Article
Spectroscopy
Nagore Prieto-Taboada, Silvia Fdez-Ortiz de Vallejuelo, Anne Santos, Marco Veneranda, Kepa Castro, Maite Maguregui, Hector Morillas, Gorka Arana, Alberta Martellone, Bruno de Nigris, Massimo Osanna, Juan Manuel Madariaga
Summary: The study focused on the degradation and conservation of the mural paintings in Ariadne's house in the archaeological park of Pompeii. Spectroscopic analyses revealed an older layer of paintings beneath the visible ones, providing evidence of the evolution of the social-economic status of the ancient owners.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Yeran Bai, Zhongyue Guo, Fatima C. Pereira, Michael Wagner, Ji-Xin Cheng
Summary: A mid-infrared photothermal-fluorescence in situ hybridization (MIP-FISH) platform is developed for simultaneous identification and metabolic analysis of microbes with single-cell resolution and high throughput. By improving MIP imaging, isotopically labeled compounds incorporated into proteins of individual bacterial cells can be sensitively detected, while FISH labeling with rRNA-targeted probes enables the identification of the analyzed cells. In proof-of-concept experiments, MIP-FISH successfully discriminates and identifies labeled bacterial cells within a complex human gut microbiome sample based on the clear spectral red shift in the protein amide I region caused by incorporation of 13C atoms from 13C-labeled glucose. This study opens up new opportunities for single-cell structure-function analyses in microbiology.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Fu Zhang, Jinglin You, Xiaohui Tang, Jian Wang, Xiaoye Gong, Aurelien Canizares, Liming Lu, Kai Tang
Summary: The distribution of different types of clusters in a binary NaF-AlF3 molten salt system was investigated using in situ high-temperature Raman spectroscopy and quantum chemistry calculations. The dominant species in the system were AlF63-, AlF52-, and AlF4-. A new aluminum bridging fluorine species, Al2F7-, was also found in the molten system. The relationship between viscosity and the distribution of different (n-3) Na+center dot AlFn(n-3)- species was studied.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Mark Michaud, Wolfgang Peukert, Monica Distaso
Summary: The shape of goethite particles is controlled from needle to spindle by adjusting the sodium carbonate concentration. The formation pathway of goethite particles is studied in depth by monitoring the pH, dissolved oxygen concentration, and Raman spectroscopy. The intermediate phases of green rust and siderite are identified and correlated with the kinetics of goethite formation.
Article
Engineering, Environmental
Vladimir Zholobenko, Frank Rutten, Aleksey Zholobenko, Amy Holmes
Summary: Near-infrared spectroscopy is potentially the most powerful method for asbestos identification in construction materials, allowing for efficient discrimination and identification of different types of asbestos by focusing on specific spectral regions and optimizing instrument sensitivity and resolution.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Humanities, Multidisciplinary
Ralf Kilian, Leo Borgatta, Eberhard Wendler
Summary: This paper focuses on diagnosing the damage processes of Roman renders in the Porta Nocera necropolis in Pompeii, Italy. The tombs have been deteriorating since their excavation in 1954 due to various climatic events. Extensive on-site and laboratory diagnostics reveal that soluble salts, such as nitrates and chlorides, cause render delamination through crystallization-dilution cycles. Previous conservation strategies have been limited in effectiveness, leading the authors to propose new strategies focusing on preventive conservation and maintenance.
Article
Electrochemistry
Fei Zhu, Jianbang Ge, Yang Gao, Biwu Cai, Zichen Zhang, Feifei Jia, Shuqiang Jiao
Summary: In this study, we reported an in-situ electrochemical concentration measurement method for soluble redox species (Eu3+/Eu2+ and Sm3+/Sm2+) in molten LiCl-KCl, based on the significant natural convection in molten salts. Both simulations and experiments confirmed the presence of strong natural convection, which resulted in steady-state current during cyclic voltammetry tests at low scan rates. Interestingly, this natural convection effects provided a novel and simple approach to calculate the diffusion coefficient and concentration ratio of soluble redox species.
ELECTROCHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Xiaoru Zhang, Yonghao Ge, Minghui Liu, Yujiao Pei, Peng He, Weiling Song, Shusheng Zhang
Summary: In this study, stable Janus nanoparticles (JNPs) were successfully prepared and used for in situ SERS detection and imaging analysis of cancer cells. The results showed that this method can improve the accuracy and sensitivity of cancer diagnosis and achieve a synergistic antitumor effect of chemotherapy and photodynamic therapy.
ANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Physical
Francisco Zaera
Summary: Catalysis in industrial chemical processes has long been studied through various spectroscopic techniques like vibrational and X-ray spectroscopies, allowing for a molecular-level understanding of catalytic mechanisms. These techniques help researchers explore the intricate details of catalytic processes and advancements in the field.
JOURNAL OF CATALYSIS
(2021)
Article
Instruments & Instrumentation
Jiawei Zhang, Andreas Ruediger
Summary: Plasmonic nanoantennas play a crucial role in optical near-field scanning techniques by providing amplification and confinement of the electromagnetic field for sensitivity and spatial resolution. A semi-quantitative approach to assess plasmonic enhancement of gold tips via localized surface plasmon resonance (LSPR) without interaction with the sample is presented.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Chemistry, Analytical
Xiaoru Zhang, Yonghao Ge, Minghui Liu, Yujiao Pei, Peng He, Weiling Song, Shusheng Zhang
Summary: This study developed stable Janus nanoparticles for in situ SERS detection and imaging analysis of cancer cells, which can improve the accuracy and sensitivity of diagnosis by monitoring ATP and acid conditions. Additionally, these nanoparticles can also achieve a synergistic antitumor effect through chemotherapy/photodynamic therapy.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Shixing Zhu, Hui Jin, Zhisong Ou, Mengmeng Song, Jia Chen, Liejin Guo
Summary: In this paper, a high temperature and pressure visualization platform was used to study the hydrogen bonding degree of water in supercritical conditions. The results showed that hydrogen bonds still exist in supercritical water even at temperatures as high as 1013 K, mainly in the form of dimers and trimers. This finding is of significant importance for understanding the gasification mechanism of coal and organic matter in supercritical water.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Spectroscopy
Dina M. Bower, Clayton S. C. Yang, Tilak Hewagama, Conor A. Nixon, Shahid Aslam, Patrick L. Whelley, Jennifer L. Eigenbrode, Feng Jin, Jennifer Ruliffson, John R. Kolasinski, Alan C. Samuels
Summary: Raman spectroscopy and LIBS are complementary techniques for comprehensive characterization of geologic environments; the study aimed to distinguish different environmental regimes based on mineral and biomolecule identification in rocks and sediments; the combination of techniques successfully identified major mineral polytypes and a large diversity of biomolecules in ice-rock samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Chao Jing, Taotao Yuan, Lili Li, Jianfeng Li, Zhengxin Qian, Jing Zhou, Yifeng Wang, Shibo Xi, Nian Zhang, Hong-Ji Lin, Chien-Te Chen, Zhiwei Hu, Da-Wei Li, Linjuan Zhang, Jian-Qiang Wang
Summary: Understanding the catalysis mechanism of the sluggish oxygen evolution reaction (OER) in water splitting is crucial for the development of clean hydrogen energy. In this study, the dynamic crystal and electronic structure reconstruction of nano-sheet cobalt hydroxide was investigated using in situ Raman spectroscopy and density functional theory simulation. The correlation between OER activity and structural reconstruction thermodynamics was demonstrated, highlighting its importance in the fabrication of high-activity catalysts.
Article
Spectroscopy
Riki Zakaria, Bibin. B. Andriana, Takumu Watanabe, Anisa Maryani, Pradjna N. Paramitha, Yasmi P. Kuntana, Yukako Kusaka, Hemanth Noothalapati, Keita Iwasaki, Naoki Oshima, Kosuke Hashimoto, Hiroko Matsuyoshi, Shunji Ishihara, Tatsuyuki Yamamoto, Hidetoshi Sato
Summary: This study explores the feasibility of using Raman spectroscopic analysis for detecting eosinophil accumulation in the live esophagus. The results demonstrate that Raman spectroscopy with 785 nm-excitation has high viability and successfully discriminates eosinophil from other blood cells.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Automation & Control Systems
Marco Veneranda, Jose Antonio Manrique, Aurelio Sanz-Arranz, Sofia Julve Gonzalez, Clara Prieto Garcia, Elena Pascual Sanchez, Menelaos Konstantinidis, Elena Charro, Jose Manuel Lopez, Manuel Angel Gonzalez, Fernando Rull, Guillermo Lopez-Reyes
Summary: The SuperCam and SHERLOC instruments on the Perseverance rover are collecting Raman spectra from Mars, while the RLS instrument on the Rosalind Franklin rover is collecting spectra from subsurface samples. Chemometric tools are being developed to optimize the analysis of these spectra. Preliminary studies have shown that these tools can accurately estimate the mineral composition of Martian samples and improve the identification of minerals in remote geological targets.
