Parallel factor analysis of EEM of the fluorescence of carbon dots nanoparticles

The effect of experimental factors [pH and Hg(II)] on the fluorescence excitation emission matrices (EEMs) of nanosensor carbon dots (CDs) was analyzed by multiway decomposition methods based on parallel factor (PARAFAC) analysis. PARAFAC analysis of the EEM structures identifies three components co...

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Bibliographic Details
Main Author: Joao M M Leitao (author)
Other Authors: Helena Goncalves (author), Joaquim C G E Esteves da Silva (author)
Format: article
Language:eng
Published: 2010
Subjects:
Espectroquímica, Quimíca inorgânica, Engenharia electrotécnica, electrónica e informática
Spectrochemistry, Inorganic chemistry, Electrical engineering, Electronic engineering, Information engineering
Online Access:https://hdl.handle.net/10216/97016
Country:Portugal
Oai:oai:repositorio-aberto.up.pt:10216/97016
Description
Summary:The effect of experimental factors [pH and Hg(II)] on the fluorescence excitation emission matrices (EEMs) of nanosensor carbon dots (CDs) was analyzed by multiway decomposition methods based on parallel factor (PARAFAC) analysis. PARAFAC analysis of the EEM structures identifies three components corresponding to two different-sized CDs with the Hg(II) and pH profiles highly correlated plus a background. Parallel profiles with Linear Dependences (PARALIND) model with three components in the excitation-emission spectral modes and two components in the Hg(II) or pH mode gave similar results as PARAFAC, but is more useful from a theoretical point of view because PARALIND shows that the two different-sized CDs have similar chemical reactivity toward Hg(II) and pH. PARAFAC2 was used as a trilinear confirmatory test of the data structures under analysis. Copyright (C) 2010 John Wiley & Sons, Ltd.

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