Robust electrochemical transducer using conductive polymer (PEDOT : PSS) composite for glucose biosensor application /
Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) is widely used in the fabrication of capacitors, solar cells, transistors, and especially biosensors. Stability and adhesion of a PEDOT:PSS transducer in liquid media are major problems in the fabrication of robust sensors owing to th...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Kuala Lumpur :
Kulliyyah of Engineering, International Islamic University Malaysia,
2017
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| Subjects: | |
| Online Access: | http://studentrepo.iium.edu.my/handle/123456789/5194 |
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| LEADER | 038810000a22002890004500 | ||
|---|---|---|---|
| 008 | 180308s2017 my a f m 000 0 eng d | ||
| 040 | |a UIAM |b eng |e rda | ||
| 041 | |a eng | ||
| 043 | |a a-my--- | ||
| 050 | 0 | 0 | |a TK7872.T6 |
| 100 | 1 | |a Abdelmohsen, Benoudjit, |e author | |
| 245 | 1 | 0 | |a Robust electrochemical transducer using conductive polymer (PEDOT : PSS) composite for glucose biosensor application / |c by Benoudjit Abdelmohsen |
| 264 | 1 | |a Kuala Lumpur : |b Kulliyyah of Engineering, International Islamic University Malaysia, |c 2017 | |
| 300 | |a xv, 112 leaves : |b illustrations ; |c 30cm. | ||
| 336 | |2 rdacontent |a text | ||
| 502 | |a Thesis (MSBTE)--International Islamic University Malaysia, 2017. | ||
| 504 | |a Includes bibliographical references (leaves 75-78). | ||
| 520 | |a Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) is widely used in the fabrication of capacitors, solar cells, transistors, and especially biosensors. Stability and adhesion of a PEDOT:PSS transducer in liquid media are major problems in the fabrication of robust sensors owing to the easy disintegration of PEDOT:PSS from electrode surfaces. In this study, the effect of using electropolymerization deposition (EPD) and drop-casting (DC) on the stability and adhesion of the PEDOT:PSS transducer were studied. Furthermore, the effect of PEDOT:PSS ratio on the stability of the transducer in liquid media was investigated and a glucose biosensor was synthesized and characterized based on an electropolymerized PEDOT:PSS transducer. The galvanostatic mode was employed using a potentiostat/galvanostat at 100 µA and 400 mV for electropolymerization deposition of EDOT and PSS to PEDOT:PSS on electrode surfaces. A PEDOT:PSS transducer deposited on a flat platinum electrode (FPtE) and soaked in phosphate-buffered saline (PBS) solution for more than 15 days showed long-term stability, retaining almost 99% of its original activity. For further confirmation of the robustness of a PEDOT:PSS transducer synthesized by EPD, a commercially available aqueous dispersion of PEDOT:PSS was deposited by DC on FPtE as transducer for comparison purposes. The stability and adhesion of PEDOT:PSS deposited via EPD and DC were tested in dynamic liquid media. A PEDOT:PSS transducer fabricated using EPD maintained almost 99.9% of its original activity after a water-flow test; in contrast, the one fabricated using DC lost 95% of its original activity. Field emission scanning electron microscope (FESEM) results revealed that the structure of the PEDOT:PSS transducer fabricated using EPD remains intact on electrode surfaces after a water-flow test. Moreover, with EPD, the PEDOT:PSS ratio did not have any effect on the stability of a PEDOT:PSS transducer. Finally, a glucose biosensor with a PEDOT:PSS transducer was successfully fabricated, and the sensitivity and efficiency were 285.2 nA/mM and 17.68 µA/mM cm2, respectively. The results suggest that using EPD to synthesize a PEDOT:PSS transducer could enhance the robustness of the transducer in liquid media, thereby providing a future platform for electrochemical biosensors with high sensitivity and stability, especially for dynamic liquid media use. | ||
| 596 | |a 1 | ||
| 655 | 7 | |a Theses, IIUM local | |
| 690 | |a Dissertations, Academic |x Department of Biotechnology Engineering |z IIUM | ||
| 710 | 2 | |a International Islamic University Malaysia. |b Department of Biotechnology Engineering | |
| 856 | 4 | |u http://studentrepo.iium.edu.my/handle/123456789/5194 | |
| 900 | |a sbh-aaz-ls | ||
| 999 | |c 440009 |d 472587 | ||
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| 952 | |0 0 |6 TS CDF TK 7872 T6 A1358R 2017 |7 0 |8 THESES |9 856298 |a IIUM |b IIUM |c MULTIMEDIA |g 0.00 |o ts cdf TK 7872 T6 A1358R 2017 |p 11100380500 |r 2018-08-10 |t 1 |v 0.00 |y THESISDIG | ||