000			01954nab a2200205 4500
005			20260520000840.0
008			260224s2009 xxu
245	0	0	_aOxide-free, catalyst-coated, fuel-soluble, air-stable boron nanopowder as combined combustion catalyst and high energy density fuel
260			_a _b _cnov./dic. 2009
270			_a09/06/2010 ; 09/06/2010
300			_a10 p. ; 6111-6120
520			_aTranscripción del resumen del autor. Elemental boron has one of the highest volumetric heats of combustion known and is therefore of interest as a high energy density fuel. The fact that boron combustion is inherently a heterogeneous process makes rapid efficient combustion difficult. An obvious strategy is to increase the surface area/volume ratio by decreasing the particle size. This approach is limited by the fact that boron forms a 0.5 nm thick native oxide layer, which not only inhibits combustion, but also consumes an increasing fraction of the particle mass as the size is decreased. Another strategy might be to coat the boron particles with a material (e.g., catalyst) to enhance combustion of either the boron itself or of a hydrocarbon carrier fuel. We present a simple, scalable, one-step process for generating air-stable boron nanoparticles that are unoxidized, soluble in hydrocarbons, and coated with a combustion catalyst. Ball milling is used to produce 50 nm particles, protected against room temperature oxidation by oleic acid functionalization, and optionally coated with catalyst. Scanning and transmission electron microscopy and dynamic light scattering were used to investigate size distributions, with X-ray photoelectron spectroscopy to probe the boron surface chemistry.
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aVan Devener, Brian _942432
100	1		_aPerez, Jesus Paulo L. _942433
100	1		_aJankovich, Joseph _942434
999			_c170860 _d170860