Printable and Flexible Humidity Sensor Based on Graphene -Oxide-Supported MoTe₂ Nanosheets for Multifunctional...

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Humidity sensors are crucial for environmental monitoring and healthcare.
• Developing flexible and high-performance sensors remains a challenge.

Purpose of the Study:

• To develop a novel, flexible humidity sensor using graphene-oxide (GO)-supported MoTe2 nanosheets.
• To investigate the sensor's performance and structural integrity.

Main Methods:

• Fabrication of GO-MoTe2 hybrid films on PET substrates with inkjet-printed Ag electrodes.
• Testing the capacitive output of sensors under varying humidity levels (11.3-97.3%RH) at room temperature (25 °C).
• Evaluating sensor performance under bending conditions.

Main Results:

• Uniform and tight attachment of MoTe2 to GO nanosheets was confirmed.
• The GO-MoTe2 hybrid film demonstrated superior humidity sensitivity (94.12 pF/%RH).
• The sensor maintained stable output under bending conditions.

Conclusions:

• The GO-MoTe2 hybrid film offers excellent humidity sensing performance.
• This work presents a low-cost method for creating high-performance flexible humidity sensors.
• The developed sensor is suitable for environmental monitoring and healthcare applications.