1
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Zhong Q, Zhong Q, Lai B. Infantile neuroaxonal dystrophy causing iron deposition in the bilateral globus pallidus. QJM 2024; 117:137-138. [PMID: 37758252 DOI: 10.1093/qjmed/hcad217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Indexed: 10/03/2023] Open
Affiliation(s)
- Q Zhong
- Department of Neurology, Ganzhou People's Hospital, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, Jiangxi 341000, China
| | - Q Zhong
- Department of Medical Imaging, Ganzhou People's Hospital, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, Jiangxi 341000, China
| | - B Lai
- Department of Medical Imaging, Ganzhou People's Hospital, Ganzhou Hospital-Nanfang Hospital, Southern Medical University, Ganzhou, Jiangxi 341000, China
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2
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Campbell JX, Schulte NB, Lai B, Harris HH, Franz KJ. Histatin-5 interacts with cellular copper to promote antifungal activity against Candida albicans. Metallomics 2023; 15:mfad070. [PMID: 38061812 PMCID: PMC10733623 DOI: 10.1093/mtomcs/mfad070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 12/06/2023] [Indexed: 12/22/2023]
Abstract
Histatin-5 (Hist-5) is an antimicrobial peptide found in human saliva that functions to defend the oral cavity from microbial infections, such as those caused by the fungal pathogen Candida albicans (C. albicans). Hist-5 can bind Cu in multiple oxidation states, Cu2+ and Cu+in vitro, and supplemental Cu2+ has been shown to improve the fungicidal activity of the peptide against C. albicans in culture. However, the exact role of Cu on the antifungal activity of Hist-5 and whether direct peptide-Cu interactions occur intracellularly has yet to be fully determined. Here, we used a combination of fluorescence spectroscopy and confocal microscopy experiments to show reversible Cu-dependent quenching of a fluorescent Hist-5 analogue, Hist-5*, indicating a direct interaction between Hist-5 and intracellular Cu. X-ray fluorescence microscopy images revealed peptide-induced changes to cellular Cu distribution and cell-associated Cu content. These data support a model in which Hist-5 can facilitate the hyperaccumulation of Cu in C. albicans and directly interact with Cu intracellularly to increase the fungicidal activity of Hist-5.
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Affiliation(s)
| | | | - Barry Lai
- X-ray Science Division, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Hugh H Harris
- Department of Chemistry, The University of Adelaide, Adelaide, South Australia 5005, Australia
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3
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Hidalgo J, Kaiser W, An Y, Li R, Oh Z, Castro-Méndez AF, LaFollette DK, Kim S, Lai B, Breternitz J, Schorr S, Perini CAR, Mosconi E, De Angelis F, Correa-Baena JP. Synergistic Role of Water and Oxygen Leads to Degradation in Formamidinium-Based Halide Perovskites. J Am Chem Soc 2023; 145. [PMID: 37917967 PMCID: PMC10655111 DOI: 10.1021/jacs.3c05657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 11/04/2023]
Abstract
Mixed-cation metal halide perovskites have shown remarkable progress in photovoltaic applications with high power conversion efficiencies. However, to achieve large-scale deployment of this technology, efficiencies must be complemented by long-term durability. The latter is limited by external factors, such as exposure to humidity and air, which lead to the rapid degradation of the perovskite materials and devices. In this work, we study the mechanisms causing Cs and formamidinium (FA)-based halide perovskite phase transformations and stabilization during moisture and air exposure. We use in situ X-ray scattering, X-ray photoelectron spectroscopy, and first-principles calculations to study these chemical interactions and their effects on structure. We unravel a surface reaction pathway involving the dissolution of FAI by water and iodide oxidation by oxygen, driving the Cs/FA ratio into thermodynamically unstable regions, leading to undesirable phase transformations. This work demonstrates the interplay of bulk phase transformations with surface chemical reactions, providing a detailed understanding of the degradation mechanism and strategies for designing durable and efficient perovskite materials.
