Title Page
Contents
Ⅰ. Introduction 10
Ⅱ. Experiments 12
1. Reagents 12
2. Instruments 12
3. Electrode fabrication by alternating current plasma treatment 13
Ⅲ. Results and discussion 17
1. Contact angle and wettability 17
2. Scanning Electron Microscopy (SEM) analysis 18
3. Energy Dispersive X-ray Spectrometry (EDS) analysis 20
4. X-ray photoelectron spectroscopy (XPS) spectra 21
5. Cyclic Voltammetry of fabricated electrodes 25
6. FT-IR spectra of CuO-MBA-PAA electrode 27
7. Electrocatalytic Determination of H₂O₂ 27
Ⅳ. Conclusions 34
References 35
Abstract 38
Table 1. Preparation of the precursors for AC plasma polymerization onto ITO surface 15
Figure 1. Suggested mechanism of the formation of the CuO-loaded PAA by AC plasma polymerization. 16
Figure 2. Contact angles of (a) bare ITO, (b) PAA/ITO, (c) CuO/ITO, (d) Fe₂O₃/ITO and (e) ZnO/ITO electrodes. 17
Figure 3. SEM images of (a) bare ITO, (b) PAA/ITO, (c) CuO-PAA/ITO, (d) Fe₂O₃-PAA/ITO and (e) ZnO-PAA/ITO electrodes coated on ITO. 18
Figure 4. SEM images B-types electrodes: (a) MBA-PAA/ITO, and (b) CuO-MBA-PAA electrode 19
Figure 5. EDS spectra of (a) bare ITO, (b) PAA/ITO, (c) CuO/ITO, (d) Fe₂O₃/ITO and (e) ZnO/ITO electrodes. 20
Figure 6. XPS spectra of (a) bare ITO, (b) PAA/ITO, (c) CuO/ITO, (d) Fe₂O₃/ITO and (e) ZnO/ITO electrodes. 23
Figure 7. XPS spectra of (a) MBA-PAA and (b) CuO-MBA-PAA electrodes. 24
Figure 8. Cyclic voltammograms of bare ITO, PAA/ITO, CuO-PAA/ITO, Fe₂O₃-PAA/ITO and ZnO-PAA/ITO electrodes 25
Figure 9. FT-IR spectra of CuO-MBA-PAA electrode 27
Figure 10. Cyclic voltammograms of the bare ITO, PAA-MBA/ITO, and CuO-MBA-PAA electrode in 0.1M PBS (pH=7.4). 28
Figure 11. Cyclic voltammograms of CuO-MBA-PAAelectrode in PBS 0.1M pH 7.4 with different concentrations of H₂O₂ at a scan rate 100 mV/s 29
Figure 12. Amperometric response of CuO-MBA-PAA/ITO electrode by adding H₂O₂ in 0.1M PBS at -0.4 V and the detection calibration curves by adding H₂O₂ 30
Figure 13. Selectivity of CuO-MBA-PAA/ITO electrode. 31
Figure 14. Stability of CuO-MBA-PAA/ITO electrode. 32
Scheme 1. Schematic diagrams of the AC plasma polymerization process and device. 13