Article
Materials Science, Ceramics
N. A. Zhuk, M. G. Krzhizhanovskaya
Summary: The thermal behavior of pyrochlores composed of Bi1.5Mg0.75M1.5O6.75 (M = Nb, Ta) was studied using high-temperature X-ray powder diffraction. Both compounds undergo thermal dissociation at temperatures above 1080 degrees C. The thermal expansion analysis showed that the materials studied belong to slightly or moderately expanding materials, with isotropic expansion.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Shaohui Qiu, Liyang Ma, Shi Liu, Huaxiang Fu
Summary: Through density functional calculations, it was found that LiNbO3 exhibits hyperferroelectric properties under certain conditions, with a soft phonon capable of inducing hyperferroelectricity due to its extraordinarily small mode effective charge. However, the ground state of LiNbO3 under OCBC is still non-polar, suggesting that the presence of soft phonons does not guarantee hyperferroelectricity. Additionally, LiNbO3 under OCBC may display unusual tristable polarization states, indicating rich and interesting hyperferroelectric physics in this material.
Article
Chemistry, Physical
Mariia S. Koroleva, Aleksei G. Krasnov, Irina Piir
Summary: New Ru-doped bismuth-based pyrochlores were synthesized and their crystal structure, stability, optical, and electrical properties were studied. Ru doping led to a decrease in lattice parameters and a decrease in band gap energy. The chemical compatibility of the pyrochlores with La0.7-Sr0.3MnO3 was investigated. The pyrochlores showed potential as cathode composite materials for intermediate temperature solid oxide fuel cells (IT-SOFC).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yang Bai, Andrey A. Kistanov, Wei Cao, Jari Juuti
Summary: This study introduces an alternative method to simultaneously tune the band gap and ferroelectricity by intentionally introducing A-site vacancies to induce self-assembly of niobate perovskite and niobate tungsten bronze phases, forming a composite. The interface between the two phases, acting like a heterojunction, is responsible for the resulting narrow band gap and strong ferroelectricity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
K. Geirhos, J. Langmann, L. Prodan, A. A. Tsirlin, A. Missiul, G. Eickerling, A. Jesche, V Tsurkan, P. Lunkenheimer, W. Scherer, I Kczsmarki
Summary: We report the observation of an antipolar phase in cubic GaNb4S8 driven by an unconventional microscopic mechanism, the cooperative Jahn-Teller effect of Nb4S4 molecular clusters. The study suggests sudden changes in crystal structure and a significant drop in dielectric constant at T-JT = 31 K, indicating a first-order transition, as well as the presence of dynamic Jahn-Teller effect in the cubic phase above T-JT. Additionally, the possibility of GaNb4S8 transforming into a ferroelectric state, based on various structural polymorphs reported in lacunar spinels, including ferroelectric phases, further classifies the observed antipolar phase as antiferroelectric.
PHYSICAL REVIEW LETTERS
(2021)
Article
Crystallography
Xianghan Xu, Choongjae Won, Sang-Wook Cheong
Summary: Using a laser floating zone technique, the successful growth of a DyInO3 crystal with Dy3+-based triangular layers is reported for the first time. Fine-tuning of the Indium stoichiometry was found to be crucial for stabilizing the desired hexagonal phase. The crystal structure analysis reveals a non-centrosymmetric space group and the experimental results show switchable polarization, indicating ferroelectricity, and ferroelectric domain configuration at room temperature. Anisotropic magnetic and thermodynamic measurements suggest the presence of antiferromagnetic interactions and a strongly frustrated magnetism.
Article
Materials Science, Multidisciplinary
Kinnary Patel, Sergey Prosandeev, Bin Xu, Changsong Xu, L. Bellaiche
Summary: First-principles calculations were used to study the properties of (001) thin films made of the complex perovskite system, NaNbO3, under epitaxial strain. The study revealed the existence of three different ground states for different strain regimes, with ferroelectric, antiferroelectric, and antiferrodistortive properties discussed as a function of misfit strain.
