TITLE:
Molecular Adsorption and Desorption Behavior on Silicon Surface in a Complex Ambient Atmosphere Containing Vapors of Diethylphthalate, Acetic Acid and Water
AUTHORS:
Hitoshi Habuka, Nobutaka Ono, Ayumi Sakurai, Tatsuhito Naito
KEYWORDS:
Silicon Surface; Diethylphthalate; Acetic Acid; Physisorption; Desorption
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.4 No.7A,
July
12,
2013
ABSTRACT: Using a complex ambient atmosphere containing vapors of
an organic compound, acid and water, the molecular adsorption
and desorption behavior on a silicon surface was studied using the in-situ measurement of a quartz crystal
microbalance linked to the rate theory. Because the behavior of
diethylphthalate (DEP) could be reproduced assuming a single-component
system, acetic acid (ACA) and DEP are concluded to separately exist in the
water film and at the water film surface, respectively. This conclusion was
obtained from both the adsorption and desorption behaviors. The process
developed in this study is useful for determining the layer in which chemical
compounds are present.