| Full text | |
| Author(s): |
de Almeida, Eduardo
[1]
;
Melquiades, Fabio L.
[2]
;
Marques, Joao P. R.
[1]
;
Margui, Eva
[3]
;
de Carvalho, Hudson W. P.
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Ctr Nucl Energy Agr, Av Centenario 303, BR-13416000 Piracicaba, SP - Brazil
[2] Univ Estadual Londrina, Phys Dept, Rodovia Celso Garcia Cid, PR 445, Km 380, BR-86057970 Londrina, PR - Brazil
[3] Univ Girona, Dept Chem, C Maria Aurelia Capmany 69, Girona 17003 - Spain
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY; v. 167, MAY 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
The objective of this work was to investigate the potential of energy dispersive X-ray fluorescence spectrometry for polymeric thin film thickness measurements using univariate and multivariate statistical tools. To this end, nine polymeric films 1.5 to 7.6 mu m thick with different composition were used for calibration and validation purposes. The univariate approach was not suitable as thickness measurement strategy, because the coefficient of determination (R-2) between the Rh-Ka Compton (18.54-19.83 keV) counting rate and the thin film thickness was estimated as 0.873 (n = 9). Even lower R-2 values were estimated for other X-ray spectral regions. On the other hand, the multivariate approach proved to be appropriated for the polymeric thin film thickness measurement, presenting satisfactory R-2 values (0.993-0.998; n = 8), precision (4%) and recovery (97%). The scanning electron microscopy was employed for validation of the proposed multivariate strategy. One can concluded that we show that the energy dispersive X-ray fluorescence using multivariate approach is a powerful non-destructive tool to measure the polymeric thin film thickness. (AU) | |
| FAPESP's process: | 15/05942-0 - Shedding light on the metabolism of nanomaterials absorbed by plants with X-ray and vibrational spectroscopy |
| Grantee: | Hudson Wallace Pereira de Carvalho |
| Support Opportunities: | Research Grants - Young Investigators Grants |