Decomposition of solvates of aluminum hydride and its derivatives in ethereal solutions under the influence of titanium compounds

Aluminum Nanocrystals

“…Aluminum is the most abundant metal in the earth’s crust and can support a UV plasmon resonance. − , Recent research on lithographically fabricated aluminum nanostructures demonstrated that the plasmon resonance is highly sensitive to oxygen content, redshifting and attenuating the plasmon resonance with increasing oxygen content. , Chemical methods for the synthesis of Al nanoparticles have involved the thermal decomposition of an aluminum hydride with a titanium catalyst but size and shape control have proven to be problematic with this approach. − In this Letter, we report the facile synthesis of highly regular, faceted aluminum nanocrystals with controllable nanocrystal diameters ranging from 70 to greater than 200 nm. The optical properties of individual Al nanocrystals were measured using dark-field spectroscopy, cathodoluminescence (CL), and electron-energy loss spectroscopy (EELS), which clearly show the size-dependent, continuous tuning of the optical resonance from ultraviolet to the visible region of the spectrum with increasing nanocrystal diameter.…”

“…4 Chemical methods for the synthesis of Aluminum nanoparticles have involved the thermal decomposition of an aluminum hydride with a titanium catalyst, but size and shape control have proven to be problematic with this approach. [11][12][13][14][15][16][17][18][19] In this letter we report the facile synthesis of highly regular, faceted aluminum nanocrystals with controllable nanocrystal diameters ranging from 70 to greater than 200 nm.…”

“…A 0.5 mL sample of a 3.3 mM solution of titanium­(IV) isopropoxide in toluene was added rapidly via syringe. The role of titanium is not explicitly clear, however, a variety of plausible mechanisms in similar types of reactions have been proposed. , After 2.5 min, 0.5 mL of a 250 mM solution of oleic acid in 1,4-dioxane was added rapidly via syringe and the solution turned from clear to brown. The reaction proceeded for 2 h during which the reaction turned from black to gray: the smaller the resulting particles, the darker the solution.…”