Science Seminars

9/2/2011 – Space Science Applications for Polypyrrole-based Particles

Speaker: Steve Armes, University of Sheffield, UK
Date: Friday, Sep 02, 2011
Time: 4:00 PM
Location: LSTB-299

Seminar Abstract:

Polypyrrole is an air-stable organic conducting polymer. It can be easily prepared in the form of microscopic particles or alternatively deposited as an ultrathin overlayer on either polymer latex particles or mineral grains. Its conductivity is sufficiently high to enable the efficient accumulation of surface charge and hence acceleration of such colloidal particles up to hypervelocities (1 to 38 km s-1). Thus polypyrrole-based particles are useful for space scientists interested in mimicking the behaviour of micro-meteorites (a.k.a. cosmic dust). Synthetic mimics for carbonaceous, silica-rich or sulfur-rich micro-meteorites have now been designed and specific examples will be discussed in this seminar.