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Affiliation(s)
- Juanita Hidalgo
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Waldemar Kaiser
- Computational
Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta”
(CNR-SCITEC), Perugia 06123, Italy
| | - Yu An
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Ruipeng Li
- National
Synchrotron Light Source II, Brookhaven
National Lab, Upton, New York 11973, United States
| | - Zion Oh
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Andrés-Felipe Castro-Méndez
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Diana K. LaFollette
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Sanggyun Kim
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Barry Lai
- Advanced
Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Joachim Breternitz
- Department
of Structure and Dynamics of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
| | - Susan Schorr
- Department
of Structure and Dynamics of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, Berlin 14109, Germany
- Freie Universitaet
Berlin, Institute of Geological Sciences, Malteser Str. 74-200, Berlin 12249, Germany
| | - Carlo A. R. Perini
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Edoardo Mosconi
- Computational
Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta”
(CNR-SCITEC), Perugia 06123, Italy
| | - Filippo De Angelis
- Computational
Laboratory for Hybrid/Organic Photovoltaics (CLHYO), Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta”
(CNR-SCITEC), Perugia 06123, Italy
- Department
of Chemistry, Biology and Biotechnology, University of Perugia and UdR INSTM, Perugia 06123, Italy
- Department
of Natural Sciences & Mathematics, College of Sciences & Human
Studies, Prince Mohammad Bin Fahd University, Dhahran 34754, Saudi Arabia
- SKKU
Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 440-746, Korea
| | - Juan-Pablo Correa-Baena
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
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4
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Carrall JA, Lie W, Lambert JM, Harris HH, Lai B, Dillon CT. Optimizing Arsenic Therapy by Selectively Targeting Leukemia Cells. J Med Chem 2023; 66:12101-12114. [PMID: 37594965 DOI: 10.1021/acs.jmedchem.3c00676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
Abstract
Arsenic, in the simple form of arsenic trioxide, is currently marketed for the treatment of acute promyelocytic leukemia. Due to the multifaceted mechanisms of action of arsenic, it has also shown promise in other types of leukemias but is hindered by its toxic effects toward normal cells. This research has aimed to determine whether tumor-homing peptide complexes of arsenic can be designed and developed to strategically target specific cancers. The end goal is to achieve dose reduction and decreased side effects of the resultant arsenic therapeutic agent. In this article, we present the synthesis, characterization, and stability studies of a new class of As-peptide complexes designed to target leukemia. In vitro biological studies of the most stable complex show 1000 times greater toxicity toward leukemia cells over human blood cells, indicating potential for progression to in vivo studies.
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Affiliation(s)
- Judith A Carrall
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong 2522, New South Wales, Australia
| | - Wilford Lie
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong 2522, New South Wales, Australia
| | - Jacob M Lambert
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong 2522, New South Wales, Australia
- Molecular Horizons, University of Wollongong, Wollongong 2522, New South Wales, Australia
| | - Hugh H Harris
- School of Physical Sciences, The University of Adelaide, Adelaide 5005, South Australia, Australia
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont 60439, Illinois, United States
| | - Carolyn T Dillon
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong 2522, New South Wales, Australia
- Molecular Horizons, University of Wollongong, Wollongong 2522, New South Wales, Australia
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5
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Fan S, Lai B, Elzinga EJ, Ingall ED, Morton PL, Gao Y. Spatial variability of aerosol iron mineralogy and oxidation states over the Arctic Ocean. Sci Total Environ 2023; 889:164301. [PMID: 37216989 DOI: 10.1016/j.scitotenv.2023.164301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/06/2023] [Accepted: 05/16/2023] [Indexed: 05/24/2023]
Abstract
The mineralogy and oxidation state of aerosol iron (Fe) play important roles in controlling aerosol Fe solubility and consequent bioavailability in seawater. In this study, the spatial variability of Fe mineralogy and oxidation states in aerosols collected during the US GEOTRACES Western Arctic cruise (GN01) were determined using synchrotron-based X-ray absorption near edge structure (XANES) spectroscopy. Both Fe(II) minerals (biotite, ilmenite) and Fe(III) minerals (ferrihydrite, hematite, Fe(III) phosphate) were found in these samples. However, aerosol Fe mineralogy and solubility observed during this cruise varied spatially and can be grouped into three clusters based on the air masses that affected aerosols collected in different regions: (1) biotite-enriched particles (87 % biotite, 13 % hematite) with the air masses passing over Alaska, showing relatively low Fe solubility (4.0 ± 1.7 %); (2) ferrihydrite-enriched particles (82 % ferrihydrite, 18 % ilmenite) collected in the remote Arctic air, showing relatively high Fe solubility (9.6 ± 3.3 %); (3) the fresh dust derived from North America and Siberia, primarily dominated by hematite (41 % hematite, 25 % Fe(III) phosphate, 20 % biotite, 13 % ferrihydrite), showing relatively low Fe solubility (5.1 ± 3.5). A significant positive correlation was found between Fe oxidation state and Fe fractional solubility, suggesting that long-range transport could modify iron (hydr) oxide such as ferrihydrite through atmospheric processing, influencing aerosol Fe solubility and consequently Fe bioavailability in the remote Arctic Ocean.
