DocumentCode :
786067
Title :
Charge-based chemical sensors: a neuromorphic approach with chemoreceptive neuron MOS (CνMOS) transistors
Author :
Shen, Nick Yu-Min ; Liu, Zengtao ; Lee, Chungho ; Minch, Bradley A. ; Kan, Edwin Chih-Chuan
Author_Institution :
Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA
Volume :
50
Issue :
10
fYear :
2003
Firstpage :
2171
Lastpage :
2178
Abstract :
A novel chemoreceptive neuron MOS (CνMOS) transistor with an extended floating-gate structure has been designed with several individual features that significantly facilitate system integration of chemical sensing. We have fabricated CνMOS transistors with generic molecular receptive areas and have characterized them with various fluids. We use an insulating polymer layer to provide physical and electrical isolation for sample fluid delivery. Experimental results from these devices have demonstrated both high sensitivity via current differentiation and large dynamic range from threshold voltage shifts in sensing both polar and electrolytic liquids. We have established electrochemical models for both steady-state and transient analyses. Our preliminary measurement results have confirmed the basic design and operations of these devices, which show potential for developing silicon olfactory and gustatory units that are fully compatible with current CMOS technology.
Keywords :
CMOS integrated circuits; chemical sensors; chemioception; microsensors; neural chips; transient analysis; CνMOS; charge-based chemical sensors; chemoreceptive neuron MOS; current differentiation; dynamic range; electrical isolation; electrochemical models; extended floating-gate structure; fluid delivery; generic molecular receptive areas; gustatory units; insulating polymer layer; neuromorphic approach; olfactory units; physical isolation; sensitivity; steady-state analyses; system integration; threshold voltage shifts; transient analyses; CMOS technology; Chemical sensors; Dielectrics and electrical insulation; Dynamic range; MOSFETs; Neuromorphics; Neurons; Plastic insulation; Polymers; Threshold voltage;
fLanguage :
English
Journal_Title :
Electron Devices, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9383
Type :
jour
DOI :
10.1109/TED.2003.816905
Filename :
1232939
Link To Document :
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