摘要
Since the EPR investigation of carbon nanotubes has not been consistent, this thesis is probed into the origin of spin characters of carbon nanotubes and its defects via EPR measurement. Besides, the composite of carbon nanotubes is also studied. In Chapter 1 Introduction, the content includes the fundamental of carbon nanotubes: the basic structures, physical properties, synthesis, functionalization, and surface modification of carbon nanotubes; the instruments applied in our study: the working principal of instruments; and the literature review: review previous EPR studies of carbon nanotubes. In Chapter 2 Motive, the research purpose and the novelty of this thesis are shown. In Chapter 3 Experiment Method, the synthesis procedure, chemicals used in our research and instruments are presented are listed. In Chapter 4 Results and Discussion, there are three parts: Section 4-1 shows the results by acid-treatment. The information of the morphology, the composition, the structure and the chemical bonding is presented. Section 4-2 aims to explain the spin characters of carbon nanotube by EPR profile and relative results. Relationship of paramagnetism and defects of carbon nanotubes is deeply studied as well as graphite is chosen as control experiments. Section 4-3 mainly focuses on the performance and the paramagnetism of CNT/PVA composite via EPR and SQUID. The influence of polymer (PVA) to magnetic properties and electronic behavior of carbon nanotubes is analyzed via compared the samples without polymer coating. Finally is Chapter 5 Conclusion, the results of the above measurement is concluded.
並列摘要
鑒於目前奈米碳管於電子順磁共振上的研究並無一致的結果，本論文將著重於探討奈米碳管本身及其缺陷所具有之電子自旋性質。此外也將探討奈米碳管與聚乙烯醇所組成複合材於電子順磁共振下的表現。第一章包含概括的碳管結構、性質、合成及儀器原理，進階的表面改質、官能基化及文獻回顧。第二章則是實驗動機，解釋目前此領域的現況及本論文的新穎性。第三章列出實驗所需物品、儀器以及步驟流程。第四章提及量測結果與討論，從中我們研究奈米碳管的官能基化，了解其並不隨酸處理時間而改變。然而在電子順磁共振下官能基化的奈米碳管展現出不同的順磁性質，使我們更清楚認知奈米碳管及其缺陷的電子結構。奈米碳管與聚乙烯醇合成的複合材料在電子順磁共振下的表現也會提及，這能幫助我們對奈米碳管及其複合材料在電子順磁共振的研究下有更全盤的認識。而最後第五章則是本論文的結論。
參考文獻
延伸閱讀
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