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Affiliation(s)
- Songyun Fan
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Evert J Elzinga
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA
| | - Ellery D Ingall
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Peter L Morton
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA; Geochemistry Group, Florida State University, Tallahassee, FL 32310, USA; The Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL 32310, USA
| | - Yuan Gao
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA.
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6
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Copeland-Hardin L, Paunesku T, Murley JS, Crentsil J, Antipova O, Li L, Maxey E, Jin Q, Hooper D, Lai B, Chen S, Woloschak GE. Proof of principle study: synchrotron X-ray fluorescence microscopy for identification of previously radioactive microparticles and elemental mapping of FFPE tissues. Sci Rep 2023; 13:7806. [PMID: 37179410 PMCID: PMC10183016 DOI: 10.1038/s41598-023-34890-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/09/2023] [Indexed: 05/15/2023] Open
Abstract
Biobanks containing formalin-fixed, paraffin-embedded (FFPE) tissues from animals and human atomic-bomb survivors exposed to radioactive particulates remain a vital resource for understanding the molecular effects of radiation exposure. These samples are often decades old and prepared using harsh fixation processes which limit sample imaging options. Optical imaging of hematoxylin and eosin (H&E) stained tissues may be the only feasible processing option, however, H&E images provide no information about radioactive microparticles or radioactive history. Synchrotron X-ray fluorescence microscopy (XFM) is a robust, non-destructive, semi-quantitative technique for elemental mapping and identifying candidate chemical element biomarkers in FFPE tissues. Still, XFM has never been used to uncover distribution of formerly radioactive micro-particulates in FFPE canine specimens collected more than 30 years ago. In this work, we demonstrate the first use of low-, medium-, and high-resolution XFM to generate 2D elemental maps of ~ 35-year-old, canine FFPE lung and lymph node specimens stored in the Northwestern University Radiobiology Archive documenting distribution of formerly radioactive micro-particulates. Additionally, we use XFM to identify individual microparticles and detect daughter products of radioactive decay. The results of this proof-of-principle study support the use of XFM to map chemical element composition in historic FFPE specimens and conduct radioactive micro-particulate forensics.
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Affiliation(s)
- Letonia Copeland-Hardin
- Department of Radiation Oncology and Department of Radiology, Feinberg School of Medicine, Northwestern University, 300 E. Superior St., Tarry 4-713, Chicago, IL, 60611, USA
| | - Tatjana Paunesku
- Department of Radiation Oncology and Department of Radiology, Feinberg School of Medicine, Northwestern University, 300 E. Superior St., Tarry 4-713, Chicago, IL, 60611, USA
| | - Jeffrey S Murley
- Department of Radiation Oncology and Department of Radiology, Feinberg School of Medicine, Northwestern University, 300 E. Superior St., Tarry 4-713, Chicago, IL, 60611, USA
| | - Jasson Crentsil
- Department of Radiation Oncology and Department of Radiology, Feinberg School of Medicine, Northwestern University, 300 E. Superior St., Tarry 4-713, Chicago, IL, 60611, USA
| | - Olga Antipova
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - LuXi Li
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Evan Maxey
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Qiaoling Jin
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - David Hooper
- Nuclear Nonproliferation Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Barry Lai
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Si Chen
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
| | - Gayle E Woloschak
- Department of Radiation Oncology and Department of Radiology, Feinberg School of Medicine, Northwestern University, 300 E. Superior St., Tarry 4-713, Chicago, IL, 60611, USA.
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7
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Perini CAR, Rojas-Gatjens E, Ravello M, Castro-Mendez AF, Hidalgo J, An Y, Kim S, Lai B, Li R, Silva-Acuña C, Correa-Baena JP. Interface Reconstruction from Ruddlesden-Popper Structures Impacts Stability in Lead Halide Perovskite Solar Cells. Adv Mater 2022; 34:e2204726. [PMID: 36245328 DOI: 10.1002/adma.202204726] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/24/2022] [Indexed: 06/16/2023]
Abstract
The impact of the bulky-cation-modified interfaces on halide perovskite solar cell stability is underexplored. In this work, the thermal instability of the bulky-cation interface layers used in the state-of-the-art solar cells is demonstrated. X-ray photoelectron spectroscopy and synchrotron-based grazing-incidence X-ray scattering measurements reveal significant changes in the chemical composition and structure at the surface of these films that occur under thermal stress. The changes impact charge-carrier dynamics and device operation, as shown in transient photoluminescence, excitation correlation spectroscopy, and solar cells. The type of cation used for surface treatment affects the extent of these changes, where long carbon chains provide more stable interfaces. These results highlight that prolonged annealing of the treated interfaces is critical to enable reliable reporting of performances and to drive the selection of different bulky cations.
