulated by applied strain.

Conclusions:

• Stretchable graphene thermistors can be successfully fabricated with excellent mechanical robustness.
• The strain-tunable thermal index offers significant advantages over traditional rigid thermistors.
• These devices are well-suited for diverse and adaptive applications in wearable electronics and beyond.