Results 61 to 70 of about 6,429 (270)

Use of the MA-XRF Technique in the Authentication of Guignard’s Artwork Recovered by the RJ Civil Police

Semina: Ciências Exatas e Tecnológicas
Artworks are frequently implicated in the commission of crimes of money laundering, fraud, corruption and robbery/theft. On August 10, 2022, Operação Sol Poente (Operation Setting Sun), launched by the Civil Police of Rio de Janeiro, recovered seventeen ...
Nilton Thaumaturgo Rocha Junior, Claudia Regina Ferreira de Souza, André Rocha Pimenta, Valter de Souza Félix, Renato Pereira de Freitas   +4 more
doaj   +1 more source

Visualising iron gall ink underdrawings in sixteenth century paintings in-situ by micro-XRF scanning (MA-XRF) and LED-excited IRR (LEDE-IRR)

Heritage Science, 2022
Until today, iron gall ink is classified as an exceptional underdrawing material for paintings. Its study and definite identification is usually based on invasive analysis.
Mareike Gerken, Jochen Sander, Christoph Krekel   +2 more
doaj   +1 more source

Illuminated manuscript analysis methodology using MA-XRF and NMF: Application on the Liber Feudorum Maior

Microchemical Journal, 2021
The determination of the composition of illuminated manuscripts' components is an important tool for the better understanding of their history, their origin and the procedures carried out for their elaboration, providing an insight into techniques and materials used in the times of their fabrication.
Magkanas, Georgios, Bagán Navarro, Héctor, Sistach, M.C., García Martínez, José Francisco   +3 more
openaire   +2 more sources

Unprecedented Spin‐Lifetime of Itinerant Electrons in Natural Graphite Crystals

Advanced Functional Materials, EarlyView.
Graphite exhibits extraordinary spintronic potential, with electron spin lifetimes reaching 1,000 ns at room temperature ‐ over 100 times longer than graphene‐based devices. Magnetic resonance spectroscopy reveals strong anisotropy: out‐of‐plane spins live 50 times longer than their in‐plane counterparts.
Bence G. Márkus, Dávid Beke, Lili Vajtai, András Jánossy, László Forró, Ferenc Simon   +5 more
wiley   +1 more source

Discovery of a woman portrait behind La Violoniste by Kees van Dongen through hyperspectral imaging

Heritage Science, 2017
Despite the fact that Kees van Dongen was one of the most famous painters of the twentieth century, only little information about his palette and his technique is available.
Elodie Herens, Catherine Defeyt, Philippe Walter, David Strivay   +3 more
doaj   +1 more source

Synergistic Compatibilization of CsPbBr3 Perovskites and HfO2 Nanocrystals for Hybrid Sensitized Nanoscintillators

Advanced Functional Materials, EarlyView.
Lead halide perovskite nanocrystals are promising scintillators but suffer from reabsorption losses and limited compatibility with high‐Z additives. Hybridization of CsPbBr3 nanocrystals with PbBr2‐passivated HfO2 nanoparticle sensitizers, achieved during or after synthesis, produces stable composites with maintained optical quality, improved ...
Francesco Bruni, Saptarshi Chakraborty, Andrea Fratelli, Abdessamad El Adel, Jordi Llusar, Francesco Carulli, Matteo L. Zaffalon, Chenger Wang, Vojtech Zabloudil, Etiennette Auffray, Francesco Meinardi, Leonardo Poletti, Laura Lazzarini, Daniela Manno, Anna Galli, Francesca Rossi, Ivan Infante, Sergio Brovelli   +17 more
wiley   +1 more source

Development of a Macro X-ray Fluorescence (MA-XRF) Scanner System for In Situ Analysis of Paintings That Operates in a Static or Dynamic Method

Quantum Beam Science
This work presents the development of a macro X-ray fluorescence (MA-XRF) scanner system for in situ analysis of paintings. The instrument was developed to operate using continuous acquisitions, where the module with the X-ray tube and detector moves at ...
Renato P. de Freitas, Miguel A. de Oliveira, Matheus B. de Oliveira, André R. Pimenta, Valter de S. Felix, Marcelo O. Pereira, Elicardo A. S. Gonçalves, João V. L. Grechi, Fabricio L. e. Silva, Cristiano de S. Carvalho, Jonas G. R. S. Ataliba, Leandro O. Pereira, Lucas C. Muniz, Robson B. dos Santos, Vitor da S. Vital   +14 more
doaj   +1 more source

Toward Scalable Solutions for Silver‐Based Gas Diffusion Electrode Fabrication for the Electrochemical Conversion of CO2 – A Perspective

Advanced Functional Materials, EarlyView.
In this study, the preparation techniques for silver‐based gas diffusion electrodes used for the electrochemical reduction of carbon dioxide (eCO2R) are systematically reviewed and compared with respect to their scalability. In addition, physics‐based and data‐driven modeling approaches are discussed, and a perspective is given on how modeling can aid ...
Simon Emken, K. Ashoke Raman, Alexander Bauer, Violeta Karyofylli, Eva Jodat, André Karl, Rüdiger‐A. Eichel   +6 more
wiley   +1 more source

Structural Porosity and Low Mineral Density in Enamel Rods Drive Molar Incisor Hypomineralisation

Advanced Functional Materials, EarlyView.
This study uses advanced imaging modalities on multiple length scales to show that molar‐incisor hypomineralization does not present as a locally homogeneous pathology. Instead, microstructural defects, characterized through non‐mineralized, protein‐rich sheaths and an altered mineral structure in between prism rods, resulting in local differences in ...
Katharina Jähn‐Rickert, Johannes Krug, Gudrun Lotze, Imke A.K. Fiedler, Diana Freund, Ezgi Deniz Türkoğlu, Christine Plumeyer, Felix N. von Brackel, Anton Davydok, Manfred Burghammer, Thomas Beikler, Thomas F. Keller, Katrin Bekes, Elizabeth A. Zimmermann, Björn Busse   +14 more
wiley   +1 more source

Improving data exploration methods from macro imaging techniques: in situ scanning macro-xrf investigation on a majolica tile tableau [PDF]

, 2018
A state-of-the-art method for non-invasive visualization of subsurface layers present in works of art is for the fi rst time employed to study an Antwerp majolica tile tableau manufactured in the mid of the 16th century.
Colombo, Marco, Janssens, Koen, Legrand, Stijn, Snickt, Geert Van der   +3 more
core   +2 more sources