Article
Engineering, Environmental
N. R. H. Rao, K. L. Linge, X. Li, C. A. Joll, S. J. Khan, R. K. Henderson
Summary: This study aimed to characterize the dissolved organic nitrogen (DON) pool derived from algae, particularly proteinaceous DON, to explore the relationship between the characteristics of algal-derived proteins and the formation potential of nitrogenous disinfection by-products (N-DBPs). The results showed that 77-96% of the total DON in all samples came from proteins. Various analytical techniques were used to analyze the samples and common aliphatic and heterocyclic N-groups were identified, as well as species-dependent variability. It is suggested to use multiple analytical techniques to assess the formation potential of N-DBPs in algae-laden waters.
Article
Physics, Multidisciplinary
Ainitze Biteri-Uribarren, Pol Alsina-Bolivar, Carlos Munuera-Javaloy, Ricardo Puebla, Jorge Casanova
Summary: This study tackles the detection of individual molecules by combining a hybrid sensor-a nitrogen vacancy center (NV) and a dangling bond on the diamond surface-with a multi-tone dynamical decoupling sequence. Via numerical simulations, the authors prove that the sequence minimizes the impact of decoherence, which allows using the dangling-bond as a signal amplifier.
COMMUNICATIONS PHYSICS
(2023)
Article
Polymer Science
Marin Bozicevic, Lucija Fiket, Magdalena Vujasinovic, Roko Blazic, Marin Kovacic, Zvonimir Katancic
Summary: One of the most widely used conductive polymers in the industry is PEDOT, which has good thermal and chemical stability, a conjugated backbone, and ease of functionalization. However, its lack of stretchable and self-healing properties limits its use in wearable electronics. To overcome this, PEDOT was grafted with flexible side branches using a bromine-functionalized thiophene derivative. The reactivity of different monomer ratios and the effect of reaction time on the final properties of the polymer were investigated.
Article
Chemistry, Applied
Clement Kehinde Ajani, Zhiwei Zhu, Da-Wen Sun
Summary: Dynamic investigation on the effects of vacuum cooling on cellular water transport and structural changes of steamed bread was conducted using NMR/MRI technique. The study revealed that vacuum cooling caused water loss and structural changes in steamed bread, and the initial condition of the food also influenced the vacuum cooling process.
Article
Physics, Multidisciplinary
Wentian Zheng, Ke Bian, Xiakun Chen, Yang Shen, Shichen Zhang, Rainer Stohr, Andrej Denisenko, Jorg Wrachtrup, Sen Yang, Ying Jiang
Summary: An efficient method was developed to engineer the electrostatic environment of near-surface nitrogen vacancy center qubits, increasing their coherence and sensitivity.
Article
Chemistry, Physical
Lukasz Pajchel, Leszek Borkowski
Summary: Fluoride-substituted apatites and hydroxyapatite were synthesized using the sol-gel method and calcined at different temperatures, revealing that the fluoride-substituted apatites were thermally stable but contained OH- groups. Characterization methods showed that the obtained materials had crystals with a shape similar to that of biological apatite.
Article
Quantum Science & Technology
Johannes Jakob Meyer, Johannes Borregaard, Jens Eisert
Summary: This research demonstrates the feasibility of variational quantum algorithms on noisy and intermediate-scale quantum devices to address the core challenge of multi-parameter estimation problems. A general framework is introduced and practical functionality is shown through numerical simulations. By utilizing quantum technology, more optimal quantum metrology protocols have been developed.
NPJ QUANTUM INFORMATION
(2021)
Article
Materials Science, Multidisciplinary
Hyang Keun Yoo, Luca Moreschini, Aaron Bostwick, Andrew L. Walter, Tae Won Noh, Eli Rotenberg, Young Jun Chang
Summary: This research used in situ angle-resolved photoemission spectroscopy to elucidate the mechanisms for the formation of the high-mobility conducting interface (CI) between LaAlO3 (LAO) and SrTiO3 (STO); The study shows that the built-in potential (V-bi) and oxygen gas (O-2(g)) exposure have an effect on CI formation, and UV irradiation can alter V-bi.
