Abstract
Mesoporous silica thin films have been prepared using a self-assembling process employing cetyltrimethylammonium bromide (CTAB) as the organic template. The films were deposited by dip-coating on silicon and alumina substrates. Thermal treatment at 250 and 450°C was used to remove the organic template. Fourier transformed infra-red spectra demonstrated that calcination is complete at 450°C. Electrical measurements under dry and wet conditions were performed for films deposited on alumina substrates with comb-type gold electrodes. The films showed an increase in current intensity as a function of relative humidity. No memory effects were observed after cyclic testing in dry-wet conditions. Electrical characterisation indicates that the mesophase is easily accessible by the external environment.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 299-303 |
| Number of pages | 5 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 76 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Jun 1 2001 |
| Externally published | Yes |
| Event | Proceeding of the 8th International Meeting on Chemical Sensors - Basel, Switzerland Duration: Jul 2 2000 → Jul 5 2000 |
Keywords
- Electrical characterisation
- Humidity sensors
- Mesoporous silica
- Self-assembly process
- Thin films
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Metals and Alloys
- Instrumentation
- Materials Chemistry
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering