具有光学增益的量子点微球复合体系制备
发布时间：2018-12-15 05:35
【摘要】：纳米材料因为其独特的特性而引起广泛的关注,其中的量子点(QDs)可用于生物标记和光电器件,太阳能电池以及环境工程等诸多领域。而硅球则是比较理想的载体,可以用于医学载体,高硅玻璃,结构陶瓷,色谱柱子等。但是普通纳米微米硅球的粒径和孔径比较小。将极小的硅球组装在大的基质上,则形成纳米微米复合材料则可以有效解决这个问题,并且可用其装载量子点,有潜在的激光发射应用前景。本文分为三部分,第一部分合成高质量的量子点。采用热注入法,通过改变反应时间和调整配体比例,以及更换反应原料,获得了红黄绿三种颜色的硒化镉(CdSe)量子点,并对其进行了无机壳层的生长。第二部分,研究了二氧化硅实心微球和多空微球的制备。制备出了粒径均匀,外观良好的大粒径(大于4 μm)和小粒径(约60nm)二氧化硅实心微球；并且又研究了以CTAB为模板剂制备多孔微球,着重考察了加入扩孔剂均三甲苯(TMB)和扩孔助剂正癸烷后对产品孔径的影响,得到了孔径约4nm的介孔二氧化硅球。第三部分,在前两部分的基础上,采用层层自组装(LBL)技术,将带负电荷的二氧化硅纳米球组装在聚二烯丙基二甲基氯化铵(PDDA)修饰过的带正电的PS大球上,合成了带有大粒径和大孔径的聚苯乙烯(PS)@二氧化硅核壳型微球。在LBL组装过程中,检测Zeta电势,粒径,微球外观以确保二氧化硅纳米球的成功组装。最终,含有5μm的PS实心核和350nm厚的二氧化硅多孔壳的核壳型微球用于负载如前所述的量子点,测试证明这种核壳型微球可以给量子点提供足够的空间,并且可能应用于纳米微米复合物的进一步研究中。
[Abstract]:Nanomaterials have attracted wide attention because of their unique properties. Quantum dot (QDs) can be used in many fields such as biomarkers, photovoltaic devices, solar cells and environmental engineering. The silica ball is an ideal carrier, which can be used as medical carrier, high silica glass, structural ceramics, chromatographic column and so on. However, the particle size and pore size of ordinary nanometer-sized silicon spheres are relatively small. The formation of nanometer-micron composites by assembling tiny silicon spheres onto large substrates can effectively solve this problem, and it can be used to load quantum dots, which has a potential prospect of laser emission applications. This paper is divided into three parts. The first part is the synthesis of high quality quantum dots. By changing the reaction time, adjusting the ratio of ligands and replacing the raw materials, (CdSe) QDs of red, yellow and green colors were obtained by thermal injection, and the hull-free QDs were grown. In the second part, the preparation of silica solid microspheres and multi-space microspheres were studied. Large (> 4 渭 m) and small (about 60nm) silica solid microspheres with uniform particle size and good appearance were prepared. The preparation of porous microspheres using CTAB as template was also studied. The effects of the addition of (TMB) and n-decane on the pore size of the product were investigated. The mesoporous silica spheres with a pore size of about 4nm were obtained. In the third part, on the basis of the first two parts, the negatively charged silica nanospheres were assembled on a positively charged PS ball modified by (PDDA). Polystyrene (PS) @ silica core-shell microspheres with large particle size and large pore size were synthesized. In the process of LBL assembly, Zeta potential, particle size and appearance of microspheres were detected to ensure the successful assembly of silica nanospheres. Finally, core-shell microspheres containing 5 渭 m PS solid nuclei and 350nm thick silica porous shells are used to load the previously described quantum dots. It is proved that the core-shell microspheres can provide sufficient space for quantum dots. And it may be used in the further study of nano-micron composites.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1
[Abstract]:Nanomaterials have attracted wide attention because of their unique properties. Quantum dot (QDs) can be used in many fields such as biomarkers, photovoltaic devices, solar cells and environmental engineering. The silica ball is an ideal carrier, which can be used as medical carrier, high silica glass, structural ceramics, chromatographic column and so on. However, the particle size and pore size of ordinary nanometer-sized silicon spheres are relatively small. The formation of nanometer-micron composites by assembling tiny silicon spheres onto large substrates can effectively solve this problem, and it can be used to load quantum dots, which has a potential prospect of laser emission applications. This paper is divided into three parts. The first part is the synthesis of high quality quantum dots. By changing the reaction time, adjusting the ratio of ligands and replacing the raw materials, (CdSe) QDs of red, yellow and green colors were obtained by thermal injection, and the hull-free QDs were grown. In the second part, the preparation of silica solid microspheres and multi-space microspheres were studied. Large (> 4 渭 m) and small (about 60nm) silica solid microspheres with uniform particle size and good appearance were prepared. The preparation of porous microspheres using CTAB as template was also studied. The effects of the addition of (TMB) and n-decane on the pore size of the product were investigated. The mesoporous silica spheres with a pore size of about 4nm were obtained. In the third part, on the basis of the first two parts, the negatively charged silica nanospheres were assembled on a positively charged PS ball modified by (PDDA). Polystyrene (PS) @ silica core-shell microspheres with large particle size and large pore size were synthesized. In the process of LBL assembly, Zeta potential, particle size and appearance of microspheres were detected to ensure the successful assembly of silica nanospheres. Finally, core-shell microspheres containing 5 渭 m PS solid nuclei and 350nm thick silica porous shells are used to load the previously described quantum dots. It is proved that the core-shell microspheres can provide sufficient space for quantum dots. And it may be used in the further study of nano-micron composites.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1
【相似文献】
相关期刊论文 前10条
1 季雷华;高素莲;张斌;;量子点的合成、毒理学及其应用[J];环境化学;2008年05期
2 王富;刘春艳;;发光碳量子点的合成及应用[J];影像科学与光化学;2011年04期
3 伊魁宇;王猛;邵明云;;量子点作为离子探针的分析应用[J];广州化工;2012年11期
4 罗慧;李曦;方婷婷;刘鹏;;量子点的毒性研究进展[J];材料导报;2013年19期
5 田瑞雪;武玲玲;赵清;胡胜亮;杨金龙;;碳量子点的氨基化及其对发光性能的影响[J];化工新型材料;2014年01期
6 ;“量子点”晶体将推动部分物理工艺的进步[J];光机电信息;2002年10期
7 徐万帮;汪勇先;许荣辉;尹端l，
本文编号：2380075
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2380075.html