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Affiliation(s)
| | - Esteban Rojas-Gatjens
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Magdalena Ravello
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | | | - Juanita Hidalgo
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yu An
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Sanggyun Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL, 60439, USA
| | - Ruipeng Li
- National Synchrotron Light Source II (NSLS-II), Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Carlos Silva-Acuña
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Physics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Juan-Pablo Correa-Baena
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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8
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Quek JS, Lai B, Yap AU, Hu S. Non-pharmacological management of dental fear and anxiety in children and adolescents: An umbrella review. Eur J Paediatr Dent 2022; 23:230-242. [PMID: 36172904 DOI: 10.23804/ejpd.2022.23.03.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
AIM To synthesise knowledge on the relative efficacies of non-pharmacological strategies for managing dental fear and anxiety (DFA) in children and adolescents, specifically their effects on behaviour, anxiety levels and pain perception. METHODS An umbrella review on non-pharmacological strategies used to manage DFA in children and adolescents was conducted based the Joanna Briggs Institute methodology. Searches were performed in 5 main electronic databases and the grey-literature. Two independent reviewers selected and appraised the included studies using the AMSTAR2 tool. Disagreements were resolved by a third reviewer. CONCLUSION Audio-visual distraction was effective in reducing anxiety during a variety of dental procedures including those requiring local anaesthesia. A combination of techniques may be more effective in managing DFA in children and adolescents, possibly improving pain perception and cooperative behaviour.
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Affiliation(s)
- J S Quek
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
| | - B Lai
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
| | - A U Yap
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
| | - S Hu
- National Dental Centre Singapore Department of Restorative Dentistry, Ng Teng Fong General Hospital, Singapore Faculty of Dentistry, National University of Singapore
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9
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Rojsatien S, Mannodi-Kanakkithodi A, Walker T, Nietzold T, Colegrove E, Lai B, Cai Z, Holt M, Chan MK, Bertoni MI. Quantitative analysis of Cu XANES spectra using linear combination fitting of binary mixtures simulated by FEFF9. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Castro-Méndez AF, Perini CAR, Hidalgo J, Ranke D, Vagott JN, An Y, Lai B, Luo Y, Li R, Correa-Baena JP. Formation of a Secondary Phase in Thermally Evaporated MAPbI 3 and Its Effects on Solar Cell Performance. ACS Appl Mater Interfaces 2022; 14:34269-34280. [PMID: 35561234 DOI: 10.1021/acsami.2c02036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Thermal evaporation is a promising deposition technique to scale up perovskite solar cells (PSCs) to large areas, but the lack of understanding of the mechanisms that lead to high-quality evaporated methylammonium lead triiodide (MAPbI3) films gives rise to devices with efficiencies lower than those obtained by spin coating. This work investigates the crystalline properties of MAPbI3 deposited by the thermal coevaporation of PbI2 and MAI, where the MAI evaporation rate is controlled by setting different temperatures for the MAI source and the PbI2 deposition rate is controlled with a quartz crystal microbalance (QCM). Using grazing incident wide-angle X-ray scattering (GIWAXS) and X-ray diffraction (XRD), we identify the formation of a secondary orthorhombic phase (with a Pnma space group) that appears at MAI source temperatures below 155 °C. With synchrotron-based X-ray fluorescence (XRF) microscopy, we show that the changes in crystalline phases are not necessarily due to changes in stoichiometry. The films show a stochiometric composition when the MAI source is heated between 140 to 155 °C, and the samples become slightly MAI rich at 165 °C. Increasing the MAI temperature beyond 165 °C introduces an excess of MAI in the film, which promotes the formation of films with low crystallinity that contain low-dimensional perovskites. When they are incorporated in solar cells, the films deposited at 165 °C result in the champion power conversion efficiency, although the presence of a small amount of low-dimensional perovskite may lead to a lower open-circuit voltage. We hypothesize that the formation of secondary phases in evaporated films limits the performance of PSCs and that their formation can be suppressed by controlling the MAI source temperature, bringing the film toward a phase-pure tetragonal structure. Control of the phases during perovskite evaporation is therefore crucial to obtain high-performance solar cells.
