本文選題：納米材料 + 拓撲絕緣體�。� 參考：《湘潭大學》2015年碩士論文

【摘要】：納米材料研究的范圍非常廣,內容涵蓋非常豐富,其研究領域從原子團到納米顆粒、納米線再延續(xù)到發(fā)展超薄二維納米結構材料。既石墨烯之后,拓撲絕緣體(TI)作為新型的量子功能性材料,引起了廣大國內外學者們的關注和研究,并且一批重要的研究成果相繼被發(fā)表。我們的工作主要是針對拓撲絕緣體(TI)Bi2Se3材料,在Bi2Se3納米片以及Ag/Bi2Se3復合結構的制備、形貌結構的表征和光響應特性能測試方面展開了比較系統(tǒng)的工作。全文共分為五章:第一章介紹了石墨烯、過渡金屬二硫族化合物以及拓撲絕緣體材料等二維原子晶體材料的常用制備方法、性質特征以及應用領域,分析了目前仍然存在的問題以及未來的發(fā)展動態(tài)。第二章采用Li離子插入的溶液水熱反應成功制備獲得了Bi2Se3納米片結構以及對其進行各項表征,測試結果表明我們成功剝離獲得了厚度可達2-3 nm的單晶Bi2Se3納米片結構。第三章介紹了塊體Bi2Se3、Bi2Se3納米片結構以及經(jīng)退火處理后的Bi2Se3納米片結構的光響應性能研究,測試分析了它們的光響應性能的表現(xiàn)。第四章研究了以硒化鉍納米片為載體,通過實驗制備獲得Ag/Bi2Se3納米復合結構,另外,對Bi2Se3納米片結構以及Ag/Bi2Se3復合結構進行了系統(tǒng)性的性能對比測試,發(fā)現(xiàn)Ag/Bi2Se3復合結構顯示出非常顯著的光響應特性。第五章總結了本人在碩士期間的主要研究方向和已取得的重要成果,并對目前還有待完善的工作以及可開辟的新領域進行了展望。
[Abstract]:The research scope of nanomaterials is very wide and the content is very rich. The research fields of nanomaterials are from atomic clusters to nanoparticles and nanowires to the development of ultrathin two-dimensional nanostructured materials.After graphene topology insulator tii as a new quantum functional material has attracted the attention and research of scholars at home and abroad and a number of important research results have been published one after another.Our work is mainly focused on the preparation of Bi2Se3 nanocrystalline and Ag/Bi2Se3 composite structures, the characterization of morphology and the special properties of photo-response for topologically insulator TiTiBi2Se3.The thesis is divided into five chapters: in Chapter 1, the preparation methods, properties and applications of graphene, transition metal disulfide compounds and topological insulator materials are introduced.The existing problems and the future development are analyzed.In chapter 2, the structure and characterization of Bi2Se3 nanocrystals were successfully prepared by hydrothermal reaction of Li ion insertion solution. The results show that we successfully peel off the structure of Bi2Se3 nanocrystals with thickness up to 2-3 nm.In chapter 3, the photoresponse properties of bulk Bi2Se3OBi2Se3 nanostructures and annealed Bi2Se3 nanostructures are introduced, and their optical response properties are tested and analyzed.In chapter 4, the Ag/Bi2Se3 nanocomposite structure was prepared by using bismuth selenide nanoparticles as the carrier. In addition, the Bi2Se3 nanostructures and the Ag/Bi2Se3 nanostructures were systematically compared with each other.It is found that the composite structure of Ag/Bi2Se3 exhibits very remarkable light response characteristics.The fifth chapter summarizes the main research direction and the important achievements made during my master's period, and looks forward to the work to be improved and the new field to be opened up at present.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB383.1

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