Open AccessTemperature Influence on Organic Molecular Interaction on Silicon Oxide Surface In Situ Measured Utilizing a Quartz Crystal Microbalance
Author(s) -
Kenta Hori,
Yifan Zhou,
Tomohiko Kanai,
Hitoshi Habuka
Publication year - 2020
Publication title -
ecs journal of solid state science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 51
eISSN - 2162-8777
pISSN - 2162-8769
DOI - 10.1149/2162-8777/abc1f4
Subject(s) - quartz crystal microbalance , physisorption , materials science , silicon , desorption , oxide , analytical chemistry (journal) , atmospheric temperature range , crystal (programming language) , adsorption , chemical engineering , chemical physics , chemistry , thermodynamics , chromatography , computer science , engineering , metallurgy , programming language , physics
The influence of temperature on the molecular interaction between diethylphthalate (DEP) and L-Menthone (Mth) on a silicon native oxide surface was in situ real time evaluated utilizing a quartz crystal microbalance. By increasing the temperature from 25 °C to 35 °C in a single component system, the physisorption and desorption rate constants of DEP increased, while those of Mth showed significantly small changes. Simultaneously, the surface concentrations of DEP and Mth decreased with the increasing temperatures. In the two-component system, the surface concentration was measured by alternatively changing gas phase concentrations of DEP and Mth in order to evaluate whether it irreversibly or reversibly changed. Because the surface concentration change was irreversible at 25 °C, the molecular interaction between the DEP and Mth was considered to exist. In contrast, the change became reversible with the increasing temperature to produce a negligible molecular interaction between them. Such a behavior change occurred in the temperature range less than 10 °C. The low surface concentration by the increasing temperature was considered to weaken the attractive molecular interaction.