79 research outputs found
ENOBIO - First tests of a dry electrophysiology electrode using carbon nanotubes
We describe the development and first tests of Enobio, a dry electrode sensor
concept for biopotential applications. In the proposed electrodes, the tip of
the electrode is covered with a forest of multi-walled CNTs that can be coated
with Ag/AgCl to provide ionic-electronic transduction. The CNT brush-like
structure is to penetrate the outer layers of the skin improving electrical
contact as well as increae the contact surface area. In this paper, we report
the results of the first tests of this concept -- immersion on saline solution
and pig skin signal detection. These indicate performance on a par with state
of the art research-oriented wet electrodes.Comment: Submitted and accepted at the 28th IEEE EMBS International
Conference, New York City, August 31st-September 3rd, 2006. Figures updated
with proper filtering and averagin
First human trials of a dry electrophysiology sensor using a carbon nanotube array interface
Fatigue, sleepiness and disturbed sleep are important factors in health and
safety in modern society and there is considerable interest in developing
technologies for routine monitoring of associated physiological indicators.
Electrophysiology, the measurement of the electrical activity of biological
origin, is a key technique for the measurement of physiological parameters in
several applications, but it has been traditionally difficult to develop
sensors for measurements outside the laboratory or clinic with the required
quality and robustness. In this paper we report the results from first human
experiments using a new electrophysiology sensor called ENOBIO, using carbon
nanotube arrays for penetration of the outer layers of the skin and improved
electrical contact. These tests, which have included traditional protocols for
the analysis of the electrical activity of the brain--spontaneous EEG and
ERP--indicate performance on a par with state of the art research-oriented wet
electrodes, suggesting that the envisioned mechanism--skin penetration--is
responsible. No ill side-effects have been observed six months after the tests,
and the subject did not report any pain or special sensations on application of
the electrode
ENOBIO dry electrophysiology electrode; first human trial plus wireless electrode system
This paper presents the results of the first human trials with the ENOBIO electrophysiology electrode prototype plus the initial results of a new wireless prototype with flexible electrodes based on the same platform. The results indicate that a dry active electrode that employs a CNT array as the electrode interface can perform on a par with traditional "wet" electrodes for the recording of EEG, ECG, EOG and EMG. We also demonstrate a new platform combining wireless technology plus flexible electrodes for improved comfort for applications that take advantage of the dry electrode concept. © 2007 IEEE
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