Graphene Nanosheet Sensors

An Office of Naval Research funded project.

Project title: Smart Socket Prosthesis Sensing Liners for Pressure Ulcer Monitoring and Prevention

Source of support: Office of Naval Research

Graphene has emerged as one of the most impressive materials, harboring both excellent mechanical and electrical properties. The objective of this research is to devise a simple and low-cost fabrication method for assembling graphene-based multifunctional thin films. As a step towards this long-term goal, the initial work focuses on designing and validating the performance of graphene-polymer thin film strain sensors (Fig. 1). The dispersion of graphene was characterized extensively so that solution-based techniques could be employed for film fabrication. Then, the piezoresistivity of these films were validated using tensile-compressive cyclic load tests, and its strain sensitivity, stability, and resolution was optimized. High-performance graphene-based fabric sensors were fabricated and integrated with socket prostheses' liners for realizing next-generation smart socket prostheses.

Collaborators:

  • LIM Innovations (San Francisco, CA)
  • Prof. Wei-Hung Chiang, National Taiwan University of Science and Technology

Fig. 1. Graphene-based solutions were deposited onto substrates to form thin film strain sensors.

(C) Copyright 2018 UC San Diego and Prof. Ken Loh. All rights reserved.