Article
Materials Science, Multidisciplinary
L. Torrisi, M. Cutroneo, L. Silipigni, A. Torrisi
Summary: During the laser ablation of graphene oxide target, the plasma characterization has been obtained, revealing the ion species and charge states, as well as the average temperature and density. The ablation yield and the emitted mass yields increase with the laser fluence, along with elevated plasma density, temperature, and velocity of emitted particles. Laser heating results in reduction of graphene oxide and emission of oxygen in elemental and functional group forms, indicating the presence of water and hydrogen in the graphene oxide.
Article
Optics
Xin Peng, Minsun Chen, Hao Liu
Summary: We conducted a non-contact optical investigation on laser-induced plasma under moderate Ar pressure (ranging from 1 to 100 Pa). At the pressure of 20 Pa, we observed significant shock front and spatial fractionation among different charged ions. Collisions between Si IV ions and ambient Ar atoms result in the generation of distinct and excited Ar II ions, fresh Si III ions, and electrons at the dense layer. Furthermore, we found that the electron density peaks at the position of the shock front, suggesting that the collision process leading to electron generation dominates over the recombination process in the shock layer and its immediate vicinity.
CHINESE OPTICS LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Jan Hahn, Manuela Moritz, Hannah Voss, Penelope Pelczar, Samuel Huber, Hartmut Schlueter
Summary: Recent studies have shown that nanosecond infrared lasers are effective for tissue sampling and homogenization, suitable for mass spectrometric proteomics research. Liquid chromatography tandem mass spectrometry analysis revealed significant abundance differences in proteins between two tissue types.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Optics
Ana Gomez-Varela, Raul Sanchez, Bastian Carnero, Luis Diaz-Gomez, M. Teresa Flores-Arias, Carmen Bao-Varela
Summary: Subaquatic indirect Laser-Induced Plasma-Assisted Ablation (SLIPAA) is proposed as a laser-based technique for glass processing. It utilizes a combination of ablation mechanism, shock waves, and cavitation bubbles, assisted by a water layer, to produce higher depth structures in glass with rectangular cross-sectional profiles.
Article
Agriculture, Multidisciplinary
Chizumi Abe, Ye Zhang, Kazuhiro Takao, Kuni Sasaki, Koji Ochiai, Toshiro Matsui
Summary: This study visually investigated the dynamic production of soybean phytoalexins glyceollins in germinating soybeans inoculated with Aspergillus oryzae using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) imaging. The results showed that glyceollins were only produced in the seed coat and germinated root regions of soybeans, and inoculation of inactivated fungi also promoted glyceollin production, suggesting a possible association with the fungus body.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Physics, Applied
Yuta Tanaka, Shinji Tsuneyuki
Summary: The microscopic mechanism of metal ablation induced by ultrashort laser pulse irradiation is investigated. A two-temperature model scheme combined with molecular dynamics (TTM-MD) is developed to incorporate electronic entropy effects into the simulation of metal ablation while satisfying the energy conservation law. Simulation with the TTM-MD scheme reveals that ultrashort laser pulse irradiation near the ablation threshold causes high-energy atom/ion emission and sub-nanometer depth ablation, as observed experimentally, due to the electronic entropy effect. It is also shown that the electronic entropy effect is also significant in spallation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Nikita Medvedev, Jaromir Chalupsky, Libor Juha
Summary: The study investigates the behavior of PMMA exposed to femtosecond pulses of extreme ultraviolet and X-ray laser radiation, revealing the nonthermal hydrogen decoupling triggering ultrafast fragmentation of PMMA and the formation of a metallic liquid with complete atomic disorder as the dose increases. The estimated ablation threshold and crater depth functions of fluence align well with experimental data.
Review
Materials Science, Multidisciplinary
Stefan Andrei Irimiciuc, Sergii Chertopalov, Jan Lancok, Valentin Craciun
Summary: The Langmuir probe method is a versatile real-time in situ diagnostic tool for laser ablation and PLD, providing insights into plasma diagnostics. However, its theoretical adaptation may sometimes lead to misinterpretation of data.