CURRENT APPLIED PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Qian Zhang, Xuwen Qin, Hong Zhang, Yanhui Dong, Cheng Lu, Shouding Li, Luokun Xiao, Chao Ma, Hang Bian
Summary: In this study, the process of hydrate formation and dissociation in sediments from the South China Sea was systematically studied to examine the evolution of hydrate saturation and permeability in sediments and their relationship. The results showed that the existing models considering a single pattern of hydrate growth cannot precisely describe the relationship between permeability and hydrate saturation.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Quantum Science & Technology
Paul C. Jerger, Yu-Xin Wang, Mykyta Onizhuk, Benjamin S. Soloway, Michael T. Solomon, Christopher Egerstrom, F. Joseph Heremans, Giulia Galli, Aashish A. Clerk, David D. Awschalom
Summary: Single-qubit sensing protocols can measure qubit-bath coupling parameters. However, the sensing protocol itself can perturb the bath, causing a quantum quench effect. This study observed the bath perturbation in a nitrogen-vacancy (NV) center by measuring the phase-resolved spin-echo of the nuclear spin bath. The relationship between the sensor phase and the Gaussian spin-bath polarization was derived to optimize the transfer efficiency of the dynamic nuclear polarization sequence.
Article
Thermodynamics
Andrius Gineika, Kestutis Baltakys
Summary: The influence of temperature and duration on the formation of cuspidine during hydrothermal synthesis was investigated in two different systems. Cuspidine was found to form at 130 degrees C within 12 h in the CaO-SiO2 center dot nH(2)O system, and at higher temperatures (150-200 degrees C) its formation started earlier (within 4 h). Synthetic cuspidine samples from both systems exhibited a scaffold-like structure. The mineralogical composition of the synthesized products remained stable up to 48 h.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Geochemistry & Geophysics
I Criouet, J-C Viennet, P. Jacquemot, M. Jaber, S. Bernard
Summary: The ancient fossil record provides crucial information on the diversity and disparity of ancient life, but decoding it can be challenging due to geological history. This study demonstrates that abiotic organic cell-like microstructures meeting biogenicity criteria can form under classical diagenesis conditions.
GEOCHEMICAL PERSPECTIVES LETTERS
(2021)
Article
Geochemistry & Geophysics
J. C. Viennet, C. Le Guillou, L. Remusat, F. Baron, L. Delbes, A. M. Blanchenet, B. Laurent, I. Criouet, S. Bernard
Summary: The study revealed differences in polymerization reactions of organic materials in the presence or absence of Fe-rich smectitic minerals under simulated asteroid conditions, and the influence of organic materials on the crystallization of minerals. These findings contribute to a better understanding of the interactions between organic materials and minerals in carbonaceous chondrites.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Energy & Fuels
Kouqi Liu, Thomas Gentzis, Humberto Carvajal-Ortiz, Zonghai Harry Xie, Mehdi Ostadhassan
Summary: This study analyzed 17 shale samples with different maturities from the Bakken Formation in the United States using the 2D NMR T-1-T-2 map method. The results showed that the organic matter in these samples belongs to kerogen type II and is in the immature to early oil generation window stages. The study focused on the T-1 relaxation time distribution in region 2 and proposed new parameters T-1p and T-2p to assess the physicochemical properties of the OM.