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Affiliation(s)
- Andrés-Felipe Castro-Méndez
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
| | - Carlo A R Perini
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
| | - Juanita Hidalgo
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
| | - Daniel Ranke
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
| | - Jacob N Vagott
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
| | - Yu An
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States
| | - Yanqi Luo
- Advanced Photon Source, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Juan-Pablo Correa-Baena
- School of Materials Science and Engineering, Georgia Institute of Technology, North Avenue NW, Atlanta, Georgia 30332, United States
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11
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Deng J, Yao Y, Jiang Y, Chen S, Mooney TM, Klug JA, Marin FS, Roehrig C, Yue K, Preissner C, Cai Z, Lai B, Vogt S. High-resolution ptychographic imaging enabled by high-speed multi-pass scanning. Opt Express 2022; 30:26027-26042. [PMID: 36236801 DOI: 10.1364/oe.460232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/18/2022] [Indexed: 06/16/2023]
Abstract
As a coherent diffraction imaging technique, ptychography provides high-spatial resolution beyond Rayleigh's criterion of the focusing optics, but it is also sensitively affected by the decoherence coming from the spatial and temporal variations in the experiment. Here we show that high-speed ptychographic data acquisition with short exposure can effectively reduce the impact from experimental variations. To reach a cumulative dose required for a given resolution, we further demonstrate that a continuous multi-pass scan via high-speed ptychography can achieve high-resolution imaging. This low-dose scan strategy is shown to be more dose-efficient, and has potential for radiation-sensitive sample studies and time-resolved imaging.
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12
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Fan S, Gao Y, Lai B, Elzinga EJ, Yu S. Aerosol iron speciation and seasonal variation of iron oxidation state over the western Antarctic Peninsula. Sci Total Environ 2022; 824:153890. [PMID: 35182624 DOI: 10.1016/j.scitotenv.2022.153890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 02/07/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
The iron (Fe) speciation and oxidation state have been considered critical factors affecting Fe solubility in the atmosphere and bioavailability in the surface ocean. In this study, elemental composition and Fe speciation in aerosol samples collected at the Palmer Station in the West Antarctic Peninsula were determined using synchrotron-based X-ray fluorescence (XRF) and X-ray Absorption Near-Edge Structure (XANES) spectroscopy. The elemental composition of coarse-mode (>1 μm) Fe-containing particles suggests that the region's crustal emission is the primary source of aerosol Fe. The Fe minerals in these aerosol particles were predominantly hematite and biotite, but minor fractions of pyrite and ilmenite were observed as well. The Fe oxidation state showed an evident seasonal variation. The Fe(II) content accounted for 71% of the total Fe in the austral summer, while this fraction dropped to 60% in the austral winter. Multivariate linear models involving meteorological parameters suggested that the wind speed, relative humidity, and solar irradiance were the factors that significantly controlled the percentage of Fe(II) in the austral summer. On the contrary, no relationship was found between these factors and the Fe(II) percentage in the austral winter, suggesting that atmospheric photoreduction and regional dust emission were limited. Moreover, the snow depth was significantly (p < 0.05) correlated with the aerosol Fe concentration, confirming the limiting effect of snow/ice cover on the regional dust emission. Given that the Antarctic Peninsula has experienced rapid warming during recent decades, the ice-free areas in the Antarctic Peninsula may act as potential dust sources.
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Affiliation(s)
- Songyun Fan
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA
| | - Yuan Gao
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA.
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Evert J Elzinga
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA
| | - Shun Yu
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, USA
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13
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Walker T, Nietzold T, Kumar NM, Lai B, Stone K, Stuckelberger ME, Bertoni MI. Development of an operando characterization stage for multi-modal synchrotron x-ray experiments. Rev Sci Instrum 2022; 93:065113. [PMID: 35778008 DOI: 10.1063/5.0087050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/22/2022] [Indexed: 06/15/2023]
Abstract
It is widely accepted that micro- and nanoscale inhomogeneities govern the performance of many thin-film solar cell absorbers. These inhomogeneities yield material properties (e.g., composition, structure, and charge collection) that are challenging to correlate across length scales and measurement modalities. The challenge is compounded if a correlation is sought during device operation or in conditions that mimic aging under particular stressors (e.g., heat and electrical bias). Correlative approaches, particularly those based on synchrotron x-ray sources, are powerful since they can access several material properties in different modes (e.g., fluorescence, diffraction, and absorption) with minimal sample preparation. Small-scale laboratory x-ray instruments have begun to offer multi-modality but are typically limited by low x-ray photon flux, low spatial resolution, or specific sample sizes. To overcome these limitations, a characterization stage was developed to enable multi-scale, multi-modal operando measurements of industrially relevant photovoltaic devices. The stage offers compatibility across synchrotron x-ray facilities, enabling correlation between nanoscale x-ray fluorescence microscopy, microscale x-ray diffraction microscopy, and x-ray beam induced current microscopy, among others. The stage can accommodate device sizes up to 25 × 25 mm2, offering access to multiple regions of interest and increasing the statistical significance of correlated properties. The stage materials can sustain humid and non-oxidizing atmospheres, and temperature ranges encountered by photovoltaic devices in operational environments (e.g., from 25 to 100 °C). As a case study, we discuss the functionality of the stage by studying Se-alloyed CdTe photovoltaic devices aged in the stage between 25 and 100 °C.
