AI Article Synopsis
- Researchers incorporated a rosamine fluorescent dye into transparent TiO2 and SiO2 thin films using a technique called glancing angle physical vapor deposition (GAPVD).
- They analyzed the dye's adsorption behavior and kinetics through UV-Vis absorption and fluorescence measurements, finding that the process followed a Langmuir isotherm and pseudosecond order kinetics.
- The study revealed the dye's anchoring mechanism and demonstrated that the optimized films showed enhanced sensitivity toward NO2 gas, outperforming other similar films described in previous studies.
Article Abstract
The incorporation of a prototypical rosamine fluorescent dye from organic solutions into transparent and microstructured columnar TiO2 and SiO2 (MO2) thin films, prepared by evaporation at glancing angles (GAPVD), was evaluated. The aggregation of the adsorbed molecules, the infiltration efficiency and the adsorption kinetics were studied by means of UV-Vis absorption and fluorescence spectroscopies. Specifically, the infiltration equilibrium as well as the kinetic of adsorption of the emitting dye has been described by a Langmuir type adsorption isotherm and a pseudosecond order kinetic model, respectively. The anchoring mechanism of the rosamine to the MO2 matrix has been revealed by specular reflectance Fourier transform infrared spectroscopy and infiltration from aqueous solutions at different pH values. Finally, the sensing performance towards NO2 gas of optimized films has been assessed by following the changes of its fluorescence intensity revealing that the so-selected device exhibited improved sensing response compared to similar hybrid films reported in the literature.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459166 | PMC |
| http://dx.doi.org/10.3390/ma10020124 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!