本文選題：低維材料 + 石墨烯量子點�。� 參考：《蘭州大學》2015年碩士論文

【摘要】：本論文所涉及的研究工作圍繞低維碳材料的合成與應用展開。首先探索了了石墨烯量子點的合成及其在生物成像、光電轉(zhuǎn)換領域的應用。在此基礎上,將工作拓展到碳化鈦納米片的合成與表征,并探討了其在非線性光學領域的應用。主要研究內(nèi)容包括：1.提出了一種方便新穎的具有普遍適用性的石墨烯量子點制備方法。通過在固相條件下使用不同化學組成的有機小分子作為前體來合成不同化學摻雜的石墨烯量子點。該方法制得的石墨烯量子點具有熒光量子產(chǎn)率高、酸堿耐受性強、細胞毒性低等優(yōu)勢,這使得其在有望在生物標記和光電應用等領域發(fā)揮重要作用。同時證明,這種石墨烯量子點的制備方法可以廣泛應用于各種反應前體,開創(chuàng)了一種合理設計、低成本生產(chǎn)不同摻雜石墨烯量子點的新方法。2.利用瓊脂糖凝膠電泳技術有效地分離純化了石墨烯量子點和碳量子點。并對分離純化產(chǎn)物進行了系統(tǒng)的表征,進而對固相法熱解小分子制備石墨烯量子點的機理進行了確認,另一方面也探究了各個組分的熒光性質(zhì)。3.用簡易可行的溶液超聲輔助分散法制備了一種新型的二維材料TiC納米片。并研究了該材料在532 nm波長激光下的非線性光學性質(zhì)。Z-掃描結(jié)果顯示相比于MoS2, TiC納米片展現(xiàn)出更加吸引人的飽和吸收性質(zhì)。研究表明,以ITO為基底,通過電沉積方法制備的TiC/ITO復合物可以作為一類新型的具有極大應用潛力的非線性光學材料。
[Abstract]:This paper focuses on the synthesis and application of low-dimensional carbon materials.Firstly, the synthesis of graphene quantum dots and their applications in the field of biological imaging and photoelectric conversion are explored.On this basis, the work is extended to the synthesis and characterization of titanium carbide nanocrystals, and its application in nonlinear optics is discussed.The main research contents include: 1.A novel and convenient method for the preparation of graphene quantum dots with universal applicability is proposed.Different chemically doped graphene quantum dots were synthesized by using organic small molecules with different chemical composition as precursors under solid state conditions.The graphene quantum dots prepared by this method have the advantages of high fluorescence quantum yield, strong acid-base tolerance and low cytotoxicity, which make them play an important role in biomarker and optoelectronic applications.At the same time, it is proved that the preparation method of graphene quantum dots can be widely used in various reaction precursors, and a new method of producing different doped graphene quantum dots with reasonable design and low cost has been created.Graphene quantum dots and carbon quantum dots were effectively separated and purified by agarose gel electrophoresis.The mechanism of preparing graphene quantum dots by solid phase pyrolysis of small molecules was confirmed. On the other hand, the fluorescence properties of each component were also investigated.A new two-dimensional TiC nanocrystalline was prepared by a simple and feasible solution ultrasonic assisted dispersion method.The nonlinear optical properties of the material at 532nm laser. Z- scanning results show that the TiC nanocrystals exhibit more attractive saturated absorption properties than those of MoS2.The results show that the TiC/ITO composite prepared by electrodeposition on ITO substrate can be used as a new type of nonlinear optical material with great application potential.
【學位授予單位】：蘭州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ127.11

【共引文獻】

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2 程浩;金納米材料表面配體修飾的原位同步輻射研究[D];中國科學技術大學;2015年

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1 黃靜偉;基于納米線/片的非酶葡萄糖傳感器研究[D];蘭州大學;2014年

2 李爽;石墨烯基二維復合材料的可控合成及其在能源材料中的應用[D];上海交通大學;2014年

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本文編號：1758412