Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3235
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dc.contributor蔡毓楨zh_TW
dc.contributorYu-Chen Tsaien_US
dc.contributor.author吳維哲zh_TW
dc.contributor.authorWu, Wei-Cheen_US
dc.contributor.other化學工程學系所zh_TW
dc.date2012en_US
dc.date.accessioned2014-06-06T05:31:31Z-
dc.date.available2014-06-06T05:31:31Z-
dc.identifierU0005-0407201216112600en_US
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dc.identifier.urihttp://hdl.handle.net/11455/3235-
dc.description.abstract本論文成功的利用簡單且快速的方法來製備以碳化矽(SiC)奈米粒子為主要材料之感測器。本論文分成兩部分,第一部分主要在探討SiC奈米薄膜修飾於玻璃碳電極(GCE)上作為多巴胺化學感測器之應用。利用原子力顯微鏡(AFM)與場發射掃描式電子顯微鏡(FE-SEM)去觀察所製備出SiC奈米薄膜修飾於GCE (SiC/GCE)前後之表面形貌差異。接著再利用循環伏安法與方波伏安法來研究所製備出之SiC/GCE對於多巴胺,敗壞血酸和尿酸之電化學特性。將其與未修飾之GCE比較發現SiC/GCE在多巴胺,敗壞血酸與尿酸中的電化學行為均優於GCE,表示SiC奈米粒子對於多巴胺,敗壞血酸與尿酸均具有良好的電催化效果。此外,SiC/GCE可以在含有干擾物的情況下準確的偵測出多巴胺的含量,靈敏度為16.9 A M-1 cm-2 而偵測極限則為 0.05 mM。 第二部分的主題主要在探討GOD (Glucose oxidase)酵素的直接電子傳遞性質與其應用,將GOD酵素與SiC/Nafion奈米複合薄膜一起修飾於GCE上,利用AFM去觀察GOD酵素修飾前與修飾後表面微結構的變化。並利用循環伏安法與安培法來探討GOD/SiC/Nafion奈米複合薄膜的電化學性質。由循環伏安法在0.1M的磷酸緩衝溶液(pH 7)的掃描之下可觀察到一對可逆的氧化還原峰出現在-0.388 V與-0.459 V的位置,表示GOD酵素保持良好的活性在此奈米複合薄膜之中,並由不同掃描速率實驗得知此奈米複合薄膜為表面控制反應(surface-controlled)。經由各個條件最佳化後,利用安培法以GOD/SiC/Nafion奈米複合薄膜來偵測葡萄糖濃度,所得到的靈敏度為5.95 μA mM-1 cm-2,偵測極限為2.27 μM,線性範圍為10-1100 μM,KM值為1.0 mM。由干擾物實驗證實此葡萄糖生物感測器可避免掉敗壞血酸,尿酸的干擾,並成功將GOD/SiC/Nafion奈米複合薄膜用來偵測合成血清中的葡萄糖。zh_TW
dc.description.abstractThis study demonstrates that an efficient electrode for electrocatalytic detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA) can be directly obtained using cast deposition of silicon carbide (SiC) nanoparticles onto the surface of glassy carbon electrode. The morphology of the resulting SiC film was characterized by atomic force microscopy. cyclic voltammetry and differential pulse voltammetry were used to investigate the electrochemical behaviors of AA, DA, and UA at the SiC coated glassy carbon electrode. Compared to a bare glassy carbon electrode, the SiC coated glassy carbon electrode exhibits the abilities to lower the electrooxidation potential and to raise the current responses of AA, DA, and UA. The SiC coated electrode resolved the overlapping voltammetric responses of AA, DA, and UA, which could be used for selective determination of DA in the presence of AA and UA. The peak currents obtained from DPV for selective determination of DA in the presence of AA and UA displayed a sensitivity of 16.9 A M-1 cm-1 and a detection limit of 50 nM. The SiC coated glassy carbon electrode shows excellent sensitivity, good selectivity, and low detection limit for DA detection, thus is promising for the future development of electrochemical sensors. In the next part, SiC was used to prepare a biosensor electrode for the detection of glucose concentrations by direct electrochemistry of glucose oxidase (GOD). The morphology of the GOD/SiC/Nafion nanocomposite was characterized by atomic force microscopy. The root-mean-square roughness value of the film surface decreased significantly after GOD was immobilized in the SiC/Nafion nanocomposite film. The electrochemical performance of the GOD/SiC/Nafion modified electrode was investigated by cyclic voltammetry and amperometric. Cyclic voltammetry measurements of the immobilized GOD showed a pair of well-defined and quasi-reversible redox peaks at the SiC-based electrode and provided evidence for a surface-controlled electrode process. Amperometric results showed the biosensor to have low detection limit (2.27 μM) to glucose over a linear concentration range of 10 to 1100 μM (r2 = 0.999). The biosensor exhibits good reproducibility and anti-interference properties, and is suitable for application in the determination of glucose in synthetic serum.en_US
dc.description.tableofcontents摘要 ....................................................................................... i Abstract .................................................................................. iii 總目錄 ............................................................................... v 圖目錄 ................................................................................ vii 表目錄 .................................................................................. xi 第一章 緒論 ................................................. 1 1.1前言 .................................................................................................................... 1 1.2 分析物之簡介 ................................................................................................... 3 1.2.1 多巴胺 .................................................................................................... 