Fabrication of Gold Nanoparticle-Doped Zeolite L Crystals and Characterization by Optical Microscopy: Laser Ablation- and Crystallization Inclusion-Based Approach
Fabrication of Gold Nanoparticle-Doped Zeolite L Crystals and Characterization by Optical Microscopy: Laser Ablation- and Crystallization Inclusion-Based Approach
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DOI：
10.1021/jp8063189
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发表时间：
2008-09
影响因子：
3.7
通讯作者：
S. Hashimoto;T. Uwada;H. Masuhara;T. Asahi
中科院分区：
文献类型：
--
作者：
S. Hashimoto;T. Uwada;H. Masuhara;T. Asahi
本文报道了采用激光烧蚀和结晶包合两种关键技术制备的金纳米掺杂L型沸石晶体的光学显微镜表征。前者允许在合成凝胶中稳定形成Au NP，而后者允许超过沸石晶体的孔开口的Au NP的包封，仍然保持作为整体的晶体结构。利用单粒子光散射光谱和成像技术进行显微表征，该技术提供晶体内单个Au粒子的瑞利散射图像和归因于嵌入的Au NPs的表面等离子体共振带的散射光谱。这是一个独特的示范应用的激光烧蚀诱导纳米粒子在解决方案中的实际用途，用于制造纳米复合材料。此外，目前的结果表明，暗场显微镜是能够可视化的金属纳米粒子小到40 nm的直径限制在光散射结晶介质。
This letter reports the optical microscopy characterization of gold nanoparticle-doped zeolite L crystals prepared by applying two key techniques: laser ablation and crystallization inclusion. The former allowed the stable formation of Au NPs in the synthesis gel, while the latter permitted the encapsulation of Au NPs exceeding the pore openings of the zeolite crystals, still maintaining the crystal structure as a whole. The microscopy characterization was performed by exploiting single particle light scattering spectroscopy and imaging techniques which offered the Rayleigh scattering images of individual Au particles within the crystals and the scattering spectra ascribable to the surface plasmon resonance band of Au NPs embedded. This is a unique demonstration for the application of laser ablation-induced NPs in solution to practical use for fabricating a nanocomposite material. Furthermore, the present results revealed that the dark field microscopy is capable of visualizing metal nanoparticles as small as 40 nm diameter confined in the light scattering crystalline medium.