JOURNAL OF CHEMOMETRICS
(2023)
Article
Environmental Sciences
Jose Maria Esbri, Carmelo M. Minang, Sofia Rivera, Mercedes Madrid-Illescas, Eva Garcia-Noguero, Ana Gonzalez-Valoys, Maite Maguregui, Hugues Thouin, Fabienne Battaglia-Brunet, Eric Gloaguen, Pablo Leon Higueras
Summary: This study focuses on Sb mobility, its transfer to biota, and its impact on soil health in a semi-arid climate. The research identifies stibnite (Sb2S3) as the primary Sb compound and observes high Sb contents in mining materials and soils. The soil-to-plant transfer of Sb is very low, and most of it remains in a residual fraction, with a negligible amount being leachable. The study suggests that the low annual rainfall rates and the scarcity of oxidized Sb compounds explain the limited Sb mobility and dispersion in the mining area, indicating a low toxicological risk associated with past mining activities.
Article
Spectroscopy
Imanol Torre-Fdez, Cristina Garcia-Florentino, Jennifer Huidobro, Leire Coloma, Patricia Ruiz-Galende, Julene Aramendia, Kepa Castro, Gorka Arana, Juan Manuel Madariaga
Summary: The presence and geochemical composition of olivine on Mars are important for studying the planet. Raman spectrometers, used in Mars 2020 and future missions, provide new possibilities to determine the Mg/Fe ratios in olivine-bearing rocks. Olivine's presence indicates past volcanic activity on Mars, and its forsterite/fayalite ratio can reveal information about the origin and evolution of the parent magma. This study proposes a new calibration model using Raman spectroscopy, greatly improving the accuracy and uncertainty associated with the forsterite/fayalite ratios compared to previous literature.
JOURNAL OF RAMAN SPECTROSCOPY
(2023)
Article
Crystallography
Silvia Perez-Diez, Cheyenne Bernier, Javier G. Inanez, Maite Maguregui
Summary: This study presents a non-invasive in situ methodology using portable elemental and molecular spectroscopic-based instrumentation to assist provenance studies of archaeological cinnabar pigments. Six cinnabar ores and a pigment from Pompeii were analyzed, and a comparative study of in-situ and laboratory results was conducted. Chemometric data treatment was performed, revealing the need for additional methodologies in the laboratory. However, this methodology was useful for classifying the ores based on mineralogical differences.
Article
Geochemistry & Geophysics
E. Clave, K. Benzerara, P. -Y. Meslin, O. Forni, C. Royer, L. Mandon, P. Beck, C. Quantin-Nataf, O. Beyssac, A. Cousin, B. Bousquet, R. C. Wiens, S. Maurice, E. Dehouck, S. Schroeder, O. Gasnault, N. Mangold, G. Dromart, T. Bosak, S. Bernard, A. Udry, R. B. Anderson, G. Arana, A. J. Brown, K. Castro, S. M. Clegg, E. Cloutis, A. G. Fairen, D. T. Flannery, P. J. Gasda, J. R. Johnson, J. Lasue, G. Lopez-Reyes, J. M. Madariaga, J. A. Manrique, S. Le Mouelic, J. I. Nunez, A. M. Ollila, P. Pilleri, C. Pilorget, P. Pinet, F. Poulet, M. Veneranda, Z. U. Wolf
Summary: Perseverance rover explored two geological units in Jezero Crater, revealing the presence of carbonates. These carbonates are identified using spectroscopic techniques and are rare, suggesting a limited carbonation of the rocks in Jezero crater.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Materials Science, Multidisciplinary
Ingrid Fitje Apneseth, Maite Maguregui, Alessandra Vichi, Francesco Caruso
Summary: This study investigates the effect of three commercial cleaning products (Baolin, Centurio, Fulgentin) on shellac-coated mahogany furniture in the Royal Palace of Norway. Non-invasive techniques, such as portable ER-FTIR spectroscopy and colorimetry, are used to assess the chemical composition and color changes of fresh and aged mahogany wood mock-ups. The results suggest that one of the cleaning products may negatively impact the long-term preservation of this furniture collection.
