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Electric-Field Sensor Based on Multilayer-MoS₂/Multilayer-Graphene Heterostructure with Built-In Tensile Strain.

Jiali Hu¹, Mohammad Razzakul Islam¹, Afsal Kareekunnan¹

¹School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa 923-1292, Japan.

ACS Applied Materials & Interfaces

|June 29, 2026

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A novel multilayer MoS2/multilayer graphene sensor demonstrates highly sensitive electric field detection. This strain-engineered device offers improved carrier mobility and a minimum detectable electric field of ~100 V/m for applications like lightning detection.

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Developing highly sensitive electric field (E-field) sensors is crucial for various applications, including atmospheric monitoring.
Traditional sensors often face limitations in sensitivity and performance.

Purpose of the Study:

To report a novel E-field sensor based on a multilayer MoS2/multilayer graphene (ML-MoS2/MLG) heterostructure.
To investigate the impact of built-in tensile strain on sensor performance.

Main Methods:

Fabrication of an ML-MoS2/MLG heterostructure device with unique geometry inducing tensile strain.
Characterization of carrier mobility and E-field sensing performance.
Analysis of field-induced carrier transfer and its effect on drain current.

Keywords:

MoS2 MoS2/graphene heterostructure charge transfer strain engineering, electric field sensing

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Main Results:

Achieved average carrier mobility of 75.7 cm^2 V^-1 s^-1, significantly higher than conventional MoS2 devices.
Demonstrated polarity-dependent drain current variations in response to external E-fields.
Exhibited superior E-field sensing performance with sensitivity ~3x higher than metal-contacted MoS2 devices.
Attained a minimum detectable E-field of approximately 100 V/m.

Conclusions:

The strain-engineered ML-MoS2/MLG heterostructure enables highly sensitive E-field sensing.
Enhanced charge injection and carrier mobility contribute to superior device performance.
The sensor shows significant potential for atmospheric E-field monitoring and lightning detection.