Article
Chemistry, Physical
Stephan Werner, Peter Guttmann, Frank Siewert, Andrey Sokolov, Matthias Mast, Qiushi Huang, Yufei Feng, Tongzhou Li, Friedmar Senf, Rolf Follath, Zhohngquan Liao, Kristina Kutukova, Jian Zhang, Xinliang Feng, Zhan-Shan Wang, Ehrenfried Zschech, Gerd Schneider
Summary: The combination of near edge X-ray absorption spectroscopy with nanoscale X-ray imaging is a powerful analytical tool that can be applied in various fields such as energy technologies, catalysis, microelectronics, and life science. By designing a novel monochromator setup, the photon flux in the tender X-ray regime can be greatly improved, enabling previously unattainable laboratory and synchrotron-based studies.
Review
Chemistry, Physical
J. Pellicer-Porres, A. Segura, Ch Ferrer-Roca, J. Gonzalez, V Munoz-Sanjose
Summary: In this work, the local structure of layered Ga1-xInxSe alloys was studied using X-ray Absorption and Raman spectroscopy. The presence of Ga - In bonds in the alloys was demonstrated, with similar cation-anion bond lengths to those of pure compounds and no significant increase in static disorder. The Raman spectra showed similar features to pure compounds, but with continuous peak shifting as impurity cations were introduced.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yao-Jen Tu, Shan-Li Wang, Ying-Rui Lu, Ting-Shan Chan, Cliff T. Johnston
Summary: This study synthesized six kinds of magnetic nanoferrites to investigate their ability in removing Sb(III) and Sb(V) from aquatic systems. The results showed that ZnFe2O4 had great potential to adsorb and oxidize Sb(III) in aqueous solutions, providing essential information for designing a rapid and effective Sb removal technique.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Multidisciplinary Sciences
Jorg Schaller, Bei Wu, Wulf Amelung, Zhengyi Hu, Mathias Stein, Eva Lehndorff, Martin Obst
Summary: Rice cultivation requires high amounts of phosphorus (P), however, significant amounts of P may be retained by iron (Fe) oxides and become unavailable for plants. Additionally, rice cultivation has a high demand for silicic acid (Si), reducing the availability of Si after a short period of cultivation. A study of a 2000-year-old paddy chronosequence showed that Si limitation, observed after a few decades of rice cultivation, is limiting the availability of P. This is believed to be due to Si-induced changes in the speciation of Fe-phases in soil particles and competition between Si and P for binding sites. Proper management of Si availability could be a promising tool for improving P supply in paddy soils.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Bura Sindhupakorn, Pinit Kidkhunthod
Summary: This study examined structural changes in subchondral bone samples from osteoarthritic knee patients compared to controlled patients, using Synchrotron-based X-ray fluorescence and X-ray absorption spectroscopy techniques. The results revealed lower phosphorus content in older OA patients, leading to lower Ca-P proportions associated with osteoporosis. The majority of bone samples exhibited an amorphous structure of calcium-phosphate.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Environmental Sciences
Nicole A. DiBlasi, Agost G. Tasi, Xavier Gaona, David Fellhauer, Kathy Dardenne, Joerg Rothe, Donald T. Reed, Amy E. Hixon, Marcus Altmaier
Summary: The impact of calcium on the Pu(IV)-EDTA system was investigated, revealing the formation of a quaternary complex CaPu(OH)4(EDTA)2- in the presence of calcium, significantly enhancing plutonium solubility.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Nanoscience & Nanotechnology
Lars Ostervold, Adam Smerigan, Matthew J. Liu, Leah R. Filardi, Fernando D. Vila, Jorge E. Perez-Aguilar, Jiyun Hong, William A. Tarpeh, Adam S. Hoffman, Lauren F. Greenlee, Ezra Lee Clark, Michael J. Janik, Simon R. Bare
Summary: This study shows that electrolyte cations can have a direct impact on the performance of oxide electrocatalysts by incorporating into their lattice. By investigating the transformation of copper electrodes in alkaline electrolytes, it is found that in Ba(OH)2 electrolytes, ordered BaCuO2 phase is formed and further oxidized to a Cu3+-like Ba- x Cu- y O (z) phase. Moreover, Cu-O bonds and Cu-Ba scattering persist even during reduction. This is the first evidence of direct oxidative incorporation of an electrolyte cation into the bulk lattice to form a mixed oxide electrode. The results suggest a new route for the in situ formation of active and selective oxidation electrocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Galina M. Kuz'micheva, Liudmila I. Ivleva, Irina A. Kaurova, Evgeny Khramov, Victor B. Rybakov, Maxim E. Doroshenko
