Article
Materials Science, Multidisciplinary
Mariona Tarrago, Charles Le Losq, Thibaut Robine, Solenn Reguer, Dominique Thiaudiere, Daniel R. Neuville
Summary: In this study, experiments were conducted to investigate the valence state of titanium in silicate glasses under high temperatures and reduced conditions. It was found that titanium remained tetravalent and showed crystallization behavior instead of becoming trivalent. Furthermore, the use of reduced gas mixtures was explored as a novel method to induce surface crystallization and produce ceramic-coated glass materials.
Review
Chemistry, Inorganic & Nuclear
Shiv Kumar Pal, Neeraj Mehta, V. Mikla, A. A. Horvat, V. V. Minkovich, A. Dahshan
Summary: The article explores the phenomenon of physical aging in amorphous solids, focusing on the case of chalcogenide glasses and the effects of long-term aging and anti-aging properties of arsenic. Through case studies and analysis of Arsenic Tri-Selenide glass, the impact of physical aging on properties such as thermal stability, Vickers hardness, and density is investigated using various techniques. The review also discusses recent advances and current status in the study of physical aging effects.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Jintara Padchasri, Amorntep Montreeuppathum, Sumeth Siriroj, Jidapa Lomon, Wipada Senanon, Kanjana Thumanu, Yingyot Poo-arporn, Supree Pinitsoontorn, Narong Chanlek, Pinit Kidkhunthod
Summary: This study carefully investigates the single Mn and Co doping to dual Co and Mn ions in lithium sulphate (Li2S) borate-based glasses system as a new glass cathode for future Li-ion battery. The B-O bonding in glass network and the oxidation states of Co, Mn, and S ions in the glass structure are analyzed using synchrotron-based IR spectroscopy and XANES. It is found that the 3Mn5Co glass composition exhibits the highest specific capacitance value of 121.12 F g(-1), indicating a better enhancement of electrochemical properties compared to single doping.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Chemistry, Organic
Heinz Langhals, Christian Dietl
Summary: Dyads of chromophores with orthogonal transition moments and sequences of aliphatic cage-structures as spacers were prepared, where resonance energy transfer (FRET) occurred even up to a distance of 58 angstrom contrary to Fo''rster's theory. The distance dependence of the efficiency was re-examined using various functions, and it was found that the commonly used R-6 dependence gave acceptable results, although a slightly larger exponent was more useful for practical applications.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
K. M. Neethu, Kritika Nag, Arif Hassan Dar, Ashima Bajaj, S. Arya Gopal, Vijayendran Gowri, Mithilesh Nagpure, Shaifali Sartaliya, Raina Sharma, Arun Kumar Solanki, Md. Ehesan Ali, Azhagumuthu Muthukrishnan, Govindasamy Jayamurugan
Summary: The formation of 1,1,4,4-tetracyanobuta-1,3-dienes (TCBDs) and new heterocyclic compounds through cycloaddition-retroelectrocyclization (CA-RE) reactions were observed in the aqueous phase, by varying the surfactant nature and concentrations. The self-assembled environment induced by the substrate and surfactant molecules allowed for new reactivity and selective production of TCBDs and heterocycles using H2O as a green solvent.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Physical
C. S. Sarumaha, J. Rajagukguk, N. Chanthima, P. Kidkhunthod, N. Chanlek, P. Kantuptim, T. Yanagida, H. J. Kim, J. Kaewkhao
Summary: This study fabricated glass samples with a composition of 20Li2O-10AlF3-2.5R-(57-x)P2O5-10Gd2O3-0.5CeF3 (R = 0, NaF, KF) using the melt quenching technique. Various analyses, including density, molar volume, refractive index, FTIR spectra, transmittance spectra, decay time analysis, and photo and radioluminescence properties, were conducted. Surface-sensitive techniques (XPS and XANES) were utilized. It was found that the addition of alkali fluoride broke the Q2 tetrahedral sites of the phosphate structure in the glass samples. Promising scintillation properties were observed in the PLGdAfKfCe0.5 glass.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Wipada Senanon, Phornchanok Phaiboon, Narong Chanlek, Yingyot Poo-arporn, Supree Pinitsoontorn, Santi Maensiri, Jessada Khajonrit, Pinit Kidkhunthod
Summary: The study successfully synthesized Li2S-2H(3)BO(3) glasses with and without 4 mol% MnO2 dopant. The doped glasses showed improved magnetic and electrochemical properties, especially in pseudocapacitance. Additionally, the application of XRD, TEM, UV-Vis, and XANES techniques provided new insights into the properties of the glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
