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About

About

I was born in Lisbon, Portugal, in 1983 and graduated from Faculdade de Ciências e Tecnologia Universidade Nova de Lisboa (FCT-UNL) in Physics Engineering in 2006. My undergraduate research consisted in developing and assembly of a specialized X-ray fluorescence spectrometer. This work lead to a Master in Physics Engineering (FCT-UNL, 2007) and a PhD in Atomic Physics (FCT-UNL, 2011) entitled: “Measurement of lead concentration in biological tissues by atomic spectroscopy techniques”.

In 2012, I moved to Albany (New York, USA) as a Postdoc in Analytical Chemistry, to work at the Trace Elements group, Wadsworth Center New York State Department of Health. In the same year I transitioned to a Research Scientist position and became supervisor of the X-ray lab. Here I participated in multiple projects concerning biomonitoring and environmental analysis of trace elements in several matrices (food, cosmetics, medicines, consumer products, human tissues and body fluids) using analytical techniques based on atomic spectrometry, including synchrotron radiation at the Cornell University. I also spent 2 years as a Research Assistant Professor at the University at Albany, State University of New York – School of Public Health, Department of Environmental Health Sciences.

In 2016 I decided to shift my research focus from atomic to nuclear radiation.  I moved to Porto, Portugal, and I am currently working at INESC-TEC developing fiber optic sensors to detect the presence of Radon, a radioactive element, in marine environments.

Interest
Topics
Details

Details

  • Nationality

    Portugal
  • Centre

    Applied Photonics
  • Contacts

    +351220402301
    diana.f.guimaraes@inesctec.pt
002
Publications

2023

Intelligent grids for faster elemental mapping with Laser-induced breakdown spectroscopy

Authors
Capela, D; Ferreira, M; Lima, A; Jorge, P; Guimarães, D; Silva, NA;

Publication
Results in Optics

Abstract

2023

Interactive three-dimensional chemical element maps with laser-induced breakdown spectroscopy and photogrammetry

Authors
Lopes, T; Rodrigues, P; Cavaco, R; Capela, D; Ferreira, FS; Guimarães, D; Jorge, AS; Silva, A;

Publication
Spectrochimica Acta - Part B Atomic Spectroscopy

Abstract

2022

Effects of Pulse Duration in Laser-induced Breakdown Spectroscopy

Authors
Ferreira, MFS; Silva, NA; Guimarães, D; Martins, RC; Jorge, PAS;

Publication
U.Porto Journal of Engineering

Abstract
Laser-induced breakdown spectroscopy (LIBS) is a technique that leverages atomic emission towards element identification and quantification. While the potential of the technology is vast, it still struggles with obstacles such as the variability of the technique. In recent years, several methods have exploited modifications to the standard implementation to work around this problem, mostly focused on the laser side to increase the signal-to-noise ratio of the emission. In this paper, we explore the effect of pulse duration on the detected signal intensity using a tunable LIBS system that consists of a versatile fiber laser, capable of emitting square-shaped pulses with a duration ranging from 10 to 100 ns. Our results show that, by tuning the duration of the pulse, it is possible to increase the signal-to-noise ratio of relevant elemental emission lines, an effect that we relate with the computed plasma temperature and associated density for the ion species. Despite the limitations of the work due to the low-resolution and small range of the spectrometer used, the preliminary results pave an interesting path towards the design of controllable LIBS systems that can be tailored to increase the signal-to-noise ratio and thus be useful for the deployment of more sensitive instruments both for qualitative and quantitative purposes.

2022

Special issue on biological and biomedical applications of X-ray spectrometry

Authors
Pessanha, S; Silva, AL; Guimaraes, D;

Publication
X-RAY SPECTROMETRY

Abstract

2022

Towards robust calibration models for laser-induced breakdown spectroscopy using unsupervised clustered regression techniques

Authors
Silva N.A.; Capela D.; Ferreira M.; Gonçalves F.; Lima A.; Guimarães D.; Jorge P.A.S.;

Publication
Results in Optics

Abstract