Facile Fabrication of MoSe2 on Paper as an Electromechanical Piezoresistive Pressure–Strain Sensor

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Abstract
Over the last decade, the rapid development in health care industry and security have driven innovations in the field of wearable electronics and smart sensors. This report demonstrates the fabrication of Molybdenum diselenide (MoSe2) by a facile, low-cost and scalable hydrothermal synthesis method followed by a vacuum filter deposition on cellulose paper. The fabricated device is utilized as a pressure and strain sensor. Fabricated device is passivated using polydimethylsiloxane (PDMS) and also PDMS film enhances flexibility of the device. The calculated sensitivity of pressure sensor is ~ 0.3 kPa-1, which is comparable and relatively better than the pressure sensor fabricated using sophisticated techniques. Further, the device exhibited significant of merit for strain sensing with a gauge factor of ~ 6.84. Fabricated device showed excellent resilience in 500 cycle bending tests which promises the robustness of the device. As an application, the fabricated sensor is used to develop a wireless keyboard by integrating the sensor on fingertips of an individual and a real-time human motion monitoring application wherein the data is transmitted wirelessly to a smartphone with a dedicated android application. The successful fabrication of MoSe2/paper based cost-effective, flexible, and biodegradable pressure-strain sensor shows tremendous applications in future intelligent user interface systems, human security and personal health care monitoring.
Funding Information
  • Portion thereof was performed using facilities at CeNSE
  • Indian Institute of Science Bengaluru
  • Ministry of Human Resource Development
  • Ministry of electronics and information technology MeitY and Nanomission
  • Department of Science and Technology DST
  • Govt. of India

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