臺灣博碩士論文加值系統

在本篇研究中，我們利用電化學成長法在可撓式的基材上成長金奈米結構，藉由調控實驗的表面活性劑濃度、伏特數以及溫度，我們成功地在基材上成長出一維的金奈米線結構、二維的金奈米薄片以及多孔性的金奈米珊瑚狀結構。我們利用穿透式電子顯微鏡、掃描式電子顯微鏡做結構分析，發現金奈米線的直徑約為80 – 120 nm，成長方向為[110]、金奈米薄片厚度約為13 – 18 nm，成長方向也是[110]、金奈米珊瑚狀的寬度約為 100 – 200 nm，成長方向也是[111]。我們也利用電化學方法對這三種金奈米結構作分析，發現這三種金奈米結構都具有非常高的電化學表面積，其中以金奈米線的表面積最大。我們利用這三種金奈米結構作為電化學感測電極來感測多巴胺，並發現這三種金奈米結構的電極對於多巴胺都具有很好的電化學感測能力，其中又以金奈米線的表現最為突出，其偵測範圍為 0.2 uM – 600 uM，(N = 3)，偵測極限為 26 nM (S/N = 3)

In this study, we fabricated Au nanowires (NWs), nanoslices (NSs), and nanocorals (NCs) on flexible polyethylene terephthalate (PET) substrates via direct current electrochemical depositions. Without any modification, the Au nanostructures were used as the electrodes for dopamine (DA) sensing. Among them, the Au NW electrode performed exceptionally well. The determined linear range for DA detection was 0.2 – 600 uM (N = 3) while the detection limit was 26 nM (S/N = 3).

English Abstract i
Chinese Abstract ii
Acknowledgements iii
Content v
Contents of Tables vii
List of Figures viii

1. Introduction 1
2. Experimental 2
2.1 Chemicals 2
2.2 Preparation of Growth Substrate 3
2.3 Fabrication of nanostructured Au electrodes 3
2.4 Instruments 4
2.5 Electrochemical Experiments 4
3. Results and Discussion 5
3.1 Growth and characterization of gold nanostructures 5
3.2 Electrochemical catalysis of dopamine on nanostructured gold electrodes 6
3.3 Amperometric responses of dopamine on nanostructured gold electrodes 7
3.4 Fouling and stability of nanostructured gold electrodes 8
3.5 Interferences from ascorbic and uric acids to amperometric detection of dopamine on nanostructured gold electrodes 9
4. Conclusion 12
References 21
Supporting Information 23

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