Abstract
Many theoretical studies have been proposed to understand the mechanism
of pentaerythritol tetranitrate (PETN) coarsening. Up to date, no
experimental observations of diffusion have been made. We present
experimental evidence of diffusion of PETN at nanoscale, as observed by
UV-absorbance spectroscopy. As a result of thermal gradient,
non-isothermal heating of continuous PETN nanofilms results in an
initial increased absorbance at ambient temperatures indicating
thickness increase due to coarsening, followed by absorbance decease due
to film sublimation at relatively higher temperatures. Diffusion
kinetics of PETN is measured both isothermally and non-isothermally and
the results are in very good agreement. (C) 2013 AIP Publishing LLC
[http://dx.doi.org/10.1063/1.4802890]
| Original language | English |
|---|---|
| Journal | Applied Physics Letters |
| State | Published - Apr 2013 |