Article
Materials Science, Multidisciplinary
Sheetal, C. S. Yadav
Summary: This article investigates a series of disordered pyrochlore oxides and compares their crystal structure, magnetic, and heat capacity behavior with that of Dy2Zr2O7 and Ho2Zr2O7 systems. The study reveals that these oxides exhibit similar magnetic and heat capacity behavior to the Dy2Zr2O7 and Ho2Zr2O7 systems. Additionally, it is found that the spin-freezing behavior can be induced by slowing down the spin dynamics with a suitable choice of the magnetic field.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Physics, Condensed Matter
Xing-Liang Xu, Dong-Dong Meng, Xu-Guang Zheng, Qi-Xin Guo
Summary: The investigation reveals that the temperature-dependent ordering of hydrogen/deuterium atoms in geometrically frustrated magnets Co-2(OH)(3)Br and Co-2(OD)(3)Br leads to the emergence of ferroelectricity. Raman spectroscopy shows significant changes in Raman frequencies and line-widths of Raman-active modes, indicating strong spin-phonon couplings in the system.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Owen Bailey, Samra Husremovic, Madison Murphy, Jason Ross, Joyce Gong, Daniel Olds, Geneva Laurita
Summary: Most pyrochlore oxide materials cannot transition from paraelectric to ferroelectric phase due to the triangular arrangement of cations on the pyrochlore lattice. However, some pyrochlore materials doped with rare earth cations can overcome this constraint and exhibit polar crystal structures. Our study found that most samples showed local distortions similar to the beta-cristobalite structure. Additionally, factors such as cation size, bond valence, electronic structure, and magnetoelectric interactions play a complex role in the structural behavior.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Q. M. Liu, D. Wu, Z. A. Li, L. Y. Shi, Z. X. Wang, S. J. Zhang, T. Lin, T. C. Hu, H. F. Tian, J. Q. Li, T. Dong, N. L. Wang
Summary: Researchers have discovered a unique photoinduced multistage phase transition process in Ta2NiSe5, including a short-lived state and a stable new state, with the latter exhibiting a drastic drop in resistivity by more than four orders of magnitude at 50K with a distinct lattice structure. Additionally, nano-sheet samples with a thickness less than the optical penetration depth are required for achieving complete transition.
NATURE COMMUNICATIONS
(2021)
Review
Chemistry, Multidisciplinary
Pralay Gayen, Sulay Saha, Vijay Ramani
Summary: This article discusses the importance of low-cost electrocatalysts in fuel cells, water electrolyzers, unitized regenerative fuel cells, and metal-air batteries by studying the structure-activity relationship of pyrochlore oxides. Pyrochlore oxides have the ability to tune their structure and electronic properties, resulting in excellent bifunctional oxygen electrocatalytic activity and high OER selectivity for a wide range of applications. The article also discusses the recent developments and applications of pyrochlore-based electrocatalysts.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Inorganic & Nuclear
Rosa Muller, Olivia Georghiades, Joshua D. Bocarsly, Farheen N. Sayed, Victor Riesgo-Gonzalez, Andrew D. Bond, Clare P. Grey, Dominic S. Wright
Summary: This study investigates the potential of lanthanide-containing polyoxotitanates as single-source precursors for hybrid oxides. The properties of the compounds were characterized using magnetic measurements, and their stability at high temperatures was observed.
DALTON TRANSACTIONS
(2023)
Review
Chemistry, Physical
Mikhail Talanov, Valeriy M. Talanov
Summary: In this study, a comprehensive classification of ordered pyrochlores was established through group-theoretical and crystallographic analysis, revealing the intrinsic relationships and fundamental structural features of the material. The study also discussed the application directions of theoretical results, including interpretation of phase transition origins, experimental property predictions, and materials design.
