本文選題：光熱治療　切入點：發(fā)光二極管　出處：《吉林大學》2015年博士論文

【摘要】：近幾十年來，復合材料的制備與表征得到了化學、物理以及材料科學家們的極大關注，他們對研發(fā)具有獨特物理性質的新材料等方面尤為感興趣。今天，與功能復合材料制備相關的化學研究已經(jīng)取得了大量令人矚目的科研成就。尤其是在物理和化學兩門學科的交叉研究中起到了極為重要的銜接作用的納米技術，已被廣泛應用于醫(yī)藥、能源、生物等各個學科之中，尤其是納米復合材料的構筑技術方面，取得許多先進的科研成果。例如在光熱治療方面(photothermal therapy，，PTT)，研究者們通過將物理與化學手段相結合，研發(fā)出了光熱治療法。該方法借助某些納米粒子所具有的近紅外光熱轉換性質，將納米粒子注入腫瘤細胞之中，通過近紅外激光照射，以高溫殺死腫瘤細胞。目前這種方法已在動物試驗中取得了成功，由此延伸出來的關于具有光熱轉換性質的納米粒子的探索研究也在不斷進行和完善中。以納米粒子制備新型節(jié)能器件也是材料化學中一個重要的組成部分，其中以熒光納米粒子制備發(fā)光二極管(light-emitting diode，LED)是最近新興的一個領域，LED具有亮度高、耗能低、壽命長等優(yōu)點，具有替代傳統(tǒng)光源的優(yōu)勢，因此制備出高效、穩(wěn)定、適用于LED器件的熒光納米材料，是極其必要的。本論文從制備光熱納米結構和熒光納米結構兩方面出發(fā)，探索納米復合結構的構筑機理，由此開發(fā)出新型納米復合材料，使之可被實際應用于光熱治療和LED器件當中。 第二章中，我們在常溫條件下合成了具有光熱性質的水相CuS納米復合結構，通過對不同時間內CuS形貌的監(jiān)控，對這種復合結構的形成機理進行了深刻的闡述，證明了這種CuS具有階梯式組裝方式，而其產(chǎn)生的原因是小的顆粒間的弱相互作用，這種弱相互作用包括偶極引力、靜電斥力以及范德華力；隨后我們又對這種CuS復合結構在不同階段、不同條件下的產(chǎn)物的光熱性質進行了深入研究，證明了其光熱性質與復合材料的結構息息相關，即有序的高度組裝復合結構具有最好的光熱性能。 第三章中，我們制備了基于水相CdTe量子點的組裝材料，并將它們應用于LED顏色轉換層中，進而制備出高亮度的白光LED光源。首先，我們利用室溫肼促進生長的方法制備水相CdTe量子點，該方法簡單快捷，并利用各種表征方法對其測試。隨后，我們成功將CdTe量子點與CaCO3無機鹽進行復合得到了一種新的具有強熒光的復合材料，復合提高了CdTe量子點的穩(wěn)定性，避免了能量轉移的發(fā)生，克服了以往合成量子點與聚合物復合材料中量子效率被破壞的問題。并進一步用這種復合材料制備出高色純度的LED光源以及白光LED光源。 第四章中，我們首先制備出了具有黃綠熒光的親水性聚合物點，為了防止其在白光LED應用中由于聚集導致難以分散在交聯(lián)劑中，并且產(chǎn)生熒光猝滅，我們利用有機溶劑的雙溶劑法，將聚合物點與惰性介質——超細SiO2進行復合，將SiO2包覆在聚合物點團聚體的表面，并由此深入研究了雙溶劑法對這種復合結構的構筑機理，又通過對聚合物點與SiO2的不同比例進行對照，最后得出了能夠使得復合結構熒光最佳的反應條件；隨后我們將制備的復合結構成功應用在了白光LED的制備當中，所得的白光LED發(fā)光器件其光色基本達到了純粹白光的要求，這為低毒性、低投入的碳材料的實際應用增加了新的可能。
[Abstract]:In recent years, the preparation and characterization of composite materials has been of great concern and physical chemistry, material scientists, they have unique physical properties for the research and development of new materials and other aspects are particularly interested in. Today, with the function of chemical preparation related composite materials has made a lot of achievements in scientific research. Especially remarkable interdisciplinary research in physics and chemistry of two disciplines plays an important role of nanotechnology, has been widely used in medicine, energy, biology etc. among various disciplines, especially the technology of constructing nano composite material, has many advanced scientific research. For example in the aspects of photothermal therapy (photothermal therapy, PTT), the researchers by physical and chemical methods combined, developed photothermal therapy. The method using near infrared photothermal nanoparticles has certain conversion properties The injection of tumor cells, nanoparticles, by near infrared laser irradiation, high temperature to kill tumor cells. This method has achieved success in the animal experiment, study on photothermal conversion properties of the nanoparticles has extended from which is also ongoing and perfected. The preparation is an important part of new energy saving device is the material chemistry in nanoparticles, the fluorescent nanoparticles prepared light-emitting diode (light-emitting diode LED) is an emerging field recently, LED has high brightness, low energy consumption, long life and other advantages, has replaced the traditional light source, and the preparation of efficient, stable, fluorescent nano materials suitable for use in LED the device, is very necessary. This paper from the preparation of nano structure and nano structure of fluorescent light two aspects, to explore and build the mechanism of nano composite structure, which opened The new nano composite material can be applied to photothermal therapy and LED devices.
In the second chapter, we synthesized aqueous CuS nano composite structure with thermal properties under normal temperature conditions, by monitoring the morphology of CuS in different time. The formation mechanism of the composite structure is elaborated and proved that the CuS has a ladder type assembling mode, and its reason is the weak interaction of small between the particles, the weak interaction including dipole attraction, electrostatic repulsion and Fan Dehua force; then we went on the CuS composite structure in different stages, thermal properties of products under different conditions are studied and proved its structure is closely related to thermal properties and composite materials, which is highly ordered structure with composite assembly the best thermal performance.
In the third chapter, we prepared the assembled materials based on aqueous CdTe quantum dots, and applying them to the LED color conversion layer, and then prepared high brightness white LED light source. First of all, we use room temperature hydrazine promote the growth of the preparation methods of aqueous CdTe quantum dots, the method is simple and efficient, and the use of various characterization methods on the test. Then, we successfully CdTe quantum dots and CaCO3 inorganic salt composite has been a strong fluorescence of new composite materials, composite to improve the stability of CdTe quantum dots, avoid the occurrence of energy transfer, overcome the previous synthesis of quantum dots and quantum efficiency of the polymer composite material was destruction of the problem. Furthermore, the composite material of high color purity of LED light source, white LED light source.
In the fourth chapter, we first prepared a hydrophilic polymer with yellow green fluorescence, in order to prevent the white LED applications due to the aggregation makes it difficult to disperse in the crosslinking agent, and fluorescence quenching, we use double solvent method of organic solvent, the polymer with inert medium ultrafine SiO2 composite will the surface of SiO2 coating in polymer aggregates, and then studied on the construction mechanism of the composite structure of the double solvent method were compared by different ratio of polymer and SiO2, finally makes the composite structure optimum reaction conditions of fluorescence; then we were successfully applied in the preparation of composite structure in white light. The preparation of LED, the white LED light emitting device the light has basically reached the requirements of the pure white light, low toxicity, the application of low input of carbon materials A new possibility.

【學位授予單位】：吉林大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TB383.1;TB33

【共引文獻】

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