【作者】 杨秉杰；

【导师】 吕男； 迟力峰；

【作者基本信息】 吉林大学 ， 物理化学， 2010， 博士

【摘要】 表面等离子体共振是金属纳米结构非常独特的光学特性,基于纳米结构的表面等离子体共振研究已成为国际上热门研究领域之一,即表面等离子激元学。它包含了广泛的研究内容,如:表面电磁场增强、表面增强光谱、光透射增强、表面等离子体纳米波导、表面等离子体光催化、表面增强的能量转移及选择性光吸收等方面。这类研究展示了巨大的应用前景,有望为新一代的纳米表征技术和传感器技术提供新的原理和方法。这些技术将成为发展超高检测灵敏度的新型表面等离子体、表面增强光谱传感器的基础。基于这种背景下,本论文开展了表面等离子激元学的基础研究,提出了构筑表面等离子共振材料的新方法,把表面等离子共振应用于纳米粒子和纳米粒子阵列的领域中,探索了其在电化学、拉曼增强和荧光增强等方面的应用。本论文详细介绍了研究进展,具体研究内容如下:1.创立了通过动力学方法,实现了不同形貌纳米粒子的控制合成,并探索了纳米粒子在溶液法合成过程中进化过程的内部因素,发现了纳米粒子可控合成的另一条途径。此外,我们对不同形貌的纳米粒子进行了光学和电化学的初步研究,实现了表面等离子共振的实际应用。2.我们创立了通过纳米压印技术同电化学沉积相结合构筑有序纳米粒子阵列的方法。该方法可以原位大面积地合成纳米粒子,可在同一基底上实现不同结构纳米粒子阵列的一次性构筑。利用这种方法,银纳米粒子的有序阵列被高效地构筑出来,其纳米粒子的密度具有可调性。我们系统研究了这种密度可调的特性,揭示了产生这种特性的原因,成功地将其应用至拉曼增强和荧光增强的领域中,并对增强机理进行了研究,取得了的研究成果。本论文提出了构筑等离子共振材料的新方法,并实现了等离子共振性质在纳米粒子和纳米粒子阵列领域的应用。基于这些方法可以廉价、高效的大面积构筑等离子共振材料。与传统方法相比,大大降低了生产成本,为等离子共振在光学,电子以及器件和传感领域的应用,奠定了基础。更多还原

【Abstract】 Surface plasmon resonance is a unique property on metallic nanostructures. Surface plasmon resonance based on Nanostructured system, namely plasmonic optics, becomes one of the focused fields. It contains many research areas: enhanced local field, enhanced emission, enhanced transmission; plasmon waveguide; plasmon photocatalyse; plasmon enhanced energy transfer and selected absorption. Many new phenomena and questions have been found during the research process and many potential applications have been proposed,such as ultrahigh sensitive detection and new kind of sensor based on the enhanced spectra.In our work. Plasmonic nanostructures have been fabricated successfully and its electrochemical property, surface enhanced Ramon scattering and metal enhanced fluoresce o were studied for plasmonc application.1. A simple method of controlling gold nanoparticle shapes by dynamic process was proposed and the mechanismof morphological evolution process was also presented. It is an alternative route for synthesis nanoparticle with different shape control. This is the first report on the dynamic process control on the shape of nanoparticles. It is a kind of“green chemistry”method to synthesize the gold nanoparticles. The electrochemical properties and optical properties of the gold nanoparticles with different shapes are studied. 2. A nonel method of fabricating the arrays of silver nanoparticles (SNPs) on predefined positions by electrochemical deposition (ECD) combined with nanoimprint lithography (NIL). The SNPs assemble, especially the density, can be controlled by varying the pattern design and the preparation conditions. By this approach, various arrays of SNPs with feature size down to sub-micrometer can be fabricated over several square centimeters on one substrate. In this thesis, the density tunable properties are systematically studied and reviewed the inner reason. The SNPs arrays can be applied in detecting and sensing fields and surface-enhanced Raman scatter and metal enhance fluoresce are carefully studied and gained good results.Herein we originally demonstrated the methods for fabricating surface plasmon resonance nanostructures. These methods make the Surface plasmon resonance property application in the field of nanoparticle and nanoparticle arrays areas. This may allow a novel and simple route to fabricate large-area surface plasmon resonance materials. Comparing with traditional methods, the low cost is the basement for the Surface plasmon resonance property widely application.更多还原