Calibration method for a carbon nanotube field-effect transistor biosensor
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Updated: May 30, 2026
Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
Published on: July 22, 2013
Masuhiro Abe1, Katsuyuki Murata, Tatsuaki Ataka
1Future Creation Laboratory, Olympus Corporation, Shinjuku Monolith, 3-1 Nishi-Shinjuku 2-chome, Shinjuku, Tokyo 163-0914, Japan. NEDO c/o Olympus Corporation, Shinjuku Monolith, 3-1 Nishi-Shinjuku 2-chome, Shinjuku, Tokyo 163-0914, Japan.
Abstract:
An easy calibration method based on the Langmuir adsorption theory is proposed for a carbon nanotube field-effect transistor (NTFET) biosensor. This method was applied to three NTFET biosensors that had approximately the same structure but exhibited different characteristics. After calibration, their experimentally determined characteristics exhibited a good agreement with the calibration curve. The reason why the observed characteristics of these NTFET biosensors differed among the devices was that the carbon nanotube (CNT) that formed the channel was not uniform. Although the controlled growth of a CNT is difficult, it is shown that an NTFET biosensor can be easy calibrated using the proposed calibration method, regardless of the CNT channel structures.
