本文關(guān)鍵詞： 碳量子點(diǎn) 電化學(xué)法 鐵離子檢測(cè) 細(xì)胞成像　出處：《青島大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：碳量子點(diǎn)(Carbon quantum dots,CQDs)是近十年發(fā)展起來(lái)的碳納米材料,尺寸在10 nm以下,在水介質(zhì)中具有非常好的分散性、化學(xué)惰性高、低的細(xì)胞毒性、表面基團(tuán)容易功能化、抗光漂白性、光穩(wěn)定性高等優(yōu)異性能,是碳納米家族中的冉冉升起的一顆耀眼的明星。通過(guò)研究者的不斷深入的研究,最近幾年的研究報(bào)道了越來(lái)越多的碳量子點(diǎn)的應(yīng)用涉及到生物成像方面、電光催化、光伏電池、生物-化學(xué)傳感器等諸多領(lǐng)域。這些都說(shuō)明碳量子點(diǎn)具有非常重要的潛在的應(yīng)用價(jià)值。隨著研究的不斷深入合成碳量子點(diǎn)的方法越來(lái)越多,包括電化學(xué)法、水熱法、微波法等等。然而復(fù)雜的合成過(guò)程以及必須用含有碳源的材料做電極才能制備碳量子點(diǎn)。本文主要研究了碳量子點(diǎn)的兩種制備方法及其在鐵離子檢測(cè)和細(xì)胞成像方面的應(yīng)用。第一種方法是,我們發(fā)明了基于一種使用不含碳的電極的電化學(xué)方法來(lái)制備固體量子點(diǎn)。乙腈和少量的離子液體混合液作為電解液,兩個(gè)鉑片電極作正負(fù)極,在10 V的恒電壓下12小時(shí)即可得到固體的碳量子點(diǎn)。這種方法所制備的碳量子點(diǎn),避免了后期復(fù)雜的提純過(guò)程,直接真空抽濾,并在真空干燥箱里60攝氏度干燥1個(gè)小時(shí)即可得到純凈的固體量子點(diǎn)。第二種方法是簡(jiǎn)單高效的自下而上的電化學(xué)方法以氨基酸最為前軀體來(lái)制備多功能的氮摻雜的碳量子�；谌姌O電化學(xué)分析體系,不僅可以得到水溶性較好,熒光強(qiáng)度較高電化學(xué)的發(fā)光穩(wěn)定的氮摻雜的碳量子溶液,而且還直觀的通過(guò)電流電壓曲線可以得到最大的量子產(chǎn)率。通過(guò)高分辨投射電鏡、原子力顯微鏡、傅里葉紅外光譜以及X射線光電子能譜分析等對(duì)兩種方法得到的碳量子點(diǎn)進(jìn)行了全面系統(tǒng)的表征,結(jié)果表明得到的碳量子點(diǎn)表面含有豐富的含氧官能團(tuán)羧基和羥基,因此具有極好的水溶性,以及優(yōu)良的熒光特性。
[Abstract]:Carbon quantum dots (Carbon quantum, dots, CQDs) is the carbon nano materials developed in recent ten years, the size below 10 nm in aqueous medium has good dispersion, high chemical inertness, low cytotoxicity, easily functionalized surface groups, anti photobleaching, light stability and high performance is the family of carbon nano, the rising of a dazzling star. Through the in-depth research of the researchers, research in recent years reported the application of carbon quantum dots are more and more involved in biological imaging, electro catalysis, photovoltaic cells, bio - chemical sensor fields. These are examples of carbon quantum dots have important potential application value. With the deepening of the research methods of synthesis of carbon quantum dots is more and more, including electrochemical method, hydrothermal method, microwave method and so on. However, the process of compounding and must contain carbon The source electrode material to prepare carbon quantum dots. This paper mainly studies two methods of preparation of carbon quantum dots and its application in iron ion detection and cell imaging. The first method, we developed a method of electrochemical electrode using carbon based solid preparation of quantum dots. A mixture of acetonitrile and ionic liquids as electrolyte, two platinum electrode as anode, at a constant voltage of 10 V 12 hours to get a solid carbon quantum dots. This method of carbon quantum dots prepared by the process of purification, avoid complex post, direct vacuum filtration, and a vacuum drying box in 60 degrees Celsius dry for 1 hours to obtain a solid quantum dot. The second method is pure carbon quantum electrochemistry method is simple and efficient bottom-up with the precursor amino acids to nitrogen doped multi function. Based on the three electrode The electrochemical analysis system, not only can get better water solubility and high carbon quantum fluorescence electrochemical luminescence stability of nitrogen doping, but also directly through the current voltage curve can be obtained. The maximum quantum yield by high resolution transmission electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy and X ray photoelectron carbon quantum by the two methods of spectrum analysis were characterized systematically, the results showed that the surface of carbon quantum dots obtained with oxygen functional groups of carboxyl and hydroxyl containing abundant, so it has excellent water solubility and excellent fluorescent properties.

【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB383.1;O613.71

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