Papers by Damiano Martorelli
Nuclear Inst. and Methods In Physics Research B, 2019
The material study of ancient coins is very often rendered particularly challenging by several fa... more The material study of ancient coins is very often rendered particularly challenging by several factors: the presence of surface alteration products; the occasional or deliberate, e.g., forgery, changes in the composition of the base alloy; the misleading information deriving from historical and literature sources. We present herewith a multi-analytical approach to the study of ancient coins. The selected test samples are coins widely used in the Venetian Republic over a time span ranging from the second half of the 16th until the early years of the 17th century: the so-called "sesino". The rationale of the study was to establish a model, taking into account the layered structure of the surface region of the coins, that once validated could be used for a fully non-destructive characterization of similar items. The specific interest of the results obtained from this investigation is twofold. First, the actual composition of the copper based alloy used for these specific type of Venetian coin, has been measured for the first time with direct measurements on the coin cross-section. Second, the detailed characterization of the coins provides an essential background knowledge for a fully non-destructive characterization of the same kind of coins.
Total Reflection X-Ray Fluorescence Analysis is an established technique for the quantitative ele... more Total Reflection X-Ray Fluorescence Analysis is an established technique for the quantitative elemental analysis of small amounts of solutions or suspensions. The technique offers high sensitivity and is considered not to suffer significantly from matrix effects. Quantitative analysis is typically carried out by internal standardization. This enables quantification to be carried out by intensity ratios, eliminating the dependence on geometrical factors, primary beam intensity and incomplete illumination of the deposited sample. Irradiating the sample with monochromatic radiation should make the results independent from saturation effects due to the absorption of the primary beam [1]. The method, however, only works under the assumption that the internal standard is homogeneously distributed in the solid residue obtained after evaporation and that there is no matrix effect such as differential absorption of the emitted fluorescence in the sample. Incomplete validity of these assumption is probably the reason of the inaccuracy and high standard deviation reported in the results of round robin tests [2]. The relevance of such phenomena increases because of the scarce reproducibility of the position and shape of the solid residues leading also to inaccuracy of the results.
In order to overcome such a fundamental limitation, in this work we investigate the use of bio-inspired micro-structured silicon surfaces as wet confinement sample holders, designed with an external super-hydrophobic ring for optimal distribution of the residues to be analyzed inside it [3].
Structures with different geometries have been realized and tested. First results will be presented.
[1] D. Hellin, W. Fyen, J. Rip, T. Delande, P. W. Mertens, S. De Gendt, C. Vinckier, Saturation effects in TXRF on micro-droplet residue samples, J. Anal. At. Spectrom., 19(12), 2004, 1517-1523
[2] L. Borgese et al., First Total Reflection X-Ray Fluorescence round-robin test of water samples: Preliminary results, Spectrochimica Acta Part B: Atomic Spectroscopy, 101, 6-14
[3] G. Ciasca, L. Businaro, A. De Ninno, A. Cedola, A. Notargiacomo, G. Campi, M. Papi, A. Ranieri, S. Carta, E. Giovine, A. Gerardino, Wet sample confinement by superhydrophobic patterned surfaces for combined X-ray fluorescence and X-ray phase contrast imaging, Microelectronic Engineering, 111, 2013, 304-309
The GIMPy program (acronym for Grazing incidence Material analysis with Python) [1] is a recently... more The GIMPy program (acronym for Grazing incidence Material analysis with Python) [1] is a recently released software devoted to analysis of energy dispersive X-ray fluorescence (EDXRF), Grazing incidence X-Ray Fluorescence (GIXRF), X-Ray Reflectivity (XRR) At the current state of development, GIMPy is based on Python scripting procedures. If this allows expert users to fully exploit Python flexibility in customizing investigations, on the other hand it limits the usability and friendliness of the program for non-specialist users. This is a strict requirement when moving from research (e.g. on material science/spectroscopy) to application as in the manufacturing and/or cultural heritage fields. Hence, the development of a new graphical user interface (GUI) was started, based on the open source Python porting of the Qt Libraries[2] and the powerful Matplotlib plotting library [3].
The GUI is available and it has been tested for both the Windows and Linux platforms. Details about the current structure of the GUI and the multiple document interface logic (MDI) adopted will be given, allowing the visualization and fitting of single spectra, spectral series, or scans (e.g. angular scans as in GIXRF). It will be shown how GIMPyGUI interfaces GIMPy in the background; how the GUI hides most of the complex aspects of scripting, driving the input of the parameters related to the sample and experimental setup description needed for data processing; and how it simplifies the quick identification of atomic elements in a spectrum through a special devoted panel. Examples of software usage and sample investigations will be shown. The aim of the presentation is to highlight the features of GIMPyGUI, the user friendliness and the possibilities it offers for the modeling of complex structures, and non-conventional fitting strategies.
