• DOI:10.1038/s41699-018-0064-4
• Corpus ID: 53074615

Imperceptible electrooculography graphene sensor system for human–robot interface

@article{Ameri2018ImperceptibleEG,
  title={Imperceptible electrooculography graphene sensor system for human–robot interface},
  author={Shideh K. Ameri and Myungsoo Kim and Irene Kuang and W. K. Perera and Mohammed Alshiekh and Hyoyoung Jeong and Ufuk Topcu and Deji Akinwande and Nanshu Lu},
  journal={npj 2D Materials and Applications},
  year={2018},
  volume={2},
  pages={1-7}
}

• S. K. Ameri, Myungsoo Kim, +6 authors N. Lu
• Published 24 July 2018
• Computer Science
• npj 2D Materials and Applications

Electrooculography (EOG) is a method to record the electrical potential between the cornea and the retina of human eyes. Despite many applications of EOG in both research and medical diagnosis for many decades, state-of-the-art EOG sensors are still bulky, stiff, and uncomfortable to wear. Since EOG has to be measured around the eye, a prominent area for appearance with delicate skin, mechanically and optically imperceptible EOG sensors are highly desirable. Here, we report an imperceptible EOG sensor system based on noninvasive graphene electronic tattoos (GET), which are ultrathin, ultrasoft, transparent, and breathable. The GET EOG sensors can be easily laminated around the eyes without using any adhesives and they impose no constraint on blinking or facial expressions. High-precision EOG with an angular resolution of 4° of eye movement can be recorded by the GET EOG and eye movement can be accurately interpreted. Imperceptible GET EOG sensors have been successfully applied for human–robot interface (HRI). To demonstrate the functionality of GET EOG sensors for HRI, we connected GET EOG sensors to a wireless transmitter attached to the collar such that we can use eyeball movements to wirelessly control a quadcopter in real time.Sensors: graphene electronic tattoos enable electrooculographyNon-invasive graphene-based sensors can be laminated around the eyes to perform electrooculography and can be used as human–robot interfaces. A team led by Shideh Kabiri Ameri and supervised by Nanshu Lu and Deji Akinwande at University of Texas at Austin devised graphene electronic tattoos with 350 nm thickness, 85% optical transparency, and up to 50% stretchability, which can be seamlessly applied onto human skin without using any adhesives. These conformal sensors are capable of detecting eye movement with a resolution of about 4 degrees, and can thus be used for electrooculographic purposes. Connecting them to a commercially available board capable of data acquisition and wireless communication allows demonstrating real-time control of a wireless quadcopter through eye movements. This versatile platform can be extended to other two-dimensional materials for advances multimodal sensing.