Article
Geography, Physical
Jennifer Huidobro, Julene Aramendia, Gorka Arana, Elisabeth M. Hausrath, Juan Manuel Madariaga
Summary: Raman spectra of gypsum, syngenite, and gorgeyite powders were analyzed at different temperatures. The main bands of the three sulfates shifted towards higher wavenumbers with decreasing temperature, indicating stronger bonds and higher energy. However, the behavior of -OH bands varied depending on the crystal structure acquired at different temperatures. The -OH bands of gypsum became narrower and sharper with decreasing temperature, indicating a more ordered crystalline structure.
ANNALS OF GLACIOLOGY
(2023)
Article
Archaeology
P. Irizar, O. Gomez-Laserna, G. Arana, J. M. Madariaga, I. Martinez-Arkarazo
Summary: This research investigates the potential of agar hydrogels loaded with ionic liquids (ILs) as a sustainable and gentle cleaning method for built heritage conservation. The results demonstrate that ILs can effectively remove iron and copper stains while also inhibiting microbial growth. This study showcases the potential of IL-loaded agar hydrogels as an innovative approach in the field of built heritage conservation.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Archaeology
Eugenia Tomasini, Ilaria Costantini, Valeria Careaga, Carlos Rua Landa, Kepa Castro, Juan Manuel Madariaga, Marta Maier, Gabriela Siracusano
Summary: Research on the materiality of Andean Colonial artistic heritage provides insights into the cultural and social history of the region. This study examines a hidden mural painting in a church in Bolivia using interdisciplinary and multi-analytical approaches. The identification of pigments and painting techniques revealed the use of local materials by Andean painters, as well as their adaptation of traditional European practices. This knowledge contributes to the conservation and preservation of similar artworks in the Andean region.
JOURNAL OF CULTURAL HERITAGE
(2023)
Review
Geosciences, Multidisciplinary
Mark A. Sephton, Jonathan S. W. Tan, Jonathan S. Watson, Keyron Hickman-Lewis, Juan M. Madariaga
Summary: The search for organic biomarkers on Mars is a high-priority goal for past, present, and future missions. Thermal extraction is the most popular in situ analysis technique, but it faces challenges when analyzing mineral-organic mixtures. Potential mitigations are suggested for future experiments, which can be used both on Mars and on returned samples on Earth.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Ilaria Costantini, Julene Aramendia, Nagore Prieto-Taboada, Gorka Arana, Juan Manuel Madariaga, Juan Francisco Ruiz
Summary: In this study, micro-samples from a rock art site in Spain were analyzed to understand the conservation state of the painted panel and to confirm the efficacy of a desalination treatment. Various techniques were used for characterization, revealing the presence of dolomitic limestone, silicon aggregates, aluminosilicates, iron oxides, and sulfate compounds. The analysis also showed evidence of biological activity and the presence of calcium oxalates, which likely contribute to the preservation of the pictographs. The presence of carotenoid pigments and the intentional use of hematite for painting were also identified.
Article
Astronomy & Astrophysics
M. Veneranda, J. A. Manrique, G. Lopez-Reyes, S. Julve-Gonzalez, F. Rull, C. Alvarez Llamas, T. Delgado Perez, E. Gibbons, E. Clave, E. Cloutis, J. Huidobro, K. Castro, J. M. Madariaga, N. Randazzo, A. Brown, P. Willis, S. Maurice, R. C. Wiens
Summary: The SuperCam instrument on Mars 2020 Perseverance rover utilizes multiple spectroscopic techniques to investigate Martian geological targets and proposes the use of multivariate analysis to optimize its capability in discriminating mineral phases. Laboratory study of carbonate phases was conducted and the discrimination capability of Raman, VISIR, and LIBS data sets was evaluated. Low-level and mid-level data combination strategies were utilized to improve mineral classification accuracy.
EARTH AND SPACE SCIENCE
(2023)
Article
Construction & Building Technology
Idoia Etxebarria, Marco Veneranda, Ilaria Costantini, Nagore Prieto-Taboada, Aitor Larranaga, Cristina Marieta, Bruno De Nigris, Alberta Martellone, Valeria Amoretti, Gorka Arana, Juan Manuel Madariaga, Kepa Castro
Summary: The aim of this research is to assess the potential use of ashes and lapilli found in Pompeii as pozzolanic material for conservation mortars. XRD analyses showed that the mineral composition of these volcanic products is similar to the original pozzolanic mortars at the archaeological site. The strength of the lapilli-based mortars was higher than that of commercial pozzolan, and replacing silica sand with volcanic aggregates further improved the mechanical properties.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)