Flexible paper based piezo-resistive sensor functionalised by 2D-WSe2 nanosheets. (5th August 2020)

• Record Type: Journal Article
• Authors: Pataniya, Pratik M; Sumesh, C K; Tannarana, Mohit; Zankat, Chetan K; Solanki, G K; Patel, K D; Pathak, V M
• Is Part Of: Nanotechnology. Volume 31:Number 43(2020)
• Publication Date: 2020-08-05
• Subjects: WSe2 nanosheets -- paper-based sensor -- pressure sensor -- liquid phase exfoliation; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aba4cd
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: High-performance electronics demand extremely sensitive piezo-resistive sensors with important features such as low-fabrication cost, easy implementation, low power consumption and high-pressure sensitivity over broad pressure range. Herein, we report a flexible piezo-resistive paper-based device functionalised by WSe2 nanosheets. An efficient and low-cost fabrication strategy using Whatman filter paper and tissue paper is adopted for versatile sensing applications. The WSe2 nanosheets were synthesized by high-yield and size-controlled liquid phase exfoliation technique. The flexible WSe2 nanosheets-paper sensor shows excellent response in broad pressure range of 1 Pa–100 kPa with exceptionally high sensitivity of 29.24 kPa −1, current responsivity of 70 and response time of 100 ms. The pressure sensor is also employed to recognize the pressure generated due to finger tapping. Encouragingly, the piezo-resistive sensors can also sense extremely small pressure differences of about 1.4 Pa generated by water drops.