Record number :
1000541
Title of article :
Monte Carlo simulations of controlled rate thermal analysis spectra The influence of surface energetic heterogeneity and lateral interactions between adsorbed molecules
Author/Authors :
Tomasz Panczyk، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
14
From page :
353
To page :
366
Abstract :
Monte Carlo simulations of controlled rate thermal analysis (CRTA) spectra are presented. Calculations are performed for a few kinds of energetically heterogeneous surface, characterized by symmetrical and unsymmetrical desorption energy distributions. It is shown that the shape of the CRTA spectra corresponds with the shape of integral form of desorption energy distribution on the surface. A simple way of estimation of the upper limit of desorption energy is proposed. The influence of lateral interactions on the shape of the CRTA spectra is also discussed. It is stated that strong attractive interactions cause the desorption temperature to be constant. As a result of repulsive interactions two steps on the desorption temperature curve are observed. For the case of repulsive interactions between the nearest-neighbors and next-nearest-neighbors the CRTA spectra do not reveal the existence of multiple steps, contrary to the classical thermodesorption spectra (TPD) where, in such a case, multiple peaks are observed.
Keywords :
Surface energetic heterogeneity , Interactions , thermal desorption , Controlled rate thermal analysis
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
2005
Link To Document :
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