Enzyme Immunoassay Using a Reusable Extended-gate Field-Effect-Transistor Sensor with a Ferrocenylalkanethiol-modified Gold Electrode
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- KAMAHORI Masao
- Central Research Laboratory, Hitachi, Ltd.
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- ISHIGE Yu
- Central Research Laboratory, Hitachi, Ltd.
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- SHIMODA Maki
- Hitachi ULSI Systems Co., Ltd.
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説明
A reusable extended-gate field-effect transistor (FET) sensor with an 11-ferrocenyl-1-undecanethiol (11-FUT) modified gold electrode was developed for applying to enzyme immunoassay. It was found that the 11-FUT modified FET sensor detected a thiol compound 50 times or more repeatedly after a treatment with a 5% hydrogen peroxide solution. The gate-voltage shift of the FET sensor showed a fairly good linearity (R2 = 0.998) within a range from 10-2 to 10-6 M on the concentration of 6-hydroxyl-1-hexanethiol, which is a thiol compound, at a Nernstian response of 58.5 mV/decade. The FET-based immunoassay was constructed by combining the 11-FUT modified-FET sensor with the enzyme-linked immunosorbent assay (ELISA), in which the enzyme chemistry of acetylcholinesterase (AChE) was used to generate a thiol compound. The 11-FUT modified FET sensor with an AC voltage at 1 MHz superimposed onto the reference electrode detected the AChE-catalyzed product corresponding to a serum concentration of interleukin 1β from 10 to 5000 pg/mL. In addition, all measurements were successfully performed by using the same FET-sensor chip after a treatment with a 5% hydrogen peroxide solution.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 24 (9), 1073-1079, 2008
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679234996992
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- NII論文ID
- 130004441709
- 10025205883
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- NII書誌ID
- AA10500785
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 9647602
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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