R. O. Alekseev, L. A. Avakyan, G. Yu. Shakhgildyan, G. A. Komandin, V. I. Savinkov, N. A. Romanov, A. A. Veligzhanin, S. P. Lebedev, A. M. Ermakova, G. B. Sukharina, L. A. Bugaev, V. N. Sigaev
Summary: The study investigated the relationship between composition and structural features of high refractive glasses in the La-Nb-B system. It was found that the refractive index of the glasses could be tuned by changing the Nb2O5 content, with niobium atoms maintaining octahedral oxygen coordination and lanthanum coordination number being versatile. The interatomic distance values indicated that niobium octahedra in the glass network are connected only by corners.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Geochemistry & Geophysics
Masashi Shidare, Ryoichi Nakada, Tomohiro Usui, Minato Tobita, Kenji Shimizu, Yoshio Takahashi, Tetsuya Yokoyama
Summary: The study investigated sulfur speciation in impact glasses of three basaltic shergottites from Mars, revealing that sulfate minerals in EETA79001 and LAR 06319 likely originated from the reduced igneous host rock on Mars, while sulfate in Dhofar 019 was more likely from terrestrial alteration. The findings suggest that ancient Martian water reservoirs may have already been oxic, leading to the formation of sulfate minerals through water-rock interactions.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Materials Science, Ceramics
Laurence Galoisy, Georges Calas
Summary: This study presents a comparative spectroscopic investigation on the speciation of nickel in binary alkali borate glasses. The coordination number of nickel is found to be related to the composition of the glass, while the spectroscopic properties of each coordination state of nickel show similarities among different glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Pierrick Chevreux, Laurent Tissandier, Annabelle Laplace, Tonya Vitova, Sebastian Bahl, Fabienne Le Guyadec, Etienne Deloule
Summary: The study investigated the solubility of uranium in aluminosilicate melts with different Na/Ca ratios, revealing the behavior of uranium under various redox conditions. A method to determine the proportion of each uranium oxidation state in the glass sample was proposed based on the findings, with U-VI, U-V, and U-IV species being characterized for the first time in glass samples. The results showed that uranium solubility decreased with decreasing oxygen fugacity, but was enhanced by the U-VI concentration in the melt under higher oxygen fugacity.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Physics, Condensed Matter
Koun Shirai, Kota Watanabe, Hiroyoshi Momida
Summary: This paper presents a non-empirical method for calculating the specific heat of glasses during the transition, and verifies its effectiveness. By decomposing the specific-heat jump into contributions from structural, phonon, and thermal expansion energies, a clear energy diagram for glass transition is obtained. The study also verifies the empirical relationship between fragility and specific-heat jump.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Remote Sensing
Xue Zhang, Jiaguo Li, Yanyang Hu, Li Zhu, Ning Zhang
Summary: This study analyzed the correlation between spectra and water quality parameters, revealing significant relationships between Secchi depth and ammonia nitrogen with the black-odorous water (BOW) spectrum. The results provide important guidance and application value for using remote sensing to manage urban BOW.
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2021)
Article
Polymer Science
Boran Ma, Nicholas J. Finan, David Jany, Michael E. Deagen, Linda S. Schadler, L. Catherine Brinson
Summary: The NanoMine database is a new materials data resource that collects annotated data on polymer nanocomposites (PNCs), showcasing its potential to assist fundamental materials understanding and rational materials design. This case study focuses on the relationship between the change in glass transition temperature (Delta T (g)) and key descriptors of nanofillers and polymer matrix in PNCs. Using data from over 2000 experimental samples curated into NanoMine, a decision tree classifier was trained to predict the sign of PNC Delta T (g) and a multiple power regression metamodel was built to predict Delta T (g). The successful model utilizes key descriptors such as composition, nanoparticle volume fraction, and interfacial surface energy, demonstrating the power of aggregated materials data for insight and predictive capability.
