| Full text | |
| Author(s): |
Garcia, Melina P. B.
;
Martin, Cibely S.
;
Kavazoi, Henry S.
;
Maximino, Mateus D.
;
Alessio, Priscila
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Thin Solid Films; v. 777, p. 10-pg., 2023-07-31. |
| Abstract | |
The deposition technique, structure, and thermal treatment can influence the optical and electrical properties of perylene derivatives films. In this work, the nanostructured Langmuir-Schaefer films of bis(n-propylimide) perylene (PTCD-Pr) with thermal treatment were optimized for an electrochemical application. The PTCD-Pr film before and after thermal treatment was characterized by ultraviolet-visible absorption, infrared absorption spectroscopy, micro-Raman scattering, and voltammetry. Brewster angle microscopy images confirmed the higher aggregation degree of molecules on Langmuir film. The PTCD-Pr deposition showed a linear growth, forming H, J, and null aggregates. The infrared absorption spectroscopy indicates a preferential head-on orientation with a slight chromophore deviation. After thermal treatment (200 degrees C for 2 h), the PTCD-Pr film showed a decrease in the contribution of null aggregates while maintaining the same molecular orientation. The Raman and surface-enhanced Raman spectroscopy measurements also confirmed the presence of PTCD-Pr molecules distributed throughout the substrate surface, and the thermal treatment conditions did not degrade the PTCD-Pr molecule. Moreover, thermal treatment contributes to the increase of stability of the film at the electrode surface for electrochemical measurements. In the presence of active species (paraquat in this case), the thermally treated film showed promising electrocatalytic properties compared to the unmodified electrode. (AU) | |
| FAPESP's process: | 21/14235-6 - Membrane mimetic models applied in interaction studies, detection, and removal of emerging pollutants |
| Grantee: | Priscila Alessio Constantino |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/15019-0 - Combination of confocal fluorescence microscopy and surface-enhanced Raman scattering techniques: interaction, detection, and quantification of molecules of interest in biomimetic system. |
| Grantee: | Cibely da Silva Martin Sonvesso |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis |
| Grantee: | Osvaldo Novais de Oliveira Junior |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 14/50869-6 - INCT 2014: on Organic Electronics |
| Grantee: | Roberto Mendonça Faria |
| Support Opportunities: | Research Projects - Thematic Grants |