Identification of organic particles via Raman techniques after capture in hypervelocity impacts on aerogel

Burchell, Mark J. and Creighton, Alan and Kearsley, Anton T. (2004) Identification of organic particles via Raman techniques after capture in hypervelocity impacts on aerogel. Journal of Raman Spectroscopy, 35 (3). pp. 249-253. ISSN 0377-0486. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Capture of small (micrometre-scale) particles in space occurs at high speeds (typically greater than a few km s(-1)) and impacts at such speeds usually vaporize the projectile. However, impact on a porous, low-density medium such as aerogel is not so disruptive and thus the incident particle may be captured relatively intact, even at speeds of 5-6 km s-1. Analysis and subsequent handling of captured particles require great care, and an in situ technique is required for rapid characterization of the particles. Previously it has been shown that Raman techniques can be used for identifying silicate and oxide mineral grains captured in this fashion. Here it is shown that this is also true for organic materials. Particles of poly(methyl methacrylate) and poly(ethyl methacrylate) were fired into aerogel (density 60 km m(-3)) at speeds of similar to5 km s(-1). The Raman spectra obtained from raw grains are comparable to those obtained in situ from grains captured in aerogel. This shows chemically that these organic particles survive the impact process, and that this technique can be used to identify at least some types of organic materials captured in aerogel at high speeds.

Item Type: Article
Uncontrolled keywords: aerogel; hypervelocity; organic materials; particles in space
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Mark Burchell
Date Deposited: 08 Sep 2008 15:19
Last Modified: 12 Jun 2014 11:30
Resource URI: (The current URI for this page, for reference purposes)
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