Article
Spectroscopy
Mahwish Bashir, Farzana Majid, Ismat Bibi, Zunaira Jamil, Adnan Ali, Nawal Al-Hoshani, Rania Ali El Hadi Mohamed, Munawar Iqbal, Arif Nazir
Summary: The objective of this work was to evaluate the in vitro diagnosis of calcium oxalate kidney stones using a solution made from a mixture of Bryophyllum pinnatum powder, apple cider vinegar, and lemon juice. Two surgically removed stones were dipped in this solution and the results showed that the kidney stone completely dissolved in the lemon juice solution, while a considerable weight reduction was observed in the apple cider vinegar solution. Fourier transform infrared spectroscopy and Raman spectroscopy confirmed the dissolution process. Scanning electron microscopy images revealed cluster formation and aggregation of particles. This in vitro study proves that a mixture of Bryophyllum pinnatum powder and lemon juice is an effective remedy for removing kidney stones.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Inorganic & Nuclear
R. Lee Ayscue, Chloe P. Verwiel, Jeffery A. Bertke, Karah E. Knope
INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Inorganic & Nuclear
Aphra Murray, Nicole A. Vanagas, Jennifer N. Wacker, Jeffery A. Bertke, Karah E. Knope
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Aphra Murray, Jennifer N. Wacker, Jeffery A. Bertke, Karah E. Knope
Summary: This study systematically examined the influence of aliphatic dicarboxylates on actinide structural chemistry, highlighting the role of organic ligands in stabilizing unique tetravalent actinide structural units.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Inorganic & Nuclear
Jennifer N. Wacker, Aaron D. Nicholas, Monica Vasiliu, Alexander C. Marwitz, Jeffery A. Bertke, David A. Dixon, Karah E. Knope
Summary: Five novel tetravalent thorium compounds were isolated from acidic aqueous solutions, providing a series of monomeric Th-IV complexes for studying the effects of noncovalent interactions. The relative energies separating the complexes in the series were understood through theory and electronic structure calculations, highlighting the energetic driving force for chloride complexation. The role of counterions in stabilizing these complexes was investigated using electrostatic potential surfaces, showing the directing effects of noncovalent interactions on Th speciation.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
R. Lee I. I. I. I. I. I. Ayscue, Valerie Vallet, Jeffery A. Bertke, Florent Real, Karah E. Knope
Summary: This study reports on the preparation of seven novel bismuth(III)-halide phases under mild synthetic conditions, each showing unique photoluminescent properties that can be tuned by controlling composition. The heterometallic phases exhibit rare visible excitation pathways based on halide-metal to ligand charge transfer, providing fundamental insight into the structure-property relationships within these Bi halide organic hybrid materials.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Jennifer N. Wacker, Alexander S. Ditter, Samantha K. Cary, Aphra Murray, Jeffery A. Bertke, Gerald T. Seidler, Stosh A. Kozimor, Karah E. Knope
Summary: A cerium-oxo nanocluster capped by chloride ligands has been isolated from acidic chloride solutions using potassium counterions. The cluster features a {Ce-14} core surrounded by tetranuclear {Ce-4} subunits to yield the {Ce-38} cluster. The surface of the cluster is capped by chloride ligands and water molecules, with charge balanced by potassium counterions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexander C. Marwitz, Aaron D. Nicholas, Leticia M. Breuer, Jeffery A. Bertke, Karah E. Knope
Summary: A new bismuth(III)-organic compound was synthesized, displaying long-lived bright-blue-green phosphorescence in the solid state. This compound is the first to exhibit such long-lived phenanthrolinium phosphorescence at room temperature. Studies on the excitation pathway and energy transfer mechanism, as well as successful ion doping, allowed for tunability of the emission color.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Anamar Blanes-Diaz, Orlando Stewart, Monica Vasiliu, Aaron Nicholas, Aphra Murray, Madeline C. Shore, David A. Dixon, Karah E. Knope
Summary: The synthesis and structural chemistry of two tetravalent thorium compounds precipitated from acidic bromide solutions are discussed in this article. Both compounds exhibit Th-Br coordination, with one previously reported and the other a newly discovered compound. The addition of four bromide ions shows a thermodynamic driving force for Th-Br complexation. The role of organic cations in the isolation of the compounds is also explored.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Inorganic & Nuclear