Article
Chemistry, Physical
L. Rogstrom, M. Moreno, J. M. Andersson, M. P. Johansson-Joesaar, M. Oden, K. Klementiev, L-A Naslund, M. Magnuson
Summary: Changes in the structure of Ti1-xAlxN coated tool inserts used for turning in 316L stainless steel were examined using XANES, EXAFS, EDS, and STEM. XANES spectra indicated the formation of TiN-enriched domains in coarse-grained Ti1-xAlxN coatings with varying Al-content. XANES Ti 1s line-scans revealed that spinodal decomposition resulted in the formation of TiN-enriched domains during turning in Ti0.47Al0.53N and Ti0.38Al0.62N samples. EDS analysis showed the adherence of Cr and Fe from the steel to the tool rake face during machining.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
E. Michailidou, P. Visser, J. M. C. Mol, A. Kosari, H. Terryn, K. Baert, Y. Gonzalez -Garcia
Summary: The corrosion inhibiting effect of lithium carbonate has been studied under atmospheric corrosion conditions at the polymer/metal interface. It is found that lithium carbonate offers optimal corrosion protection under moderately alkaline conditions by forming a protective layer identified as aluminum-lithium layered double hydroxide. The presence of lithium carbonate triggers an active-to-passive transition, where anodic dissolution of the aluminum matrix is a crucial step before the formation of the protective layer. The resulting protective layer uniformly covers the surfaces of AA2024-T3 and lithium-containing AA2198-T8, preventing further corrosion reactions.
Article
Engineering, Electrical & Electronic
Agnieszka Gierej, Kurt Rochlitz, Adam Filipkowski, Ryszard Buczynski, Sandra Van Vlierberghe, Peter Dubruel, Hugo Thienpont, Thomas Geernaert, Francis Berghmans
Summary: We have prepared and characterized microstructured biodegradable and biocompatible polymer optical fibers using commercially available poly(D,L-lactic acid) (PDLLA). The preparation of preforms by transfer molding and fiber manufacturing was reported and the influence of polymer processing on the molar mass decrease of PDLLA was investigated. The in vitro degradation of the fabricated fibers in phosphate buffered saline (PBS) was studied, showing molar mass loss of 21%, 25%, and 43% over 105 days for fibers with diameters of 400, 200, and 100 μm, respectively. Cutback measurements revealed an attenuation coefficient of 0.065 dB/cm at 898 nm for a microstructured fiber with a diameter of 219 +/- 27 μm. After immersion in PBS at 37 degrees C, the optical loss increased by 0.4 dB/cm at 950 nm after 6 h and by 0.8 dB/cm after 17 h.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Wendy Meulebroeck, Mathilde Patin, Karin Nys, Hugo Thienpont
Summary: There is a need to understand the link between the optical spectrum and technology parameters of silver-staining. The study conducted experiments on samples with known fabrication conditions, comparing optical and chemical methods to identify the measures that match material properties. The research resulted in a flowchart scheme for non-destructive assessment of silver-staining technology and its potential application in different glass families.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Kristof Marcoen, Melanie Gauvin, Ansbert De Cleene, Jacob Obitso Nielsen, Kitty Baert, Herman Terryn, Joost De Strycker, Tom Hauffman, Karen Pantleon
Summary: Electrodeposition of Fe-C coatings from an environmentally friendly iron sulfate electrolyte with citric acid as a carbon source has attracted attention due to their excellent mechanical properties. However, the chemical constitution of the coatings, including the type and location of carbon-containing phases, is not well understood. In this study, advanced spectroscopic techniques were used to identify three carbon-containing phases that were uniformly distributed in the nanocrystalline ferrite base material. These phases, including iron acetates, amorphous carbon, and carbides, were found in both as-deposited and annealed Fe-C coatings up to 300 degrees C.
SURFACE AND INTERFACE ANALYSIS
(2023)
Article
Engineering, Electrical & Electronic
Ikuo Arata, Hirotoshi Terada, Michael Vervaeke, Dries Rosseel, Hugo Thienpont
Summary: In this study, a gallium arsenide (GaAs) aspherical solid immersion lens (SIL) has been developed for semiconductor failure analysis. The SIL significantly increases the numerical aperture and spatial resolution of a microscopy system by attaching it to the backside of the device-under-test. To improve the spatial resolution, a shorter wavelength light source is used. The use of GaAs as SIL material enables the use of shorter wavelengths, and an aspherical design corrects spherical aberration, resulting in diffraction limited performance for semiconductor failure analysis.
