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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 鄭修偉 | zh_TW |
dc.contributor.advisor | Hsiu-Wei Cheng | en |
dc.contributor.author | 徐于捷 | zh_TW |
dc.contributor.author | Yu-Chieh Hsu | en |
dc.date.accessioned | 2023-12-20T16:25:26Z | - |
dc.date.available | 2023-12-21 | - |
dc.date.copyright | 2023-12-20 | - |
dc.date.issued | 2023 | - |
dc.date.submitted | 2023-10-02 | - |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91308 | - |
dc.description.abstract | 本研究著重於探究2-苯乙硫醇(2PET) 在金表面形成自組裝單分子層(SAMs)的現象。自組裝單分子層是有序的有機分子薄膜,廣泛應用於表面修飾、生物感測和電子器件等領域。然而,我們的研究發現2-苯乙硫醇在金表面呈現出異常的弱相互作用,導致自組裝單分子層無法形成。為了釐清這種獨特行為,我們對不同實驗條件,包括溫度、浸泡時間和濃度等進行了探討。儘管嘗試不同的變數組合,化學分析電子能譜(XPS)測量顯示在金表面上無硫信號,顯示缺乏硫醇單分子層,這與傳統的硫醇-金相互作用相矛盾,因此我們進一步深入研究。
我們將研究擴展到銅和銀表面,發現2PET 在這兩種表面上表現出強的親和性,形成明確的單分子層。這一觀察結果凸顯了硫醇-金屬相互作用的複雜性,不僅受到硫-金屬鍵強度影響,還受到其他因素的調節。微觸摸印刷(μCP)和原子力顯微鏡(AFM)分析進一步驗證了2-苯乙硫醇與金之間的弱相互作用,由缺乏明確的正方型圖樣可知。 為了揭示這種現象背後的原因,我們提出利用控制金表面氧化來改變表面性質,增強2-苯乙硫醇的吸附能力。通過表面等離子共振(SPR)測量來監測吸附動力學。我們的研究成果為了解自組裝單分子層形成機制和表面修飾技術提供了重要見解。這些知識將有助於開發功能化表面,在生物感測器、電子器件和奈米技術等領域中得到應用。 | zh_TW |
dc.description.abstract | This research focuses on the formation of self-assembled monolayers (SAMs) on gold surfaces using 2-phenylethanethiol (2PET) as the thiol molecule. SAMs are ordered organic molecular films with diverse applications in surface modification, biosensing, and electronic devices. However, our investigation reveals an unusual phenomenon where exhibits weak interaction with the gold surface, hindering the formation of SAMs. To comprehend this unique behavior, we explore the impact of various experimental conditions, including temperature, immersion time, and concentration. Despite different combinations of variables, X-ray photoelectron spectroscopy (XPS) measurements show no sulfur signals, indicating the absence of a thiol monolayer on gold. This contrasts with conventional thiol-gold interactions and motivates further investigation.