CHEMISTRY OF MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Monica J. Garcia-Rodriguez, Oswaldo Sanchez-Dena, Omar A. Velasco-Cortez, Cesar L. Ordonez-Romero, Milton O. Vazquez-Lepe, Christian Jonin, Rurik Farias, Pierre-Francois Brevet, Jorge-Alejandro Reyes-Esqueda
Summary: Random granular media can exhibit characteristics related to ordered media, as observed in the polarized Second Harmonic Generation (SHG) response from reduced iron-doped lithium niobate (LN:Fe) powders due to multiple scattering. The SHG response can be controlled by magnetic induction. The study also reveals the importance of a reducing atmosphere for modifying the SHG response of LN:Fe powders.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Gastroenterology & Hepatology
Kelli L. VanDussen, Aleksandar Stojmirovic, Katherine Li, Ta-Chiang Liu, Patrick K. Kimes, Brian D. Muegge, Katherine F. Simpson, Matthew A. Ciorba, Jacqueline G. Perrigoue, Joshua R. Friedman, Jennifer E. Towne, Richard D. Head, Thaddeus S. Stappenbeck
Article
Microbiology
Umang Jain, Chin-Wen Lai, Shanshan Xiong, Victoria M. Goodwin, Qiuhe Lu, Brian D. Muegge, George P. Christophi, Kelli L. VanDussen, Bethany P. Cummings, Erick Young, John Hambor, Thaddeus S. Stappenbeck
CELL HOST & MICROBE
(2018)
Article
Multidisciplinary Sciences
Sathish Subramanian, Sayeeda Huq, Tanya Yatsunenko, Rashidul Haque, Mustafa Mahfuz, Mohammed A. Alam, Amber Benezra, Joseph DeStefano, Martin F. Meier, Brian D. Muegge, Michael J. Barratt, Laura G. VanArendonk, Qunyuan Zhang, Michael A. Province, William A. Petri, Tahmeed Ahmed, Jeffrey I. Gordon
Article
Biotechnology & Applied Microbiology
Pelin Yilmaz, Renzo Kottmann, Dawn Field, Rob Knight, James R. Cole, Linda Amaral-Zettler, Jack A. Gilbert, Ilene Karsch-Mizrachi, Anjanette Johnston, Guy Cochrane, Robert Vaughan, Christopher Hunter, Joonhong Park, Norman Morrison, Philippe Rocca-Serra, Peter Sterk, Manimozhiyan Arumugam, Mark Bailey, Laura Baumgartner, Bruce W. Birren, Martin J. Blaser, Vivien Bonazzi, Tim Booth, Peer Bork, Frederic D. Bushman, Pier Luigi Buttigieg, Patrick S. G. Chain, Emily Charlson, Elizabeth K. Costello, Heather Huot-Creasy, Peter Dawyndt, Todd DeSantis, Noah Fierer, Jed A. Fuhrman, Rachel E. Gallery, Dirk Gevers, Richard A. Gibbs, Inigo San Gil, Antonio Gonzalez, Jeffrey I. Gordon, Robert Guralnick, Wolfgang Hankeln, Sarah Highlander, Philip Hugenholtz, Janet Jansson, Andrew L. Kau, Scott T. Kelley, Jerry Kennedy, Dan Knights, Omry Koren, Justin Kuczynski, Nikos Kyrpides, Robert Larsen, Christian L. Lauber, Teresa Legg, Ruth E. Ley, Catherine A. Lozupone, Wolfgang Ludwig, Donna Lyons, Eamonn Maguire, Barbara A. Methe, Folker Meyer, Brian Muegge, Sara Nakielny, Karen E. Nelson, Diana Nemergut, Josh D. Neufeld, Lindsay K. Newbold, Anna E. Oliver, Norman R. Pace, Giriprakash Palanisamy, Joerg Peplies, Joseph Petrosino, Lita Proctor, Elmar Pruesse, Christian Quast, Jeroen Raes, Sujeevan Ratnasingham, Jacques Ravel, David A. Relman, Susanna Assunta-Sansone, Patrick D. Schloss, Lynn Schriml, Rohini Sinha, Michelle I. Smith, Erica Sodergren, Ayme Spor, Jesse Stombaugh, James M. Tiedje, Doyle V. Ward, George M. Weinstock, Doug Wendel, Owen White, Andrew Whiteley, Andreas Wilke, Jennifer R. Wortman, Tanya Yatsunenko, Frank Oliver Gloeckner
NATURE BIOTECHNOLOGY
(2011)
Article
Multidisciplinary Sciences
Brian D. Muegge, Justin Kuczynski, Dan Knights, Jose C. Clemente, Antonio Gonzalez, Luigi Fontana, Bernard Henrissat, Rob Knight, Jeffrey I. Gordon
Article
Multidisciplinary Sciences
Matthew W. Horton, Natacha Bodenhausen, Kathleen Beilsmith, Dazhe Meng, Brian D. Muegge, Sathish Subramanian, M. Madlen Vetter, Bjarni J. Vilhjalmsson, Magnus Nordborg, Jeffrey I. Gordon, Joy Bergelson
NATURE COMMUNICATIONS
(2014)
Article
Biochemistry & Molecular Biology
