1. Solvothermal vapor annealing setup for thin film treatment: A compact design with in situ solvent vapor concentration probe.
- Author
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Ariaee, Sina, Jakobsen, Bo, Pedersen, Ib Høst, Rasmussen, Torben Steen, and Posselt, Dorthe
- Subjects
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THIN films , *GAS mixtures , *POLYMER films , *VAPORS , *WASTE gases , *SOLVENTS , *ACETONE , *TOLUENE - Abstract
A compact setup for in situ solvothermal vapor annealing of thin polymer films in the temperature range from room temperature to 70 °C is presented. The design is optimized to avoid solvent condensation in tubes and other components. The setup consists of a chamber, a gas delivery system, a commercial film-thickness measuring device, and a solvent vapor concentration sensor. The chamber is equipped with heaters and thermometers and is thermally insulated. It has windows to allow for penetration of xrays together with a sample table with a gas distributer to ensure homogeneous swelling of the polymer film. The computer-controlled gas delivery system has two different components, which can be used separately or in parallel (for mixed gas solvent annealing): (a) mass flow controllers and a bubbler system and (b) a commercial "controlled evaporation and mixing" system. The film-swelling ratio is determined in situ using optical reflectometry, and the solvent concentration in the exhaust gas is continuously monitored by UV-absorption. Test results are presented where the setup is used for swelling of ∼100 nm thick polystyrene and polyisoprene homopolymer films with toluene and acetone, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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