MICROELECTRONICS RELIABILITY
(2023)
Article
Chemistry, Analytical
Lien Smeesters, Jef Verbaenen, Luca Schifano, Michael Vervaeke, Hugo Thienpont, Giancarlo Teti, Alessio Forconi, Filippo Lulli
Summary: This study proposes a novel five-channel multispectral camera design suitable for autonomous and continuous crop monitoring. It covers visible, near-infrared, and thermal wavelength bands, allowing the sensing of various vegetation indices. The wide-field-of-view imaging design exceeds 164 degrees, providing a larger field of view compared to drone-sensing systems.
Article
Chemistry, Analytical
Olga Rusyakina, Thomas Geernaert, Mederic Loyez, Maxime Lobry, Karima Chah, Pawel Mergo, Hugo Thienpont, Christophe Caucheteur, Francis Berghmans, Tigran Baghdasaryan
Summary: We address the challenge of spectral multiplexing of biosensors in a single optical fiber by combining photonic crystal fibers (PCF) with fiber Bragg grating technology. We utilize the optical transmission spectrum of a straight fiber Bragg grating in a PCF to excite cladding mode resonances, enabling plasmonic label-free biodetection of HER2 protein. Our PCF sensor can detect a protein concentration of 8.62 nM with high reproducibility.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Multidisciplinary Sciences
Mehrdad Lotfi Choobbari, Jennifer Ferguson, Niko van den Brande, Tim Smith, Tatevik Chalyan, Wendy Meulebroeck, Heidi Ottevaere
Summary: The blending of different polymers has long been used in the plastic industry. However, research on microplastics has mainly focused on particles made of single polymers. This study focuses on the blending of Polypropylene (PP) and Low-density Polyethylene (LDPE), two commonly used polymers, and applies 3-D Raman mapping to visualize their distribution and estimate concentrations. The precision of the quantitative analysis is evaluated using a parameter called the concentration estimate error (CEE). Additionally, the impact of different excitation wavelengths and a line-shaped laser beam profile on measurement time are investigated.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Michael Hillen, Seppe Sels, Bart Ribbens, Simon Verspeek, Koen Janssens, Geert van der Snickt, Gunther Steenackers
Summary: When studying paintings with active infrared thermography (IRT), lock-in thermography (LIT) showed advantages over pulse thermography (PT) in minimizing temperature fluctuations and providing higher contrast and less noise in phase images. However, PT was better at showing the upper paint layer, which is important for observing subsurface defects or the support structure. The influence of camera spectral range on the results was also investigated, with the addition of a long-pass filter eliminating direct reflection artifacts caused by halogen light sources when using a mid-wave infrared (MWIR) camera.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Sara Abbasi, Mehdi Feizpour, Ilse Weets, Qing Liu, Hugo Thienpont, Francesco Ferranti, Heidi Ottevaere
Summary: Identifying hemoglobinopathies is crucial for managing clinical diseases. This study demonstrates the potential of Raman spectroscopy in combination with high-performance liquid chromatography for accurate identification of different hemoglobin types.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Ermanno Avranovich Clerici, Steven de Meyer, Frederik Vanmeert, Stijn Legrand, Letizia Monico, Costanza Miliani, Koen Janssens
Summary: This study examines the chromatic alteration of various paint types on mural painting fragments from The Upper Basilica of Saint Francis of Assisi in Italy using synchrotron radiation. The fragments are from ceiling paintings attributed to Cimabue and Giotto, with different discoloration in white, blue/green, and brown/yellow/orange areas. X-ray fluorescence and diffraction maps were collected from the fragments, and paint cross-sections were analyzed using microscopic X-ray fluorescence and powder diffraction mapping. The study identified numerous secondary products on the painted surfaces, including copper tri-hydroxychloride, corderoite, calomel, plattnerite, scrutinyite, whewellite, and weddellite.
