Many results of thin film studies prove that impurities are accumulated at the surface of crystals or at the grain boundaries, and are responsible for the structural, physical and chemical properties of films. The accumulated form of impurities enables to understand why impurities can be extremely active in determining the structural development also at very low concentration. The paper reviews some of these results and point to the situation that the various structural peculiarities of crystalline and amorphous films can be understood better when films are considered as multicomponent systems. Models proposed to describe the participation of impurities in the growth processes of crystals, amorphous grains and in their coalescence are discussed. It is shown that these processes can accumulate the impurity molecules.
|Title of host publication||Unknown Host Publication Title|
|Editors||Jose L. de Segovia|
|Publisher||Asociacion Espanola de Vacio y sus Aplicaciones|
|Number of pages||15|
|Publication status||Published - dec. 1 1983|
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