Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (4): 634.

• Articles • Previous Articles     Next Articles

Enhancement of Glucose Biosensor Sensitivity by Addition of Silver Sols

TANG Fang-Qiong1, SHEN Ji-Feng1, ZHANG Jin-Fang2, ZHANG Gai-Lian2   

  1. 1. Institute of Photographic Chemistry, Chinese Academy of Sciences, Beijing, 100101;
    2. Department of Chemistry, Beijing Normal University, Beijing, 100875
  • Received:1998-11-02 Online:1999-04-24 Published:1999-04-24

Abstract: Anew method for preparation of amperometric glucose oxidase electrode based on enzyme immobilization by Ag sols has been investigated. GOD was simply mixed with Ag nanoparticles and cross linked with a polyvinyl butyl(PVB) medium by glutaradehyde and was coatted on electrode by dipping a platinum wire into the sol-gel solution. In experiments, we discussed the effects of different kinds of silver gels on response of the electrode and the mechanism about it. For the optimum conditions, the current response of the enzyme electrode containing hydrophobic silver gels for 10 mmol/Lglucose was enhanced to 18200 nAas compared with the electrode without silver gels with 280n Acurrent response. In addition to the high sensitivity, the electrode responses rapidly, the 95% steady-state response time is less than 20s.

Key words: Silver nanoparticle, Glucose oxidase, High sensitivity, Rapid response

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