水溶液法制备ZnO纳米结构及其性质研究
发布时间：2018-11-03 08:08
【摘要】：ZnO是一种多功能宽带隙(3.37 eV)半导体,具有纤锌矿晶体结构,室温下具有较高的激子束缚能(60 meV),能够实现的受激发射。ZnO具有许多特殊的性质,具有较高的电子迁移率、良好的压电性和荧光性,被广泛应用于发光二级管、场效应晶体管、气敏传感器、太阳能电池和光催化等领域。目前人们将纳米加工与随后的生长技术相结合制备具有特殊功能的一维有序纳米阵列成为当前纳米科技领域的研究热点。主要集中在实现一维有序ZnO纳米结构的低成本、大面积制备并对其生长位置、尺寸、方向和均一性进行有效调控。本论文采用自组装微纳米球印刷与反应离子刻蚀相结合制备图案化的模板,通过水溶液法在模板上制备图案化的ZnO纳米结构；利用扫描电子显微镜(SEM)、FLS920型荧光光谱仪和Maya-2000-Pro型紫外可见分光光度计等仪器对样品的表面形貌和光学性能进行了表征,探讨了不同形貌模板及水溶液生长条件对ZnO纳米结构的影响。主要研究内容如下：1,点阵结构的ZnO纳米阵列制备：以带有ZnO种子层的硅(100)基片为基础,重点研究了聚苯己烯球自组装技术制备六角点阵结构模板的方法,并探讨了水溶液生长条件对制备大面积六角点阵结构的ZnO纳米棒阵列的影响。研究结果显示,聚苯乙烯微球的尺寸和反应离子刻蚀参数是影响六角点阵结构模板的关键,而水溶液生长条件对ZnO纳米结构的形貌有重要影响。此外,我们还测量了ZnO纳米棒阵列的室温光致荧光光谱,探讨了ZnO纳米棒的直径对紫外发光峰位的影响。2,ZnO纳米花阵列制备：通过在带有自组装聚苯乙烯球单层膜的硅(100)基片上沉积ZnO种子层的方法制备了球形及环形点阵模板,进而制备了具有周期结构的海胆状ZnO纳米花阵列和ZnO纳米花环状点阵。以亚甲基蓝水溶液为降解物,比较了不同形貌的ZnO纳米棒阵列的光降解能力,发现单位基片面积上ZnO纳米棒的有效受光面积是影响ZnO纳米棒阵列光降解能力的重要因素。
[Abstract]:ZnO is a multifunctional wide band gap (3.37 eV) semiconductor with wurtzite crystal structure and high exciton binding energy (60 meV),). ZnO has many special properties. Because of its high electron mobility, good piezoelectric and fluorescence properties, it has been widely used in the fields of light emitting secondary tubes, field effect transistors, gas sensors, solar cells and photocatalysis. At present, the synthesis of one-dimensional ordered nanoarrays with special functions by combining nanoprocessing with subsequent growth techniques has become a research hotspot in the field of nanotechnology. It mainly focuses on the realization of one-dimensional ordered ZnO nanostructures with low cost, large area preparation and effective control of their growth location, size, direction and uniformity. In this thesis, the patterned ZnO nanostructures were prepared on the template by self-assembled microsphere printing and reactive ion etching. The surface morphology and optical properties of the samples were characterized by scanning electron microscope (SEM) (SEM), FLS920 fluorescence spectrometer and Maya-2000-Pro UV-Vis spectrophotometer. The effects of different morphology templates and aqueous solution growth conditions on ZnO nanostructures were investigated. The main research contents are as follows: 1. Preparation of ZnO nanoarrays with lattice structure: based on silicon (100) substrate with ZnO seed layer, the method of fabricating hexagonal lattice structure template by self-assembly of polyphenylhexene spheres was studied. The effect of the growth conditions of aqueous solution on the preparation of ZnO nanorod arrays with large hexagonal lattice structure was investigated. The results show that the size of polystyrene microspheres and the etching parameters of reactive ions are the key factors affecting the template of hexagonal lattice structure, and the growth conditions of aqueous solution have an important effect on the morphology of ZnO nanostructures. In addition, we also measured the photoluminescence spectra of ZnO nanorod arrays at room temperature, and discussed the influence of the diameter of ZnO nanorods on the UV luminescence peak. Preparation of ZnO nanoscale arrays: spherical and annular lattice templates were prepared by depositing ZnO seed layer on silicon (100) substrates with self-assembled polystyrene ball monolayers. Furthermore, sea urchin-like ZnO nano-flower array and ZnO nano-flower ring lattice with periodic structure were prepared. The photodegradation ability of ZnO nanorod arrays with different morphologies was compared with methylene blue aqueous solution. It was found that the effective light-receiving area of ZnO nanorods in unit substrate area was an important factor affecting the photodegradation ability of ZnO nanorod arrays.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O614.241
本文编号：2307211
[Abstract]:ZnO is a multifunctional wide band gap (3.37 eV) semiconductor with wurtzite crystal structure and high exciton binding energy (60 meV),). ZnO has many special properties. Because of its high electron mobility, good piezoelectric and fluorescence properties, it has been widely used in the fields of light emitting secondary tubes, field effect transistors, gas sensors, solar cells and photocatalysis. At present, the synthesis of one-dimensional ordered nanoarrays with special functions by combining nanoprocessing with subsequent growth techniques has become a research hotspot in the field of nanotechnology. It mainly focuses on the realization of one-dimensional ordered ZnO nanostructures with low cost, large area preparation and effective control of their growth location, size, direction and uniformity. In this thesis, the patterned ZnO nanostructures were prepared on the template by self-assembled microsphere printing and reactive ion etching. The surface morphology and optical properties of the samples were characterized by scanning electron microscope (SEM) (SEM), FLS920 fluorescence spectrometer and Maya-2000-Pro UV-Vis spectrophotometer. The effects of different morphology templates and aqueous solution growth conditions on ZnO nanostructures were investigated. The main research contents are as follows: 1. Preparation of ZnO nanoarrays with lattice structure: based on silicon (100) substrate with ZnO seed layer, the method of fabricating hexagonal lattice structure template by self-assembly of polyphenylhexene spheres was studied. The effect of the growth conditions of aqueous solution on the preparation of ZnO nanorod arrays with large hexagonal lattice structure was investigated. The results show that the size of polystyrene microspheres and the etching parameters of reactive ions are the key factors affecting the template of hexagonal lattice structure, and the growth conditions of aqueous solution have an important effect on the morphology of ZnO nanostructures. In addition, we also measured the photoluminescence spectra of ZnO nanorod arrays at room temperature, and discussed the influence of the diameter of ZnO nanorods on the UV luminescence peak. Preparation of ZnO nanoscale arrays: spherical and annular lattice templates were prepared by depositing ZnO seed layer on silicon (100) substrates with self-assembled polystyrene ball monolayers. Furthermore, sea urchin-like ZnO nano-flower array and ZnO nano-flower ring lattice with periodic structure were prepared. The photodegradation ability of ZnO nanorod arrays with different morphologies was compared with methylene blue aqueous solution. It was found that the effective light-receiving area of ZnO nanorods in unit substrate area was an important factor affecting the photodegradation ability of ZnO nanorod arrays.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O614.241
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