Energy autonomous flexible and transparent tactile skin

García Núñez, C. , Navaraj, W. T., Polat, E. O. and Dahiya, R. (2017) Energy autonomous flexible and transparent tactile skin. Advanced Functional Materials, 27(18), 1606287. (doi: 10.1002/adfm.201606287)

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Tactile or electronic skin is needed to provide critical haptic perception to robots and amputees, as well as in wearable electronics for health monitoring and wellness applications. Energy autonomy of skin is a critical feature that would enable better portability and longer operation times. This study shows a novel structure, consisting of a transparent tactile sensitive layer based on single-layer graphene, and a photovoltaic cell underneath as a building block for energy-autonomous, flexible, and tactile skin. Transparency of the touch sensitive layer is considered a key feature to allow the photovoltaic cell to effectively harvest light. Moreover, ultralow power consumed by the sensitive layer (20 nW cm−2) further reduces the photovoltaic area required to drive the tactile skin. In addition to its energy autonomy, the fabricated skin is sensitive to touch, mainly because a transparent polymeric protective layer, spin-coated on the sensor's active area, makes the coplanar capacitor sensitive to touch, detecting minimum pressures of 0.11 kPa with a uniform sensitivity of 4.3 Pa−1 along a broad pressure range. Finally, the tactile skin patches are integrated on a prosthetic hand, and the responses of the sensors for static and dynamic stimuli are evaluated by performing tasks, ranging from simple touching to grabbing of soft objects.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dahiya, Professor Ravinder and Polat, Dr Emre Ozan and Garcia Nunez, Dr Carlos and Navaraj, Mr William
Authors: García Núñez, C., Navaraj, W. T., Polat, E. O., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Advanced Functional Materials
ISSN (Online):1616-3028
Published Online:22 March 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Advanced Functional Materials 27(18): 1606287
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
663861Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering & Physical Sciences Research Council (EPSRC)EP/M002527/1ENG - ENGINEERING ELECTRONICS & NANO ENG
659051Flexible Electronics Device Modelling (FLEXELDEMO)Ravinder DahiyaEngineering & Physical Sciences Research Council (EPSRC)EP/M002519/1ENG - ENGINEERING ELECTRONICS & NANO ENG