3 1.2.2 葡萄糖 .................................................................................................... 4 1.3 直接電子傳遞與葡萄糖氧化酵素之簡介 ....................................................... 6 1.3.1 直接電子傳遞 ........................................................................................ 6 1.3.2 葡萄糖氧化酵素 .................................................................................... 9 1.4待測物文獻回顧 .............................................................................................. 12 1.4.1 多巴胺的檢測方法 .............................................................................. 12 1.4.2 血糖的檢測方法 .................................................................................. 17 1.5 碳化矽簡介 ..................................................................................................... 30 1.6 電化學方法 ..................................................................................................... 33 1.6.1 循環伏安法 (cyclic voltammetry) ...................................................... 33 1.6.2 方波伏安法 .......................................................................................... 36 1.6.3 安培法 (Amperometry) ....................................................................... 37 1.6.4 交流阻抗法 (Impedance) .................................................................... 40 第二章 實驗方法與步驟 ....................................................................... 41 2.1實驗藥品 .................................................................................... 41 2.2 實驗儀器 ......................................................................................................... 41 2.3 實驗步驟 ......................................................................................................... 44 2.3.1 電極前處理 .......................................................................................... 44 2.3.2 製備SiC/GCE ...................................................................................... 45 2.3.3製備GOD/SiC/Nafion/GCE ................................................................. 45 2.3.4 電化學分析 .......................................................................................... 47 第三章結果與討論 ................................................................................... 49 3.1 SiC /GCE之探討 ............................................................................................. 50 3.1.1 SiC /GCE微觀表面形貌之探討 .......................................................... 50 3.1.2 多巴胺、尿酸、敗壞血酸電化學行為之探討 .................................. 54 3.1.3不同掃描速率影響之探討 ................................................................... 57 3.1.4干擾物影響之探討 ............................................................................... 59 3.1.5方波伏安法偵測多巴胺之探討 ........................................................... 61 3.2 GOD/SiC/Nafion/GCE之探討 ........................................................................ 64 3.2.1 GOD/SiC/Nafion微觀表面形貌探討 .................................................. 64 3.2.2 GOD/SiC/Nafion之EIS特性探討 ...................................................... 66 3.2.3 GOD之直接電子傳遞特性探討 ......................................................... 67 3.2.4 SiC與GOD酵素最適化值之探討 ..................................................... 69 3.2.5 pH值影響之探討 ................................................................................. 73 3.2.6掃描速率影響之探討 ........................................................................... 75 3.2.7 GOD/SiC/Nafion/GCE作為葡萄糖感測器之探討 ............................. 77 3.2.8干擾物影響與合成血清應用之探討 ................................................... 81 第四章 結論與未來展望 .................................................................................. 85 4.1 結論 ...................................................................................................... 85 4.2 未來展望 ......................................................................................................... 87 第五章 參考文獻 .......................................................................................... 88zh_TW
dc.language.isozh_TWen_US
dc.publisher化學工程學系所zh_TW
dc.relation.urihttp://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0407201216112600en_US
dc.subject碳化矽zh_TW
dc.subjectsilicon carbideen_US
dc.subject電化學感測器zh_TW
dc.subjectelectrochemical sensorsen_US
dc.title碳化矽奈米薄膜作為電化學感測器之探討zh_TW
dc.titleElectrochemical sensors based on silicon carbide nanocompositeen_US
dc.typeThesis and Dissertationzh_TW
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item.languageiso639-1zh_TW-
item.openairetypeThesis and Dissertation-
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