Article
Chemistry, Physical
Bojidarka Ivanova, Michael Spiteller
Summary: This paper introduces a simplified formula for solid-state 3D structural analysis using matrix assisted laser desorption/ionization mass spectrometry. The formula provides a universal law for analyzing the behavior of analyte peaks in solution and connects the stochastic dynamic diffusion parameter with variable intensity. The formula has been shown to accurately reflect analyte concentration and provide information about molecular and electronic structure. Its application to MALDI-MS phenomena is explored, demonstrating its advantages over other existing theories and equations.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
S. Ozcelik, B. Yalcin, L. Arda, H. Santos, R. Saez-Puche, L. A. Angurel, G. F. de la Fuente, B. Ozcelik
Summary: This study investigated the structural features, magnetic behavior, photocatalytic properties, and blood compatibility of NiFe2O4 nanoparticles obtained by subnanosecond laser ablation in water. The pseudo-second-order model was found to be the most suitable to interpret the photocatalytic degradation mechanism of these nanoparticles. Hemolysis tests showed that the biologically safe concentration of NiFe2O4 nanoparticles was below 0.01 mg/ml.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Leonardo Tadeu Boaes Mendonca, Arandi Ginane Bezerra Jr, Walter Mendes de Azevedo
Summary: In this study, a nanocomposite of vanadium pentoxide and polyaniline (V2O5/PANI) was successfully synthesized using laser ablation in water. The interlayer spacing of V2O5 shifted from 7.95 to 13.6 angstrom due to polyaniline intercalation, and the presence of H2O2 during ablation process altered the morphology of the samples. The polymer growth was oriented parallel to V2O5 lamellae in V2O5/PANI samples, while fibers were observed in V2O5(H2O2)/PANI.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Review
Toxicology
Joshua Klingberg, Bethany Keen, Adam Cawley, Daniel Pasin, Shanlin Fu
Summary: This paper reviews the novel applications of HRMS techniques in the analysis of NPS, including the identification of usage trends in the community through wastewater analysis and the examination of the effects of drugs of abuse on endogenous compounds using metabolomic approaches.
ARCHIVES OF TOXICOLOGY
(2022)
Article
Optics
Sungkwon Shin, Woojin Lee, Jong Kab Park, Doh-Hoon Kim
Summary: This paper presents a femtosecond laser processing method to precisely control taper angles of micro-holes. The ablation depth depends on the ablation rate, number of repetitions for scanning, beam size, and spot overlap ratio, which in turn influence the taper angles. We developed a multilevel material processing method involving analytical models to achieve desired taper angles on 64FeNi alloy sheets.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Khaled A. Elsayed, Munther Alomari, Q. A. Drmosh, Abdullah A. Manda, Shamsuddeen A. Haladu, Ibrahim Olanrewaju Alade
Summary: This work reports the synthesis of TiO2 nanowires decorated with Au nanoparticles by pulsed laser ablation technique for anticancer applications. The results show that the decoration of TiO2 nanowires with Au nanoparticles significantly enhanced the anticancer activities against breast cancer and cervical cancer cells. Therefore, the TiO2-Au nanocomposite prepared using pulsed laser ablation could potentially be used to inhibit the growth of cancerous cells.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Bo Sung Shin, Sungmoo Hong, Jinsu Kim, Junuk Lee, Sungyeob Jung
Summary: This study investigates the characteristics of laser-induced graphene (LIG) generated on a polyimide film with different laser processing parameters. The surface morphology of LIGs is found to be related to their performance. By altering the processing parameters, LIGs with different colors and shapes can be produced, which has significant implications for sensor applications.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Analytical
Davide Spanu, Gilberto Binda, Marcello Marelli, Laura Rampazzi, Sandro Recchia, Damiano Monticelli
Summary: The proposed method utilizes laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) to quantitatively determine the spatial distribution of metal nanoparticles (NPs) on planar substrates, achieving high spatial resolution and sensitivity.