[1] F. Brigidi, G.Pepponi, GIMPy: an analysis software for X ray fluorescence and X ray reflectivity data, EXRS 2016, Gothemborg, Sweden
[2] https://www.qt.io/
[3] http://matplotlib.org/
Books by Damiano Martorelli
L’Alto Adige/Südtirol dalla caduta dell’Impero Romano all’avvento di Carlo Magno (V-VIII sec.). Un nuovo approccio scientifico
Formalmente nel 476 d.C. l'Impero Romano d'Occidente giunse al suo epilogo, con la deposizione de... more Formalmente nel 476 d.C. l'Impero Romano d'Occidente giunse al suo epilogo, con la deposizione dell’ultimo imperatore Romolo Augustolo da parte del generale Odoacre; ma l'evento non ebbe in realtà una tale risonanza all’epoca: per dirla col Momigliano, fu “la caduta senza rumore di un impero”.
L'attuale Alto Adige/Südtirol, nel periodo storico che va dalla caduta dell’Impero d'Occidente all’avvento di Carlo Magno (V-VIII secolo), si trovò ad essere sempre più terra di confine, al centro delle dinamiche di potere delle potenze Longobarda, Franca e Baiuvara emergenti.
L'Autore, basandosi sulle poche fonti storiche disponibili e sui ritrovamenti archeologici, riletti, riordinati e integrati con altre fonti scientifiche, ricostruisce il quadro dell'epoca e di cosa accadde in oltre tre secoli di confronti, non solo armati.
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Papers by Damiano Martorelli
In order to overcome such a fundamental limitation, in this work we investigate the use of bio-inspired micro-structured silicon surfaces as wet confinement sample holders, designed with an external super-hydrophobic ring for optimal distribution of the residues to be analyzed inside it [3].
Structures with different geometries have been realized and tested. First results will be presented.
[1] D. Hellin, W. Fyen, J. Rip, T. Delande, P. W. Mertens, S. De Gendt, C. Vinckier, Saturation effects in TXRF on micro-droplet residue samples, J. Anal. At. Spectrom., 19(12), 2004, 1517-1523
[2] L. Borgese et al., First Total Reflection X-Ray Fluorescence round-robin test of water samples: Preliminary results, Spectrochimica Acta Part B: Atomic Spectroscopy, 101, 6-14
[3] G. Ciasca, L. Businaro, A. De Ninno, A. Cedola, A. Notargiacomo, G. Campi, M. Papi, A. Ranieri, S. Carta, E. Giovine, A. Gerardino, Wet sample confinement by superhydrophobic patterned surfaces for combined X-ray fluorescence and X-ray phase contrast imaging, Microelectronic Engineering, 111, 2013, 304-309
The GUI is available and it has been tested for both the Windows and Linux platforms. Details about the current structure of the GUI and the multiple document interface logic (MDI) adopted will be given, allowing the visualization and fitting of single spectra, spectral series, or scans (e.g. angular scans as in GIXRF). It will be shown how GIMPyGUI interfaces GIMPy in the background; how the GUI hides most of the complex aspects of scripting, driving the input of the parameters related to the sample and experimental setup description needed for data processing; and how it simplifies the quick identification of atomic elements in a spectrum through a special devoted panel. Examples of software usage and sample investigations will be shown. The aim of the presentation is to highlight the features of GIMPyGUI, the user friendliness and the possibilities it offers for the modeling of complex structures, and non-conventional fitting strategies.
[1] F. Brigidi, G.Pepponi, GIMPy: an analysis software for X ray fluorescence and X ray reflectivity data, EXRS 2016, Gothemborg, Sweden
[2] https://www.qt.io/
[3] http://matplotlib.org/
Books by Damiano Martorelli
L'attuale Alto Adige/Südtirol, nel periodo storico che va dalla caduta dell’Impero d'Occidente all’avvento di Carlo Magno (V-VIII secolo), si trovò ad essere sempre più terra di confine, al centro delle dinamiche di potere delle potenze Longobarda, Franca e Baiuvara emergenti.
L'Autore, basandosi sulle poche fonti storiche disponibili e sui ritrovamenti archeologici, riletti, riordinati e integrati con altre fonti scientifiche, ricostruisce il quadro dell'epoca e di cosa accadde in oltre tre secoli di confronti, non solo armati.