Hierarchically Organized Nanoparticle Mesostructure Arrays Formed through Hydrothermal Self-Assembly

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• 作者：Adam Wright ; John Gabaldon ; D. Bruce Burckel ; Ying-Bing Jiang ; Z. Ryan Tian ; Jun Liu ; C. Jeffrey Brinker ; and Hongyou Fan
• 刊名：Chemistry of Materials
• 出版年：2006
• 出版时间：June 27, 2006
• 年：2006
• 卷：18
• 期：13
• 页码：3034 - 3038
• 全文大小：319K
• 年卷期：v.18,no.13(June 27, 2006)
• ISSN：1520-5002

文摘

We report a new self-assembly pathway that leads to supported and hierarchically organized goldnanoparticle mesostructure arrays on solid substrates such as glass slide, thermal oxide, photopolymerfilm, and mica. Using the nanoparticle micelle as a building block, hierarchical gold nanoparticlemesostructure arrays were prepared by a hydrothermal nucleation and growth process through self-assemblyof nanoparticle micelles and organosilicates under basic conditions. Depending on the substrates used,the shape, order, and orientation of the gold nanoparticle mesostructure during nucleation and growthexhibit distinct features. Transmission electron microscopy and X-ray diffraction results revealed thatgold nanoparticles were organized as a face-centered cubic mesostructure with precisely controlledinterparticle spacing. Optical characterization using UV-vis spectroscopy shows a characteristic surfaceplasmon resonance band resulted from the ordered nanoparticle arrays. This method provides new meansfor colloidal self-assembly and for the fabrication of platforms for surface enhanced Raman scattering-based sensors and electric and optical nanodevices with enhanced thermal, chemical, and mechanicalrobustness.