Article
Chemistry, Analytical
Alessandra Botteon, Wang-Hyo Kim, Chiara Colombo, Marco Realini, Chiara Castiglioni, Pavel Matousek, Byung-Man Kim, Tae-Hyuk Kwon, Claudia Conti
Summary: This study demonstrates the ability to monitor the dye depth profile within the light active layer of dye-sensitized solar cells using a non-destructive/non-invasive Raman method, micro-spatially offset Raman spectroscopy (micro-SORS). The results show that micro-SORS can accurately discriminate between homogeneous and inhomogeneous dye depth profiles, and its analysis is reliable compared to destructive time-of-flight secondary ion mass spectrometry measurements.
ANALYTICAL CHEMISTRY
(2022)
Article
Humanities, Multidisciplinary
Kaare Lund Rasmussen, Johannes van der Plicht, Ilaria Degano, Francesca Modugno, Maria Perla Colombini, Guillermo de la Fuente, Thomas Delbey, Amos Frumkin, Uri Davidovich, Roi Porat, Orit Shamir, Naama Sukenik, Greg Doudna, Joan Taylor, Mladen Popovic
Summary: This study reports on interdisciplinary archaeometrical analyses of objects found in the Christmas Cave, revealing the history and cultural background of the cave. The study found evidence of human occupation or visitation in the cave from around 4000 BCE to the Medieval period, including a refuge episode connected to the First Jewish Revolt. The results highlight the importance of archaeometric studies in cave environments where stratigraphy is absent.
Article
Anthropology
Jacopo La Nasa, Ilaria Degano, Francesca Modugno, Camilla Guerrini, Federica Facchetti, Valentina Turina, Andrea Carretta, Christian Greco, Enrico Ferraris, Maria Perla Colombini, Erika Ribechini
Summary: The burial assemblage of Kha and Merit discovered in 1906 and now preserved at the Museo Egizio constitutes the most abundant, complete, and well-preserved non-royal Egyptian burial assemblage ever found. A study shows that volatile compounds emitted by organic materials in vessels can be analyzed and detected directly in museums using a transportable mass spectrometer. This research proves the reliability of this method for archaeometric investigations in museums.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Giancarlo Ranalli, Alessia Andreotti, Maria Perla Colombini, Cristina Corti, Giuseppe Lima, Laura Rampazzi, Gabriella Saviano, Domenico Vitullo, Davide Palmieri, Elisabetta Zanardini
Summary: This study investigates the ability of isolated microorganism A. infectoria NIS4 strain to induce alterations and degradation in a carbographic ribbon. The results indicate that this fungus can grow rapidly and abundantly under favorable environmental conditions, leading to a decline in the quality of the ribbon.
JOURNAL OF APPLIED MICROBIOLOGY
(2022)
Article
Spectroscopy
Chiara Castiglioni, Alessandra Botteon, Claudia Conti, Matteo Tommasini, Pavel Matousek
Summary: This study introduces an analytical physical description of micro-spatially offset Raman spectroscopy (micro-SORS) experiments in turbid samples and highlights its use for studying the penetration depth of chemical species into a matrix. The study demonstrates the relationship between the Raman intensity ratio and the concentration profiles of the analytes using a physical model and Monte Carlo simulation. The obtained formulas provide insights for interpreting micro-SORS data and comparing different samples.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Biochemistry & Molecular Biology
Davide Spanu, Alessandro Palestra, Veronica Prina, Damiano Monticelli, Simone Bonanomi, Sandro Usseglio Nanot, Gilberto Binda, Laura Rampazzi, Gianluca Sessa, David Callejo Munoz, Sandro Recchia
Summary: The unsuitability of microwave-assisted acid digestion followed by ICP-MS analysis for quantifying trace elements in ultrapure SiC was demonstrated due to contamination from memory effects of PTFE microwave vessels and the purity levels of acids. A new analytical protocol using LA-ICP-MS was found to be more effective, especially when the SiC samples were embedded in epoxy resin. The optimized protocol allows for accurate determination of elements at sub-mg/kg levels.