Summary: Calcium orthovanadate single crystals doped with manganese were studied, revealing Mn3+ ions and vacancies at different sites; proposed models for the rearrangement of polyhedra; observed different oxidation states of manganese ions through optical spectroscopy.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Thanit Saisopa, Aritsa Bunpheng, Tirapat Wechprasit, Pinit Kidkhunthod, Prayoon Songsiriritthigul, Arreerat Jiamprasertboon, Atipong Bootchanont, Wutthigrai Sailuam, Yuttakarn Rattanachai, Chakrit Nualchimplee, Wisit Hirunpinyopas, Pawin Iamprasertkun
Summary: Transition metal dichalcogenides (TMDs) are candidate materials for various electrochemical applications. Tungsten selenide (WSe2) with different flake sizes was produced through traditional liquid phase exfoliation, and a finely-selected flake size was used for structural and electrocatalytic characterization. The study found that the electronic structure of WSe2 changes with the increase of flake dimension, which directly affects its catalytic performance in hydrogen evolution reaction.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Engineering, Environmental
Yuqin Sun, Jing Sun, Athena A. Nghiem, Benjamin C. Bostick, Tyler Ellis, Long Han, Zengyi Li, Songlin Liu, Shuangbao Han, Miao Zhang, Yu Xia, Yan Zheng
Summary: The study used high-resolution spectroscopy techniques in combination with groundwater composition and metagenomics measurements to investigate the oxidation states of arsenic and iron in sediments from the Yinchuan Plain in northwest China. Results showed that at shallower depths, sediments contained high levels of As(V), As(III), and Fe(III) (hydr)oxides, while at deeper depths, sediments were enriched in As(V), As(III), and Fe(III) (hydr)oxides, despite high As(III) concentrations in groundwater. The study supports active arsenic and iron reduction processes based on the contrast between the dominant forms of arsenic in groundwater and sediment, as well as the decreasing concentrations of sediment As(V) and Fe(III) (hydr)oxides with depth.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fatima Sajid, Naila Jabeen, Latif U. Khan, Manzar Sohail, Adeela Rehman, Zareen Akhter
Summary: The increased emission of volatile organic compounds (VOCs) and their adverse effects on the environment have led to the development of more economical and sustainable sensing technologies. Ethanol, a member of the VOC family, has harmful effects on human health and the environment. Therefore, there is a high demand for an efficient electrocatalyst for ethanol detection at ambient temperature. In this study, NiO-based sensing material was successfully synthesized by modifying NiO through transition metals doping (8% Cu and 8% Zn) and codoping (4% Cu + 4% Zn). The synthesized catalysts were characterized by various techniques, and it was found that the codoped NiO exhibited better catalytic performance for ethanol detection with a wide linear range and a low detection limit.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Optics
Oliver Townsend, Silvia Gazzola, Sergey Dolgov, Paul Quinn
Summary: Combinations of spectroscopic analysis and microscopic techniques are used across many disciplines of scientific research. X-ray spectromicroscopy is a powerful tool for studying chemical state distributions at the micro and nano scales. This work proposes a novel approach for reducing the dose and scanning times by undersampling the raster data.
Article
Chemistry, Physical
D. N. Gorbunov, M. V. Nenasheva, I. A. Baravoia, A. A. Guda, V. G. Vlasenkoc, A. L. Trigub, V. V. Shapovalov, A. D. Zagrebaev, B. O. Protsenko, A. V. Soldatov, E. R. Naranov, A. L. Maximov
Summary: In this work, the authors studied the reductive hydroformylation process over Rh/NR3 catalysts by analyzing its two main stages separately and evaluating the role of amine structures. They also used in situ XAS method to investigate the catalytic system and observe the correlation between the obtained structural information and the catalytic results. The study showed that tertiary amines can suppress Rh clusterization and form species of lower nuclearity, and the addition of amines can accelerate the hydrogenation step but decelerate the hydroformylation process, possibly through the formation of amine-containing Rh complexes.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Analytical
Lifo Ruan, Haijing Li, Jiayu Zhang, Mengxue Zhou, Hui Huang, Juncai Dong, Jinxia Li, Feng Zhao, Zhonghua Wu, Jun Chen, Zhifang Chai, Yi Hu
Summary: Iron oxide nanoparticles (IONPs) are widely used in biomedical research, but their subcellular transformation and biological effects are not well understood. In this study, we prepared three types of IONPs, including those targeting mitochondria (IONP-TPP) and lysosomes (IONP-APM), and a control group with no specific target (IONP). Results showed that mitochondria-targeted IONP-TPP induced significant cytotoxicity and mitochondrial membrane depolarization in MCF-7 cells. X-ray absorption spectroscopy (XAS) analysis revealed remarkable edge defects and oxidation of IONP-TPP inside the cell. These findings highlight the potential chemical transformation of IONPs at mitochondria and the vulnerability of mitochondria to IONP accumulation.
