Organosilane self-assembled monolayer-modified field effect transistors for on-chip ion and biomolecule sensing

Daisuke Niwa, Kaoru Omichi, Norikazu Motohashi, Takayuki Homma, Tetsuya Osaka

研究成果: Article

40 引用 (Scopus)

抄録

Field effect transistors (FETs) modified with various functional monolayers, such as organosilane monolayer, were formed on the identical substrate by precise control of the fabrication processes. The devices showed a typical transistor property with a good stability in aqueous solutions. The amino monolayer-modified FET acted as an ion sensitive FET with a good pH sensitivity of 58 mV/pH, and the perfluoro-alkyl monolayer-modified FET worked as a reference device. Moreover, the device with enzyme immobilized onto amino modified gate electrode enabled to detect trace concentration (10-9 to 10-6 M) of urea with a high sensitivity of 64 mV/decade. These monolayer-modified devices were expected to be applied as working and reference electrodes for on-chip ion and biosensing.

元の言語English
ページ(範囲)721-726
ページ数6
ジャーナルSensors and Actuators, B: Chemical
108
発行部数1-2 SPEC. ISS.
DOI
出版物ステータスPublished - 2005 7 22

Fingerprint

Biomolecules
Self assembled monolayers
Field effect transistors
Monolayers
field effect transistors
chips
Ions
ions
electrodes
sensitivity
Ion sensitive field effect transistors
Immobilized Enzymes
ureas
Electrodes
enzymes
transistors
Urea
aqueous solutions
Transistors
Enzymes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

これを引用

Organosilane self-assembled monolayer-modified field effect transistors for on-chip ion and biomolecule sensing. / Niwa, Daisuke; Omichi, Kaoru; Motohashi, Norikazu; Homma, Takayuki; Osaka, Tetsuya.

:: Sensors and Actuators, B: Chemical, 巻 108, 番号 1-2 SPEC. ISS., 22.07.2005, p. 721-726.

研究成果: Article

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AU - Osaka, Tetsuya

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