Surface-modified Diamond Field-effect Transistors for Enzyme-immobilized Biosensors
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- Song Kwang-Soup
- School of Science and Engineering, Waseda University CREST, Japan Science and Technology Corporation (JST)
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- Degawa Munenori
- School of Science and Engineering, Waseda University CREST, Japan Science and Technology Corporation (JST)
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- Nakamura Yusuke
- School of Science and Engineering, Waseda University CREST, Japan Science and Technology Corporation (JST)
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- Kanazawa Hirofumi
- School of Science and Engineering, Waseda University CREST, Japan Science and Technology Corporation (JST)
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- Umezawa Hitoshi
- School of Science and Engineering, Waseda University CREST, Japan Science and Technology Corporation (JST)
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- Kawarada Hiroshi
- School of Science and Engineering, Waseda University CREST, Japan Science and Technology Corporation (JST)
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Abstract
The enzyme sensors using electrolyte-solution-gate diamond field effect transistors (SGFETs) have been developed for the first time. The hydrogen-terminated surface channel of the FETs was modified into partially aminated and oxygen-terminated (H-A-O-terminated) with irradiation of ultraviolet in an ammonia environment. The pH response of that is obtained about 50 mV/pH at pH 2–10. The concentration of substrates (urea or glucose) in the electrolyte solution has been detected by the pH change due to the bio-catalyzed effect of enzyme (urease or glucose oxidase), which is immobilized on the channel of SGFETs. The sensitivity of urea and glucose is approximately 30 mV/decade and 20 mV/decade respectively.
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 43 (6B), L814-L817, 2004
The Japan Society of Applied Physics
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Details 詳細情報について
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- CRID
- 1390282681241933312
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- NII Article ID
- 10013161453
- 130004532294
- 210000057333
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- NII Book ID
- AA11906093
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- ISSN
- 13474065
- 00214922
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- NDL BIB ID
- 6971942
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed