Photothermally activated motion and ignition using aluminum nanoparticles
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 ∼6 mm. Ignition delay can be ∼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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 14, 2013
- Source ID
- 10.1063/1.4776660
Entities
People
- Jacques E. Abboud
- James. R. Gord
- Mingjun Zhang
- Naibo Jiang
- Sukesh Roy
- Xinyuan Chong
- Zhili Zhang
Organizations
- Air Force Research Laboratory
- Army Research Office
- National Science Foundation
- University of Tennessee