Light-induced selective deposition of Au nanoparticles on single-wall carbon nanotubes
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Novel applications of single-walled carbon nanotubes (SWNT) rely on the development of new strategies to make them easier to handle without affecting their structural properties. In this work, we have selectively deposited Au nanoparticles (Au NP) on SWNT assisted by UV light irradiation. XPS analysis and UV-vis spectroscopy indicate that the deposition occurs at the defects generated after oxidation of the SWNT. By addition of n-dodecylthiol, the separation of oxidized tubes with Au NP (Au-ox-SWNT) from tubes devoid of Au NP (bare tubes, b-SWNT) was achieved. Raman and UV-vis-NIR spectra indicate that UV irradiation induces a faster nucleation of Au NP on metallic SWNT. This new technique can be useful for the preparation of nanohybrid composites with enhanced properties, as increased thermal stability, and to obtain purified SWNT. © 2010 American Chemical Society.
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gold nanoparticles; nanocomposites; single-walled carbon nanotubes; UV light irradiation Au nanoparticle; Gold Nanoparticles; Nanohybrids; New strategy; Novel applications; Selective deposition; Single-wall carbon nanotubes; Single-walled carbon; Thermal stability; UV irradiation; UV-light irradiation; UV-vis spectroscopy; UV-VIS-NIR spectra; XPS analysis; Gold; Gold alloys; Gold deposits; Irradiation; Nanocomposites; Nanoparticles; Single-walled carbon nanotubes (SWCN); Ultraviolet spectroscopy; Gold coatings; carbon nanotube; gold; metal nanoparticle; oxygen; article; atomic force microscopy; chemistry; light; methodology; nanotechnology; near infrared spectroscopy; Raman spectrometry; surface property; transmission electron microscopy; ultraviolet radiation; Gold; Light; Metal Nanoparticles; Microscopy, Atomic Force; Microscopy, Electron, Transmission; Nanotechnology; Nanotubes, Carbon; Oxygen; Spectroscopy, Near-Infrared; Spectrum Analysis, Raman; Surface Properties; Ultraviolet Rays
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