TOP > 外国特許検索 > p CHANNEL FILED EFFECT TRANSISTOR AND SENSOR USING THE SAME

p CHANNEL FILED EFFECT TRANSISTOR AND SENSOR USING THE SAME

外国特許コード F110003433
整理番号 A111-35EP
掲載日 2011年6月27日
出願国 欧州特許庁(EPO)
出願番号 04723347
公報番号 1610121
公報番号 1610121
出願日 平成16年3月25日(2004.3.25)
公報発行日 平成17年12月28日(2005.12.28)
公報発行日 平成29年3月15日(2017.3.15)
国際出願番号 JP2004004196
国際公開番号 WO2004086025
国際出願日 平成16年3月25日(2004.3.25)
国際公開日 平成16年10月7日(2004.10.7)
優先権データ
  • 特願2003-082986 (2003.3.25) JP
  • 2004WO-JP04196 (2004.3.25) WO
発明の名称 (英語) p CHANNEL FILED EFFECT TRANSISTOR AND SENSOR USING THE SAME
発明の概要(英語) (EP1610121)
A p channel field effect transistor in which the sensitivity of an enzyme can be enhanced by immobilizing the enzyme directly on an FET channel surface (diamond surface), as well as a sensor including the same, is provided.
A diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals is treated under the action of glutaraldehyde OHC(CH2)3CHO (30), so that the glutaraldehyde (30) is immobilized on the diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals.
Subsequently, urease (29) is further applied thereto, so that the amino group (31) of the urease (29) is bonded to the glutaraldehyde (30).
That is, the urease (29) can be immobilized on the diamond surface (22) having mixed hydrogen terminals, oxygen terminals, and amino terminals.
When the urea concentration is increased from 10<-6> M to 10<-2> M, the threshold voltage shifts by about 0.1 V in the positive direction, and the sensitivity to urea concentration of 30 mV/decade is exhibited. <IMAGE>
特許請求の範囲(英語) [claim1]
1. A p channel field effect transistor in which a liquid electrolyte is used as a gate, and a polycrystalline or monocrystalline diamond surface having mixed hydrogen terminals, oxygen terminals, and amino terminals serves as a channel.
[claim2]
2. A sensor characterized by including the p channel field effect transistor according to Claim 1 and exhibiting a pH sensitivity through the use of a shift of threshold voltage in the positive direction on the surface having mixed amino terminals and oxygen terminals in response to an increase in pH of the liquid electrolyte.
[claim3]
3. The sensor according to Claim 2, characterized in that the increase in pH is 2 to 12.
[claim4]
4. The sensor according to Claim 2 or Claim 3, characterized in that urease is immobilized to the amino terminal on the surface with glutaraldehyde (divalent aldehyde) therebetween, the threshold voltage shifts in the positive direction in response to an increase in urea concentration and, thereby, the sensitivity to urea is exhibited.
[claim5]
5. The sensor according to Claim 4, characterized in that the increase in urea concentration is 10**-6 M to 10**-2 M.
  • 出願人(英語)
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • 発明者(英語)
  • KAWARADA HIROSHI
国際特許分類(IPC)
欧州特許分類/主・副
  • G01N027/414
指定国 (EP1610121)
Contracting States: DE FR GB
参考情報 (研究プロジェクト等) CREST Function Evolution of Materials and Devices based on Electron/Photon Related Phenomena AREA
ライセンスをご希望の方、特許の内容に興味を持たれた方は、問合せボタンを押してください。

PAGE TOP

close
close
close
close
close
close