Article
Materials Science, Multidisciplinary
Seiya Shimono, Masataka Sekine, Yasuhiro Niwa, Hajime Sagayama, Koji Araki, Yoshiaki Hata, Hiroaki Kishimura
Summary: Novel organic-inorganic hybrid materials, including [MeIM]2[MnBr4] and [EtIM]2[MnBr4], were synthesized using a solid-state reaction method and characterized by various techniques. These compounds exhibited narrow green emission bands due to the electronic transitions of the Mn2+ ion, with [EtIM]2[MnBr4] showing a quantum efficiency of 74.5%. The luminescence properties of the materials were influenced by the solid-to-liquid phase transitions and the presence of [MeIM]+ and [EtIM]+ cations, as indicated by X-ray absorption fine structure spectra, differential scanning calorimetry curves, and temperature dependences of the photoluminescence spectra.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Geosciences, Multidisciplinary
Alessandra C. Leri, Lawrence M. Mayer, Kathleen R. Thornton, Paul A. Northrup, Marisa R. Dunigan, Katherine J. Ness, Austin B. Gellis
Article
Biotechnology & Applied Microbiology
Mark J. Krzmarzick, Benjamin B. Crary, Jevon J. Harding, Oyenike O. Oyerinde, Alessandra C. Leri, Satish C. B. Myneni, Paige J. Novak
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2012)
Article
Environmental Sciences
Alessandra C. Leri, Laura N. Anthony
Article
Geochemistry & Geophysics
Alessandra C. Leri, Satish C. B. Myneni
GEOCHIMICA ET COSMOCHIMICA ACTA
(2012)
Article
Geochemistry & Geophysics
Alessandra C. Leri, Lawrence M. Mayer, Kathleen R. Thornton, Bruce Ravel
GEOCHIMICA ET COSMOCHIMICA ACTA
(2014)
Article
Environmental Sciences
Alessandra C. Leri, J. Alexandra Hakala, Matthew A. Marcus, Antonio Lanzirotti, Christopher M. Reddy, Satish C. B. Myneni
GLOBAL BIOGEOCHEMICAL CYCLES
(2010)
Article
Environmental Sciences
Alessandra C. Leri, Satish C. B. Myneni
GLOBAL BIOGEOCHEMICAL CYCLES
(2010)
Article
Multidisciplinary Sciences
Andrew Barber, Jay Brandes, Alessandra Leri, Karine Lalonde, Kathryn Balind, Sue Wirick, Jian Wang, Yves Gelinas
SCIENTIFIC REPORTS
(2017)
Article
Instruments & Instrumentation
Alessandra C. Leri, Bruce Ravel
JOURNAL OF SYNCHROTRON RADIATION
(2014)
Article
Chemistry, Applied
Alessandra C. Leri, Marisa R. Dunigan, Rosie L. Wenrich, Bruce Ravel
Article
Biochemistry & Molecular Biology
Alessandra C. Leri
Summary: Undergraduates majoring in Biology and Biomedical Sciences at our small liberal arts college are required to participate in a seminar during their senior year, focusing on different topics in molecular biology and biochemistry. Amid the COVID-19 pandemic in March 2020, the seminar transitioned to an online Zoom platform with a revised focus on emerging research about the novel coronavirus, providing a seamless continuation and rich exploration of diverse topics in molecular biology and genetics.
BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION
(2021)
Article
Chemistry, Multidisciplinary
Alessandra C. Leri, Ashley P. Pavia
Summary: This experiment introduces undergraduate organic chemistry students to the analysis and interpretation of FTIR spectra by characterizing postconsumer plastics. Students learn to identify and differentiate recyclable polymer resins using FTIR spectra, and they also investigate a self-sourced plastic container to identify the resins in its various components. The experiment has practical implications for plastic resin sorting in recycling facilities.
JOURNAL OF CHEMICAL EDUCATION
(2022)
Article
Construction & Building Technology
Alessandra C. Leri, Marjan Khan
Summary: Despite the abundance of faecal pathogens in urban environments, the presence of faecal bacteria on city streets has not been quantified. The transfer of faecal pathogens between outdoor and indoor environments is also not well understood. This study found that faecal indicator bacteria were present on interior floor surfaces, shoe soles of building occupants, and exterior sidewalks in New York City. The findings suggest that there is ample opportunity for human exposure to faecal pathogens in the indoor environment.
INDOOR AND BUILT ENVIRONMENT
(2023)
Article
Oceanography
Rose Jones, Sarah Nicholas, Paul Northrup, Benjamin C. Bostick, Colleen Hoffman, Wen Hu, Phoebe J. Lam, Alessandra Leri, Brandy M. Toner, Benjamin S. Twining
Summary: Synchrotron instruments are valuable tools for marine studies, allowing nondestructive measurements of chemical composition and speciation on small sample volumes and at low concentrations. This article provides guidance for new users on accessing these instruments, designing appropriate experiments, and avoiding common pitfalls. Successful marine studies using synchrotron techniques are also presented.