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Affiliation(s)
- Trumann Walker
- Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, Arizona 85282, USA
| | - Tara Nietzold
- Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, Arizona 85282, USA
| | - Niranjana Mohan Kumar
- Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, Arizona 85282, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Kevin Stone
- Stanford Synchrotron Light Source, Stanford Linear Accelerator Laboratory, Menlo Park, California 94025, USA
| | | | - Mariana I Bertoni
- Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, Arizona 85282, USA
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14
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Lai B, Phan K, Lewis N, Shumack S. A rare case of vernal keratoconjunctivitis in a patient with atopic dermatitis treated with tralokinumab. J Eur Acad Dermatol Venereol 2021; 36:e343-e345. [PMID: 34807480 DOI: 10.1111/jdv.17824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/03/2021] [Accepted: 11/17/2021] [Indexed: 12/14/2022]
Affiliation(s)
- B Lai
- St George Dermatology and Skin Cancer Centre, Kogarah, NSW, Australia
| | - K Phan
- St George Dermatology and Skin Cancer Centre, Kogarah, NSW, Australia
| | - N Lewis
- Department of Ophthalmology, Royal North Shore Hospital, St Leonards, NSW, Australia.,University of Sydney Medical School, Sydney, NSW, Australia
| | - S Shumack
- St George Dermatology and Skin Cancer Centre, Kogarah, NSW, Australia.,University of Sydney Medical School, Sydney, NSW, Australia.,Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia
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15
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Huang Z, King AP, Lovett J, Lai B, Woods JJ, Harris HH, Wilson JJ. Photochemistry and in vitro anticancer activity of Pt(IV)Re(I) conjugates. Chem Commun (Camb) 2021; 57:11189-11192. [PMID: 34622255 DOI: 10.1039/d1cc04669a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The photophysical and photochemical properties of two Pt(IV)Re(I) conjugates were studied via both experimental and computational methods. Both conjugates exhibit modest photocytotoxicity against ovarian cancer cells. X-ray fluorescence microscopy showed that Pt and Re colocalize in cells whether they had been irradiated or not. This work demonstrates the potential of photoactivated multilimetallic agents for combating cancer.
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Affiliation(s)
- Zhouyang Huang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
| | - A Paden King
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
| | - James Lovett
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Barry Lai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Joshua J Woods
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA. .,Robert F. Smith School for Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA
| | - Hugh H Harris
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
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16
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Kumthekar P, Ko CH, Paunesku T, Dixit K, Sonabend AM, Bloch O, Tate M, Schwartz M, Zuckerman L, Lezon R, Lukas RV, Jovanovic B, McCortney K, Colman H, Chen S, Lai B, Antipova O, Deng J, Li L, Tommasini-Ghelfi S, Hurley LA, Unruh D, Sharma NV, Kandpal M, Kouri FM, Davuluri RV, Brat DJ, Muzzio M, Glass M, Vijayakumar V, Heidel J, Giles FJ, Adams AK, James CD, Woloschak GE, Horbinski C, Stegh AH. A first-in-human phase 0 clinical study of RNA interference-based spherical nucleic acids in patients with recurrent glioblastoma. Sci Transl Med 2021; 13:13/584/eabb3945. [PMID: 33692132 DOI: 10.1126/scitranslmed.abb3945] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 02/19/2021] [Indexed: 12/13/2022]
Abstract
Glioblastoma (GBM) is one of the most difficult cancers to effectively treat, in part because of the lack of precision therapies and limited therapeutic access to intracranial tumor sites due to the presence of the blood-brain and blood-tumor barriers. We have developed a precision medicine approach for GBM treatment that involves the use of brain-penetrant RNA interference-based spherical nucleic acids (SNAs), which consist of gold nanoparticle cores covalently conjugated with radially oriented and densely packed small interfering RNA (siRNA) oligonucleotides. On the basis of previous preclinical evaluation, we conducted toxicology and toxicokinetic studies in nonhuman primates and a single-arm, open-label phase 0 first-in-human trial (NCT03020017) to determine safety, pharmacokinetics, intratumoral accumulation and gene-suppressive activity of systemically administered SNAs carrying siRNA specific for the GBM oncogene Bcl2Like12 (Bcl2L12). Patients with recurrent GBM were treated with intravenous administration of siBcl2L12-SNAs (drug moniker: NU-0129), at a dose corresponding to 1/50th of the no-observed-adverse-event level, followed by tumor resection. Safety assessment revealed no grade 4 or 5 treatment-related toxicities. Inductively coupled plasma mass spectrometry, x-ray fluorescence microscopy, and silver staining of resected GBM tissue demonstrated that intravenously administered SNAs reached patient tumors, with gold enrichment observed in the tumor-associated endothelium, macrophages, and tumor cells. NU-0129 uptake into glioma cells correlated with a reduction in tumor-associated Bcl2L12 protein expression, as indicated by comparison of matched primary tumor and NU-0129-treated recurrent tumor. Our results establish SNA nanoconjugates as a potential brain-penetrant precision medicine approach for the systemic treatment of GBM.