Article
Chemistry, Physical
Ludovico Geminiani, Francesco Paolo Campione, Carmen Canevali, Cristina Corti, Barbara Giussani, Giulia Gorla, Moira Luraschi, Sandro Recchia, Laura Rampazzi
Summary: In order to manage a collection of historical silks, it is important to detect whether degumming has been performed. 32 samples of silk textiles from traditional Japanese samurai armors were analyzed to distinguish between hard and soft silk using a non-invasive analytical protocol based on ER-FTIR spectroscopy. This innovative approach can have industrial applications too.
Article
Chemistry, Analytical
Sara Calandra, Claudia Conti, Irene Centauro, Emma Cantisani
Summary: We demonstrate a non-destructive and effective method to distinguish between geogenic and anthropogenic calcite for the first time. Geogenic calcite comes from natural sedimentary and metamorphic rocks, while anthropogenic calcite is artificially formed through the carbonation process in mortars and plaster lime binders. This distinction is crucial in several fields and has been addressed in this paper using high-resolution micro-Raman spectroscopy combined with data mining and machine learning methods.
Article
Humanities, Multidisciplinary
Cristina Corti, Sila Motella De Carlo, Laura Rampazzi
Summary: This study proposes a fast screening method using ATR-mode infrared spectroscopy to analyze cremation slags from two Iron Age cremation necropolises in Padua, northern Italy. The results identified multiple types of cremation slags within each pyre ground and revealed bone fragments exposed to different levels of combustion during cremation. This research provides valuable data for understanding the details of funeral rituals and the effects of fire during the accumulation of pyre debris.
Article
Humanities, Multidisciplinary
Ludovico Geminiani, Francesco Paolo Campione, Cristina Corti, Moira Luraschi, Sila Motella, Sandro Recchia, Laura Rampazzi
Summary: This paper presents the limitations and potential of ATR-FTIR spectroscopy in the study of cellulosic textile collections. It discusses the differentiation of natural fibers based on their lignin, pectin, hemicellulose, and wax content. The spectral differences caused by environmental humidity and plant composition are reviewed, and diagnostic bands are proposed for discriminating fibers from different plants. The paper also considers the impact of aging on fiber recognition and discusses the potential of ATR-FTIR spectroscopy in distinguishing natural and modified fibers when coupled with SEM observations.
Article
Biochemical Research Methods
Marco Pinna, Arianna Signorelli, Gilberto Binda, Carlo Dossi, Laura Rampazzi, Davide Spanu, Sandro Recchia
Summary: This article introduces a clean and safe microwave-assisted digestion procedure for ultra-trace analysis. The procedure involves the evaporative migration of HF inside a sealed vessel-inside-vessel system, allowing for the efficient removal of HF and overcoming the issues associated with traditional evaporation methods.
METHODS AND PROTOCOLS
(2022)
Article
Humanities, Multidisciplinary
Anna Lluveras-Tenorio, Alessia Andreotti, Fabio Talarico, Stefano Legnaioli, Luca M. Olivieri, Maria Perla Colombini, Ilaria Bonaduce, Simona Pannuzi
Summary: The research investigates the materials and techniques of Gandharan art through chemical analysis of samples taken from stucco architectural decorations, shedding light on ancient painting techniques and artistic technologies. The aim is to understand the influences exerted on this Buddhist ancient art from Eastern and Western artistic traditions.
Article
Humanities, Multidisciplinary
Ludovico Geminiani, Francesco Paolo Campione, Cristina Corti, Sila Motella, Laura Rampazzi, Sandro Recchia, Moira Luraschi
Summary: The study of metallic threads from Japanese samurai armors revealed significant variability in metal foils and organic adhesives, as well as differences in the use of gold, silver, and aluminum in traditional Japanese kinran materials. The research provided a comprehensive understanding of the materials and techniques used by Japanese craftsmen over the centuries.