Editorial Material
Spectroscopy
Koen Janssens
X-RAY SPECTROMETRY
(2023)
Article
Optics
Artem Shcheglov, Yunfeng Nie, Hugo Thienpont, Heidi Ottevaere
Summary: Recently, there is a growing trend for cost-effective, portable spectrometers to be applied in various fields, including scientific research, food safety, and air pollution analysis. In this study, we propose a miniaturized, two-channel, broadband spectrometer based on variable-spacing concave gratings, which integrates imaging optics and diffraction gratings into a single component. The design allows for a small volume and high spectral resolution, and simulation results demonstrate optical resolutions of less than 1.6 nm in the visible channel and less than 3.1 nm in the near-infrared channel. To validate the feasibility for mass production, we successfully manufactured the variable-spacing concave gratings using diamond tooling and hot embossing replication. The fabricated grating replicas exhibit high diffraction efficiency in both channels. Experimental results of the prototype show a good match in spectral resolution with the nominal design.
JOURNAL OF OPTICAL MICROSYSTEMS
(2023)
Proceedings Paper
Optics
F. Duerr, H. Thienpont
Summary: Today's optical design of imaging systems heavily relies on efficient ray tracing and optimization algorithms. However, the traditional design approach often requires extensive experience, intuition, and trial-and-error guesswork. We propose a novel method that allows systematic generation and evaluation of directly calculated imaging optics design solutions, enabling a rigorous and real-time evaluation in solution space. The method is based on differential equations derived from Fermat's principle and can calculate optical surface coefficients to minimize image blurring for each individual aberration order.
OPTICAL DESIGN AND TESTING XII
(2023)
Article
Chemistry, Analytical
Gang Qu, Yuxin Zhao, Qiaoli Zhang, Jina Wu, Xiaosen Li, Yang Yang, Shilei Liu
Summary: In this study, magnetic mesoporous materials combined with real-time in situ mass spectrometry were used for the high-throughput detection of hydrolyzed products of organophosphorus nerve agents. The method showed good linearity, low limits of detection and quantification, and high extraction recoveries. The magnetic preparation method used was quick, cost-effective, rugged, and safe. The results demonstrated the potential of this method for rapid and efficient determination of the target analytes in environmental samples.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Anna Hildebrand, Mariam Merchant, Danny O'Hare
Summary: Substandard and falsified artemisinin derivatives in antimalarials have caused significant deaths and economic losses. This study evaluates the feasibility of voltammetric methods for identifying and quantifying artemether. The findings suggest that electrochemical analysis shows promise as a method for artemether identification and quantification.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Marx Osorio Araujo Pereira, Alvaro Ferreira Junior, Edson Silvio Batista Rodrigues, Helena Mulser, Giovanna Nascimento de Mello e Silva, Wallans Torres Pio dos Santos, Eric de Souza Gil
Summary: Brazilian spotted fever (BSF) is a serious and rapidly evolving disease. A new impedimetric immunosensor was developed for rapid diagnosis by measuring specific antibodies in plasma. The sensor demonstrated selectivity and accuracy, and has potential for important applications in diagnostic testing.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Kathrin Schilling, Ronald A. Glabonjat, Olgica Balac, Marta Galvez-Fernandez, Arce Domingo-Relloso, Vesna Slavkovich, Jeff Goldsmith, Miranda R. Jones, Tiffany R. Sanchez, Ana Navas-Acien
Summary: Analysis of trace elements in urine is an important tool for assessing exposures, diagnosing nutritional status, and guiding public health and healthcare intervention. This study provides a sensitive method for analyzing 18 elements in urine samples, using only 100 μL. The results show good accuracy and sensitivity of the method.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Mengya Li, Shijie Liu, Shiliang Guo, Dong Liang, Miaoyun Li, Yaodi Zhu, Lijun Zhao, Jong-Hoon Lee, Gaiming Zhao, Yangyang Ma, Yanxia Liu
Summary: In this study, a magnetic flow device was developed to purify spores in a culture medium system. The device used magnetic nanoparticles to absorb vegetative cells, separating them from the spores. The achieved purity of the collected spores was over 95%. The study also demonstrated a rapid quantitative detection method using Raman spectroscopy.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Wanqiong Liu, Zixuan Wu, Jianwei Peng, Zebin Xu, Yong Liang
Summary: Metal-organic frameworks (MOFs) are effective carriers for molecular imprinting, but their poor dispersibility in aqueous solution is a significant drawback. In this study, we have applied amphiphilic block copolymers and molecularly imprinted technology on MOFs to improve the hydrophilicity of molecularly imprinted fluorescent materials.
ANALYTICAL METHODS
(2024)
