CUED Publications database

Wearable Keyboard Using Conducting Polymer Electrodes on Textiles

Takamatsu, S and Lonjaret, T and Ismailova, E and Masuda, A and Itoh, T and Malliaras, GG (2016) Wearable Keyboard Using Conducting Polymer Electrodes on Textiles. Advanced Materials, 28. pp. 4485-4488. ISSN 0935-9648

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A stretchable keyboard based on conducting polymer electrodes patterned on a knitted textile was demonstrated. Electrodes were made of the conducting polymer poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) and coated with polydimethylsiloxane (PDMS), and develop capacitance sensors that respond to touch by a human finger. The relevant mechanical and electrical properties were evaluated and a keyboard that works when worn by a volunteer was also demonstrated. Capacitance sensing was selected as the keyboard's mechanism of operation. A PEDOT:PSS electrode was patterned on the textile using a recently developed technique. PDMS was deposited on a negative master made of polyimide and was transferred on the textile. The conducting polymer was subsequently brush-painted on the textile, and insulated with a layer of PDMS. Touch was detected by changes in the capacitance associated with the PEDOT:PSS/PDMS/counter electrode structure, where the counter electrode is the human finger. The horseshoe-shaped structure of the textile offered a high degree of stretchability (up to 30%), and the keyboard was able to read tactile input from the finger of a volunteer.

Item Type: Article
Depositing User: Cron Job
Date Deposited: 10 Sep 2017 20:11
Last Modified: 22 Oct 2017 20:34