Orlando C. Stewart, Alexander C. Marwitz, Joel Swanson, Jeffery A. Bertke, Tyler Hartman, Jorge H. S. K. Monteiro, Ana de Bettencourt-Dias, Karah E. Knope, Sarah L. Stoll
Summary: The luminescence properties of two divalent europium complexes and one trivalent europium complex were investigated, revealing temperature-dependent emission behaviors. Additionally, a series of trivalent lanthanide complexes were synthesized and characterized, demonstrating room temperature luminescence.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Alexander C. Marwitz, Anuj K. Dutta, Morgan A. McDonald, Karah E. Knope
Summary: A new bismuth-organic compound with phen and PDC was synthesized and characterized. The compound exhibited a 2-D structure with PDC bridging metal centers through three unique bonding modes. The compound also showed strong hydrogen-bonding interactions and yellow photoluminescence. Doping studies with Eu3+ resulted in characteristic Eu3+ emission and high quantum yields.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Inorganic & Nuclear
Bo Li, Zachary R. Jones, Cecilia Eiroa-Lledo, Karah E. Knope, Veronika Mocko, Benjamin W. Stein, Jennifer N. Wacker, Stosh A. Kozimor, Enrique R. Batista, Ping Yang
Summary: In order to understand the behavior of lanthanide/actinide ions in solvent salts, molecular dynamics simulations and EXAFS measurements were performed. It was found that the increase in solvent salt polarity led to an increase in the coordination number of ions. This coordination change was validated by the EXAFS measurements. The rigidity of the coordination shell was found to be related to the diffusivity of the ions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Anamar Blanes-Diaz, Mohammad Shohel, Natalie T. Rice, Ida Piedmonte, Morgan A. McDonald, Kaveh Jorabchi, Stosh A. Kozimor, Jeffery A. Bertke, May Nyman, Karah E. Knope
Summary: Cerium-oxo clusters supported by acetylacetonate have been synthesized and structurally characterized in this study. The results show that these clusters can support diverse configurations in organic solutions, potentially stabilizing higher order cerium-containing clusters.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Alexander C. Marwitz, Aaron D. Nicholas, Rajani Thapa Magar, Anuj K. Dutta, Joel Swanson, Tyler Hartman, Jeffery A. Bertke, Jeffrey J. Rack, Luiz G. Jacobsohn, Karah E. Knope
Summary: Five bismuth(iii)-organic phases consisting of supramolecular assemblies of Bi-2,6-pyridinedicarboxylate and substituted phenanthroline molecules were synthesized. These compounds exhibited solid-state photoluminescence, with phosphorescence originating from the substituted phenanthroline units and fluorescence arising from the coordinated pyridinedicarboxylate ligands. Bismuth induced spin-orbit coupling, resulting in phosphorescence, and acted as a heavy metal attenuator for X-ray luminescence. Computational findings suggested favorable conditions for triplet energy transfer from donor Bi(iii)-organic units to acceptor phenanthroline derivatives. This study provides valuable insights into the structure-property relationships of luminescent bismuth-organic compounds and highlights the role of noncovalent interactions in achieving room temperature phosphorescence and radioluminescence.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Alyssa K. Adcock, Alexander C. Marwitz, Lulio A. Sanz, R. Lee Ayscue, Jeffery A. Bertke, Karah E. Knope
Summary: Four heteroleptic bismuth-organic phases were synthesized at room temperature, including different halide substitutions, as well as europium-doped phases. Significant pi-pi stacking and halide-pi interactions were observed in the solid-state structures of these phases. Photophysical measurements were carried out to determine the quantum yield and lifetime values of the visible-light emitters.
Article
Chemistry, Multidisciplinary
Zachary R. Jones, Maksim Y. Livshits, Frankie D. White, Elodie Dalodiere, Maryline G. Ferrier, Laura M. Lilley, Karah E. Knope, Stosh A. Kozimor, Veronika Mocko, Brian L. Scott, Benjamin W. Stein, Jennifer N. Wacker, David H. Woen
Summary: The study characterized the speciation of Ac3+ and Cm3+ in different acetic acid/acetate concentrations, and identified that increasing concentrations of acetic acid/acetate led to increased acetate complexation. This was supported by characterizing (NH4)2M(O2CMe)5 (M = Eu3+, Am3+ and Cm3+) using single crystal X-ray diffraction and optical spectroscopy.
