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Accession Number ADA580298
Title Photothermally Activated Motion and Ignition Using Aluminum Nanoparticles.
Publication Date Jan 2013
Media Count 9p
Personal Author J. E. Abboud M. Zhang N. Jiang X. Chong Z. Zhang
Abstract The aluminum nanoparticles (Al NPs) are demonstrated to serve as active photothermal media, to enhance and control local photothermal energy deposition via the photothermal effect activated by localized surface plasmon resonance (LSPR) and amplified by Al NPs oxidation. The activation source is a 2-AA-battery-powered xenon flash lamp. The extent of the photothermally activated movement of Al NPs can be approx. 6 mm. Ignition delay can be approx. 0.1 ms. Both scanning electron microscopy and energy-dispersive X-ray spectroscopy measurements of motion-only and after-ignition products confirm significant Al oxidation occurs through sintering and bursting after the flash exposure. Simulations suggest local heat generation is enhanced by LSPR. The positive- feedback effects from the local heat generation amplified by Al oxidation produce a large increase in local temperature and pressure, which enhances movement and accelerates ignition.
Keywords Activation
Al np(Aluminum nanoparticles)
Aluminum
Heat
Ignition
Lspr(Localized surface plasmon resonance)
Nanoparticles
Oxidation
Photothermal activation
Photothermal energy
Plasmons
Pressure
Reprints
Resonance
Scanning electron microscopy
Temperature
X ray spectroscopy
Xenon lamps


 
Source Agency Non Paid ADAS
NTIS Subject Category 99F - Physical & Theoretical Chemistry
97O - Miscellaneous Energy Conversion & Storage
71N - Nonferrous Metals & Alloys
Corporate Author Air Force Research Lab., Wright-Patterson AFB, OH. Propulsion Directorate.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1325
Contract Number W911NF-10-1-0114 FA8650-10-C-2008

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