PARAFAC analysis of IBIL spectra from silver ion exchanged glasses

G Valotto; E Cattaruzza; M Mardegan; A Quaranta

doi:10.1016/j.saa.2016.08.024

PARAFAC analysis of IBIL spectra from silver ion exchanged glasses

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Jan 15:171:346-350. doi: 10.1016/j.saa.2016.08.024. Epub 2016 Aug 16.

Authors

G Valotto¹, E Cattaruzza², M Mardegan², A Quaranta³

Affiliations

¹ Dipartimento di Scienze Ambientali, Informatica e Statistica, Università Ca' Foscari Venezia, I-30123 Venezia, Italy. Electronic address: valotto@unive.it.
² Centro per le Nanoscienze e i Nanobiomateriali, Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, I-30123 Venezia, Italy.
³ Dipartimento di Ingegneria Industriale, Università di Trento, via Mesiano 77, Povo, 38123 Trento, Italy; INFN, - TIFPA, Trento Institute of Fundamental and Applied Physics, via Sommarive 14, Povo, I-38123 Trento, Italy.

PMID: 27566921
DOI: 10.1016/j.saa.2016.08.024

Abstract

In this work we present for the first time an application of PARAllel FACtor (PARAFAC) analysis to the investigation of Ion Beam Induced Luminescence (IBIL) spectra of Ag⁺↔Na⁺ ion exchanged silicate glasses, in order to check the possibility to obtain additional information on the formation of silver aggregates under ion irradiation by a proper statistical rearrangement of experimental spectra. We decomposed the data by PARAFAC taking into account both IBIL emission features and their evolution as a function of the time. Shape and trend under irradiation of the extracted components were correlated to silver concentration and aggregates in the investigated systems. Strength and weakness of this statistical approach applied to IBIL spectra recorded as a function of time were evidenced and discussed.

Keywords: Glass; IBIL; PARAFAC; Silver ion exchanged.