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Affiliation(s)
- Priya Kumthekar
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA.
| | - Caroline H Ko
- International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208, USA
| | - Tatjana Paunesku
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Karan Dixit
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Adam M Sonabend
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Orin Bloch
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Matthew Tate
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Margaret Schwartz
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Laura Zuckerman
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Ray Lezon
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Rimas V Lukas
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Borko Jovanovic
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Kathleen McCortney
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Howard Colman
- Huntsman Cancer Institute and Department of Neurosurgery, University of Utah, Salt Lake City, UT 84112, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Olga Antipova
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Junjing Deng
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Luxi Li
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Serena Tommasini-Ghelfi
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Lisa A Hurley
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Dusten Unruh
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Nitya V Sharma
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Manoj Kandpal
- Preventive Medicine, Health and Biomedical Informatics, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Fotini M Kouri
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Ramana V Davuluri
- Preventive Medicine, Health and Biomedical Informatics, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Daniel J Brat
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Miguel Muzzio
- Life Sciences Group, IIT Research Institute, Chicago, IL 60616, USA
| | | | | | | | - Francis J Giles
- Developmental Therapeutics Program of the Division of Hematology Oncology, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA
| | - Ann K Adams
- Office for Research, Northwestern University, Evanston, IL 60208, USA
| | - C David James
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Gayle E Woloschak
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Craig Horbinski
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.,Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Alexander H Stegh
- Ken and Ruth Davee Department of Neurology, The Northwestern Malnati Brain Tumor Institute, Feinberg School of Medicine, The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL 60611, USA. .,International Institute for Nanotechnology, Northwestern University, Evanston, IL 60208, USA
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17
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Liu W, Mirzoeva S, Yuan Y, Deng J, Chen S, Lai B, Vogt S, Shah K, Shroff R, Bleher R, Jin Q, Vo N, Bazak R, Ritner C, Gutionov S, Raha S, Sedlmair J, Hirschmugl C, Jacobsen C, Paunesku T, Kalapurkal J, Woloschak GE. Development of Fe3O4 core–TiO2 shell nanocomposites and nanoconjugates as a foundation for neuroblastoma radiosensitization. Cancer Nanotechnol 2021; 12:12. [PMID: 34777621 PMCID: PMC8550682 DOI: 10.1186/s12645-021-00081-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 03/16/2021] [Indexed: 12/17/2022] Open
Abstract
Abstract
Background
Neuroblastoma is the most common extracranial solid malignancy in childhood which, despite the current progress in radiotherapy and chemotherapy protocols, still has a high mortality rate in high risk tumors. Nanomedicine offers exciting and unexploited opportunities to overcome the shortcomings of conventional medicine. The photocatalytic properties of Fe3O4 core-TiO2 shell nanocomposites and their potential for cell specific targeting suggest that nanoconstructs produced using Fe3O4 core-TiO2 shell nanocomposites could be used to enhance radiation effects in neuroblastoma. In this study, we evaluated bare, metaiodobenzylguanidine (MIBG) and 3,4-Dihydroxyphenylacetic acid (DOPAC) coated Fe3O4@TiO2 as potential radiosensitizers for neuroblastoma in vitro.
Results
The uptake of bare and MIBG coated nanocomposites modestly sensitized neuroblastoma cells to ionizing radiation. Conversely, cells exposed to DOPAC coated nanocomposites exhibited a five-fold enhanced sensitivity to radiation, increased numbers of radiation induced DNA double-strand breaks, and apoptotic cell death. The addition of a peptide mimic of the epidermal growth factor (EGF) to nanoconjugates coated with MIBG altered their intracellular distribution. Cryo X-ray fluorescence microscopy tomography of frozen hydrated cells treated with these nanoconjugates revealed cytoplasmic as well as nuclear distribution of the nanoconstructs.
