title: Electrical impedance properties of carbon nanotube composite electrodes for chemical and biosensor.
abstract: Electrical impedance properties of different type of carbon nanotubes based bulk electrodes have been investigated to develop chemical and biosensors. The bulk composite electrodes were fabricated with single-wall and multi-wall carbon nanotubes involving ionic conducting host polymer, Nafion, by using traditional solution-casting techniques. Under the various amounts of buffer solution, resistance and capacitance of the electrodes were measured with LCR meter and their characteristics due to ionic conducting host polymer were investigated by means of electrokinetic analysis. The capacitance values showed drastic change while the resistances only changed within few percent ranges. Electrical impedance measurement provided rapid and simple sensing mechanism to develop chemical sensor and biosensors with bulk nano electrodes.
authors.affiliation: Nanotechnology Information Analysis Team, Korea Institute of Science and Technology Information, Seoul 130-741, Korea.
authors.forename: Dae-Sup
authors.initials: DS
authors.lastname: So
authors.forename: Inpil
authors.initials: I
authors.lastname: Kang
authors.forename: Hoon
authors.initials: H
authors.lastname: Huh
authors.forename: Haiwon
authors.initials: H
authors.lastname: Lee
mesh_terms: D001704:Biopolymers / Q000032:analysis*; D015374:Biosensing Techniques / Q000295:instrumentation*; D003217:Conductometry / Q000295:instrumentation*; D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size
chemical_list: D001704:Biopolymers