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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of the polymeric thin film thickness by energy dispersive X-ray fluorescence and multivariate analysis

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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