Nathan P. McNulty, Meng Wu, Alison R. Erickson, Chongle Pan, Brian K. Erickson, Eric C. Martens, Nicholas A. Pudlo, Brian D. Muegge, Bernard Henrissat, Robert L. Hettich, Jeffrey I. Gordon
Article
Cell Biology
Gerard E. Kaiko, Feidi Chen, Chin-Wen Lai, I-Ling Chiang, Jacqueline Perrigoue, Aleksandar Stojmirovic, Katherine Li, Brian D. Muegge, Umang Jain, Kelli L. VanDussen, Bridie J. Goggins, Simon Keely, Jessica Weaver, Paul S. Foster, Daniel A. Lawrence, Ta-Chiang Liu, Thaddeus S. Stappenbeck
SCIENCE TRANSLATIONAL MEDICINE
(2019)
Article
Biochemistry & Molecular Biology
Yi Wang, I-Ling Chiang, Takahiro E. Ohara, Satoru Fujii, Jiye Cheng, Brian D. Muegge, Aaron Ver Heul, Nathan D. Han, Qiuhe Lu, Shanshan Xiong, Feidi Chen, Chin-Wen Lai, Hana Janova, Renee Wu, Charles E. Whitehurst, Kelli L. VanDussen, Ta-Chiang Liu, Jeffrey I. Gordon, L. David Sibley, Thaddeus S. Stappenbeck
Article
Multidisciplinary Sciences
Umang Jain, Aaron M. Ver Heul, Shanshan Xiong, Martin H. Gregory, Elora G. Demers, Justin T. Kern, Chin-Wen Lai, Brian D. Muegge, Derek A. G. Barisas, J. Steven Leal-Ekman, Parakkal Deepak, Matthew A. Ciorba, Ta-Chiang Liu, Deborah A. Hogan, Philip Debbas, Jonathan Braun, Dermot P. B. McGovern, David M. Underhill, Thaddeus S. Stappenbeck
Summary: The study revealed that Debaryomyces hansenii fungus inhabits incompletely healed intestinal wounds of mice and inflamed mucosal tissues of CD patients, impairing colonic healing. Mechanistically, D. hansenii affects mucosal healing through the myeloid cell-specific type 1 interferon-CCL5 axis.
Article
Gastroenterology & Hepatology
Shanshan Xiong, Charles E. Whitehurst, Li Li, Gyu Seong Heo, Chin-Wen Lai, Umang Jain, Brian D. Muegge, Scott T. Espenschied, Ryan J. Musich, Minhu Chen, Yongjian Liu, Ta-Chiang Liu, Thaddeus S. Stappenbeck
Summary: The study identified a transcriptional signature of mesenteric fibrosis in Crohn's disease patients and modeled a mouse model to simulate this condition. They found differentially expressed genes enriched in the mesenteric fat of CD subjects with high levels of fibrosis and identified a 24-gene set associated with inflammatory fibroblasts and treatment response.
Article
Immunology
I-Ling Chiang, Yi Wang, Satoru Fujii, Brian D. Muegge, Qiuhe Lu, Phillip Tarr, Thaddeus S. Stappenbeck
Summary: Research suggests that Shigella infection is more likely to occur in the colon than the small intestine. Experimental results indicate that the acidic pH in the colonic environment promotes Shigella to form biofilms and enhance virulence, while the alkaline pH in the small intestine inhibits these processes.
INFECTION AND IMMUNITY
(2021)
Article
Multidisciplinary Sciences
Jung Hoon Cho, Zipeng A. Li, Lifei Zhu, Brian D. Muegge, Henry F. Roseman, Eun Young Lee, Toby Utterback, Louis G. Woodhams, Philip V. Bayly, Jing W. Hughes
Summary: Primary cilia in pancreatic islets have both sensory and motile function, and play a regulatory role in insulin secretion.
Article
Immunology
Chin-Wen Lai, Prachi Bagadia, Derek A. G. Barisas, Nicholas N. Jarjour, Rachel Wong, Takahiro Ohara, Brian D. Muegge, Qiuhe Lu, Shanshan Xiong, Brian T. Edelson, Kenneth M. Murphy, Thaddeus S. Stappenbeck
Summary: The local microenvironment plays a crucial role in macrophage differentiation. In the peritoneum, apart from retinoic acid, local factors including Msln and Muc16 secreted by mesothelial cells influence the expression of GATA6 in peritoneal macrophages. This effect is most prominent in monocyte-derived macrophages during aging and in response to infection.
JOURNAL OF IMMUNOLOGY
(2022)
Article
Endocrinology & Metabolism
Jing W. Hughes, Brian D. Muegge, Garry S. Tobin, Marina Litvin, Lulu Sun, Jose B. Saenz, C. Prakash Gyawali, Janet B. McGill
ENDOCRINE PRACTICE
(2017)