Abstract
In this work, poly(3-butoxythiophene) (P3BOT) mixed with stearic acid (SA) in different ratios have been used to form LB films. The incorporation of the ether group increases the hydrophilicity of the molecules. The mixed films on water subphase undergo a phase transition at the evaluated pressure. The adsorption behavior of the mixed films with a P3BOT/SA ratio of 2:1 on quartz crystal microbalance (QCM) as sensing materials to two series of chemical analyte vapors was investigated. The interaction mechanisms involving dipole/dipole or hydrogen bonding interaction were proposed to explain the frequency response during the adsorption. The sensitivity of the film on QCM increases with film thickness and the concentration of the analyte vapor. Moreover, this work indicates that the control of sensitivity and selectivity of polymer film sensor to chemical vapor can be achieved through functionalization of the polymer.
| Original language | English |
|---|---|
| Pages (from-to) | 90-94 |
| Number of pages | 5 |
| Journal | Thin Solid Films |
| Volume | 417 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Sept 30 2002 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry
Keywords
- Chemical sensor
- LB films
- Poly(3-butoxythiophene)
- Quartz crystal microbalance
- Vapor Adsorption