We extend the study to copper and silver substrates, where 2PET displays strong affinity, forming well-defined monolayers. This observation highlights the complexity of thiol-metal interactions, influenced by factors beyond sulfur-metal bond strength. Micro contact printing and atomic force microscopy (AFM) analysis further validate the weak interaction between 2PET and gold, evidenced by the absence of well-defined patterns. To unravel the underlying causes, we propose utilizing controlled gold surface oxidation to modify surface properties and enhance 2PET adsorption capacity. Surface plasmon resonance (SPR) measurements will in-situ monitor adsorption kinetics in real time. Our findings provide insights into SAMs formation mechanisms and surface modification techniques. The knowledge gained can lead to the development of functionalized surfaces for biosensors, electronic devices, and nanotechnology. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-12-20T16:25:26Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2023-12-20T16:25:26Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | Verification Letter from the Oral Examination Committee i
Acknowledgements iii 摘要 v Abstract vii Contents ix List of Figures xiii List of Tables xvii Denotation xix Chapter 1 Introduction 1 1.1 Self-assembled monolayers . . . . . . . . . . . . . . . . . . . . . . 1 1.1.1 The self-assembly process . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Thiol monolayer and chain properties . . . . . . . . . . . . . . . . . 7 1.2.1 The relationship between chain length and monolayers . . . . . . . 7 1.2.2 Odd-even effect of monolayers . . . . . . . . . . . . . . . . . . . . 8 1.3 Thiol monolayer and metal oxide . . . . . . . . . . . . . . . . . . . 10 1.4 Kinetic of thiol monolayer formation . . . . . . . . . . . . . . . . . 11 1.5 Motivation and aims . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Chapter 2 Experimental Section 23 2.1 Materials and instrumentation . . . . . . . . . . . . . . . . . . . . . 23 2.1.1 Chemicals and surfaces . . . . . . . . . . . . . . . . . . . . . . . . 23 2.1.2 Electrochemical setup . . . . . . . . . . . . . . . . . . . . . . . . . 24 2.1.3 Atomic force microscope (AFM) . . . . . . . . . . . . . . . . . . . 26 2.1.4 X-ray photoelectron spectroscopy (XPS) . . . . . . . . . . . . . . . 27 2.1.5 Surface plasmon resonancey (SPR) . . . . . . . . . . . . . . . . . . 28 2.2 Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.2.1 SAMs preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.2.2 Microcontact printing (μCP) . . . . . . . . . . . . . . . . . . . . . 31 2.2.3 Forming gold oxide . . . . . . . . . . . . . . . . . . . . . . . . . . 32 2.2.4 Preparation of reduced gold surfaces . . . . . . . . . . . . . . . . . 33 2.2.5 Electrochemistry . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2.3 Data analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 2.3.1 XPS data analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 2.3.2 SPR data analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2.3.3 Estimation of gold oxide thickness . . . . . . . . . . . . . . . . . . 39 Chapter 3 Results and Discussion 41 3.1 Characterization of gold oxide layer . . . . . . . . . . . . . . . . . . 41 3.1.1 Electrochemical characterization of gold oxide layer . . . . . . . . . 42 3.1.2 Surfaces topography of oxide layer . . . . . . . . . . . . . . . . . . 44 3.2 Effect of gold oxide layer on thiols . . . . . . . . . . . . . . . . . . . 45 3.3 Adsorption kinetics of monolayers formation on gold surfaces . . . . 50 3.3.1 Effect of gold oxide layer on adsorption kinetics of monolayers . . . 50 Chapter 4 Conclusion 53 References 55 Appendix A — Acknowledgement 63 | - |
dc.language.iso | en | - |
dc.title | 研究氧化金上短鏈硫醇的表面相互作用和動力學 | zh_TW |
dc.title | Investigating the Interactions and Kinetics of Short-Chain Thiols on Oxidized Gold Surfaces | en |
dc.type | Thesis | - |
dc.date.schoolyear | 112-1 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 陳俊顯;廖尉斯;溫昱傑 | zh_TW |
dc.contributor.oralexamcommittee | Chun-Hsien Chen;Wei-Ssu Liao;Yu-Chieh Wen | en |
dc.subject.keyword | 自組裝單分子層,金表面氧化,化學分析電子能譜,表面電漿共振,吸附動力學, | zh_TW |
dc.subject.keyword | Self-assembled monolayers (SAMs),Gold surface oxidation,X-ray photoelectron spectroscopy (XPS),Surface plasmon resonance (SPR),Adsorption kinetic, | en |
dc.relation.page | 63 | - |
dc.identifier.doi | 10.6342/NTU202304267 | - |
dc.rights.note | 同意授權(全球公開) | - |
dc.date.accepted | 2023-10-03 | - |
dc.contributor.author-college | 理學院 | - |
dc.contributor.author-dept | 化學系 | - |
顯示於系所單位: | 化學系 |
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