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Stochastic frequency signature for chemical sensing using noninvasive neuronelectronic interface

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4 Author(s)
Mo Yang ; Dept. of Mech. Eng., Univ. of California, Riverside, CA, USA ; Xuan Zhang ; Yu Zhang ; Ozkan, Cengiz S.

The detection of chemical agents is important in many areas including environmental pollutants, toxins, biological and chemical pollutants. As "smart" cells, with strong information encoding ability, neurons can be treated as independent sensing elements. A hybrid circuit of a semiconductor chip with dissociated neurons formed both sensors and transducers. Stochastic frequency spectrum was used to differentiate a mixture of chemical agents with effect on the opening of different ion channels. The frequency of spike trains revealed the concentration of the chemical agent, where the characteristic tuning curve revealed the identity. "Fatigue" experiment was performed to explore the "refreshing" ability and "memory" effect of neurons by cyclic and cascaded sensing. "Neuronelectronic noses" such as this should have wide potential applications, most notably in environmental and medical monitoring.

Published in:

Biomedical Engineering, IEEE Transactions on  (Volume:52 ,  Issue: 5 )

Date of Publication:

May 2005

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