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Glucose Sensor

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Title: Glucose Sensor


1
Glucose Sensor
  • ??????? 20031263 ???

2
Contents
3
?? ??
  • Cyclic Voltammetry? Chronoamperometry? ???? ???
    ???? ?? ??
  • ???? GOD? ???? ??,
  • Glucose ? ??

4
?? ??
?? ?? ???
5
Chronoamperometry
  • ????? ??? ???? ??? ????? ???? ??
  • ????? ??? E1?? ??
  • ??? ???? E2 ?? E3?? ??
  • ?? ???? ??? ???
  • ?? ??? ??? ??? ??

6
Chronoamperometry
  • ?? ?? ??? Cottrell??? ??
  • ????
  • ?? ???? ???? ??? 0? ??? ? ??? ??? ??

7
Cyclicvoltammetry
  • ????? ??? ??? ?? ????? ??-?? ??? ??-?? ??? ??
  • ???? ?? ??
  • ??-?? ??? ???? ??
  • - ???? ??? ?? ???? ??? ??
  • - ???? ??? ??? ??

8
Cyclicvoltammetry
? ?? cyclicvoltammetry
9
Cyclicvoltammetry
  • ????
  • ??? ??

10
Glucose Oxidase(GOD)
  • ??? electron accepter? ??
  • ß-D-glucose ? ?????
  • D-glucono-1,5-lactone?
  • ?????? ???? ??? ??

11
Enzyme Kinetics
  • ?? ??-?? ?? ??? ???
  • -- Michaelis-Menten ???
  • ? ??? ??
  • ?? ?? ??
  • ?? ???? ??

12
Enzyme Kinetics
  • ? ??? ?? ???
  • (1)
  • (2)
  • (3)

13
Enzyme Kinetics
  • ? ?? ????
  • ? ?? ????? ???

14
Biochip
?? ??? ???(???) ????? ????
DNA ?
Lap-on-a chip
??? ?
15
Biochip
16
Bio Sensor
  • ?? ????? ???? ?? ???? ?? ???? (???? ????)

17
?? ??
  • (1) Cyclic voltammetry
  • Working electrode polishing ??
  • ? 0.3µm? alumina powder? 2? ???? disperse??
    polishing pad? ??? polishing pad? glassy carbon
    working electrode? ???? 34? ?? ???? ????.
  • ? Working electrode? EtOH? 2? ???? ????.
  • ? Working electrode? EtOH 50? 2? ??? 50? ??
    tube? ???? sonication ????.(23?)
  • ? N2 gas? ????.
  •     .

18
?? ??
  • Fe3(CN)63- / Fe2(CN)4-6 couple? Cyclic
    Voltammetry
  • ? 1.0mM K3Fe(CN)6 , 0.1 M KNO3 solution 5mL?
    Electrochemical cell? ?? electrode? ?????.
  • ? Cyclic voltammetry program? ?????? ?????.
  • ? Cyclic voltammetry? Potential ??, scan rate,
    currunte range? ????.
  •   (Scan rate? ?? 10mV/s, 20mV/s, 50mV/s, 100mV/s,
    200mV/s?? ????.)
  • ? Program ??? ??? cyclic voltammetry ??? sweep??.
  •   (? ??? ???? ????? negative scan? ???? ??.)
  • ? Cyclic voltammogram? ???.

19
?? ??
  • (2) Chronoamperometry
  • ? 1.0 mM  K3Fe(CN)6 , 0.1 M KNO3 solution 2 mL?
    Electrochemical cell? ?? electrode? ?????.
  • ? ?? ??? ???? ??? ??(????)? ??? ? ?? ??? ?? ? ???
    ???? ?? ?? ??? ?? ??? ?? i-t ???? ?????.

20
?? ??
  • (3) ? ?? ?? ? ??
  • ??? ??? GOD? ???? glucose? ????

21
?? ??
  • (3) ? ?? ?? ? ??
  • ? ?? ?? ??(Pt working electrode)? polishing ??.
  • ? Polishing ? ?? ????? GOD 1µL? loading??.
  • ? GOD? ??? ?? ? GOD? ?? ??? ????? ?? Nafion 1µL?
    loading??.
  • ? ??? ??? ?? ??? ?? ?? (Pt counter electrode), ??
    ??(Ag/AgCl reference electrode)? ?? potentiostat?
    ???? 0.1M, pH7.0 phosphate buffer 5mL? ???. ??
    ??? magnetic stirrer? ???? ?? ????.
  • ? GOD? ?? glucose? ????? ???? H2O2 ? ???? ??
    0.6V(va.Ag/AgCl)? ????? ????.
  • ? Background? ???? 0.25M? glucose?
  • micro-syringe? ???? 20µL? injection??.
  • (1mM? ????.)

22
?? ??
  • Cyclicvoltammetry
  • 1) Scan rate ??? ?? cyclicvoltammetry

1?? ??
23
?? ??
  • 2)(Scan rate)1/2? ?? peak current

24
?? ??
  • 2)(Scan rate)1/2? ?? peak current

25
?? ??
  • (2) ?? ?? ??? ?? chronoamperometry

26
?? ??
  • (3) ? ?? ?? ? ? ??
  • Glucose injection? ?? ??? ?? current? ??

27
?? ??
  • 2) Calibration curve

28
?? ??
  • 3) Lineweaver-Burk plot

29
??
  1. Cyclicvoltammetry?? scan rate? peak current? ???
    ? ? ??? 1?? ??? ??? ? ???.
  2. Chronoamperometry?? ????? ?? ???? ?? ??? ? ? ???.
  3. ??? ???? glucose? ?? ?? ???? ??? ??? ??? ? ???.

30
??
  • ???? ?? ???
  • ??? ???? ?? ???
  • Injection? ??? ???
  • ??? ?? ??
  • Injection? ????? ??
  • ??? ?? ? ???? buffer??? ??

31
??
  • ??? ???? ?
  • Polishing
  • ?? ???
  • ???? ??

32
Application
  • ?? ?? ???? ??? ????
  • ????, ?????? ??? ??
  • Ex) ????? ??? ??? ??? ??

33
?? ??
  • (1) ???, ???,  ???? ??,  ???? ??,  2001, pp
    206-208, pp 213-242
  • (2) Osaka, T.   ???????,   ??????,  1994,   pp
    153-160, pp 113-132
  • (3) ???,   ?????,   ????,   1994,   pp 5-12, pp
    304-316
  • (4)http//www.biol.paisley.ac.uk/marco/enzyme_elec
    trode/chapter3/chapter3_page1.htm
  • (5)http//kin.naver.com/open100/db_detail.php?d1id
    11dir_id110205eid8K3oLqNj7X4Jrz1xEkivYmbIEeI
    Lkn3qbudnAzL/AxKg                              
            
  • (6)http//www.cartage.org.lb/en/themes/sciences/Ch
    emistry/Electrochemis/Electrochemical/CyclicVoltam
    metry/CyclicVoltammetry.htm

34
?????!
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