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Generalized Fabrication of Surfactant-Stabilized Anisotropic Metal Nanoparticles to Amino-Functionalized Surfaces: Application to Surface-Enhanced Raman Spectroscopy

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A universal and facile approach for the self-assembly of surfactant-coated anisotropic metal nanoparticles on the amino-functionalized planar and spherical surfaces based on electrostatic attraction has been explored. Large-scale and different surface coverage of monolayer film and metallodielectric core–shell nanostructures of anisotropic metal nanoparticles, including Au nanorods, AucoreAgshell nanorods and Ag nanoprisms, have been fabricated. The optical response in the visible and the near infrared (NIR) of resulting nanostructures can be easily controlled by varying the concentration of the anisotropic nanoparticle, the amount of silica particles, and the immersion time of the substrates. Large-scale anisotropic metal nanoparticle monolayer films with subtle control over the surface coverage and tunable plasmon resonance as surface-enhanced Raman spectroscopy (SERS) substrates for probing 4-aminothiophenol were investigated, which exhibited high SERS activity, stability and reproducibility.
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Keywords: AG NANOPRISMS; ANISOTROPIC METAL NANOPARTICLES; AU NANORODS; AUCORE AGSHELL NANORODS; SERS

Document Type: Research Article

Publication date: 2008-11-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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