Conclusions
The intracellular distribution pattern of different nanoconjugates used in this study was different for different nanoconjugate surface molecules. Cells exposed to DOPAC covered nanoconjugates showed the smallest nanoconjugate uptake, with the most prominent pattern of large intracellular aggregates. Interestingly, cells treated with this nanoconjugate also showed the most pronounced radiosensitization effect in combination with the external beam x-ray irradiation. Further studies are necessary to evaluate mechanistic basis for this increased radiosensitization effect. Preliminary studies with the nanoparticles carrying an EGF mimicking peptide showed that this approach to targeting could perhaps be combined with a different approach to radiosensitization – use of nanoconjugates in combination with the radioactive iodine. Much additional work will be necessary in order to evaluate possible benefits of targeted nanoconjugates carrying radionuclides.
Graphic abstract
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18
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Quek SJ, Sim YF, Lai B, Lim W, Hong CH. The effect of parenting styles on enforcement of oral health behaviours in children. Eur Arch Paediatr Dent 2021; 22:83-92. [PMID: 32418053 DOI: 10.1007/s40368-020-00537-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 05/03/2020] [Indexed: 01/13/2023]
Abstract
PURPOSE To examine the relationship between parenting styles and parental attitudes towards oral health practices in children. METHODS Parents of children aged 4-6 years presenting to four public dental clinics completed the Parenting Styles Dimensions Questionnaire (PSDQ) and a questionnaire on parental attitudes, child diet and oral hygiene practices. Child oral health was evaluated using Plaque Index (PI) and dmft-Index. RESULTS Three hundred and eighty-nine children (mean age: 62.3 ± 9.8 months) were recruited. The median dmft was 4 (IQR = 9) and median PI was 1.5 (IQR = 0.8). An authoritative parenting style was observed in 95.1% of parents. Authoritative parents were more likely to monitor sweets/snacks intake (P = 0.004) and less inclined to offer sweets/snacks in exchange for good behaviour (P = 0.04) than permissive parents. However, actual between-meal snacking frequency did not differ between styles (P = 0.43). Permissive parents were less likely to ensure bedtime toothbrushing (P = 0.001) or brush thoroughly when busy or tired (P = 0.03) compared to authoritative parents; these attitudes were associated with higher frequencies of actual omission of bedtime toothbrushing (P = 0.006) in their children. A higher frequency of omitting bedtime toothbrushing significantly predicted a permissive parenting style (OR = 12.1, P = 0.009). Parenting styles were not associated with dmft (P = 0.72) and/or PI (P = 0.34). CONCLUSIONS Authoritative parenting was associated with positive attitudes regarding both preventive dietary and oral hygiene practices. Actual oral hygiene practices were more ideal in children with authoritative parents, but parenting styles had no impact on actual dietary habits.
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Affiliation(s)
- S J Quek
- Department of Restorative Dentistry (Paediatric Dentistry), National Dental Centre Singapore, 5 Second Hospital Avenue, Singapore, 168938, Singapore.
| | - Y F Sim
- Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Level 10, Singapore, 119085, Singapore
| | - B Lai
- Department of Restorative Dentistry (Paediatric Dentistry), National Dental Centre Singapore, 5 Second Hospital Avenue, Singapore, 168938, Singapore
| | - W Lim
- Youth Preventive Services Division, School Dental Services & School Dental Centre, Health Promotion Board, 3 Second Hospital Avenue, #04-00, Singapore, 168937, Singapore
| | - C H Hong
- Discipline of Orthodontics and Paediatric Dentistry, Faculty of Dentistry, National University of Singapore, 9 Lower Kent Ridge Road, Level 10, Singapore, 119085, Singapore
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19
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Capper MS, Enriquez Garcia A, Lai B, Wang BO, Gelfand BS, Shemanko CS, Jalilehvand F. The effect of sodium thiosulfate on cytotoxicity of a diimine Re(I) tricarbonyl complex. Dalton Trans 2021; 50:5968-5977. [PMID: 33949526 DOI: 10.1039/d1dt00517k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, diimine Re(i) tricarbonyl complexes have attracted great interest due to their promising cytotoxic effects. Here, we compare the cytotoxicity and cellular uptake of two Re(i) compounds fac-[(Re(CO)3(bpy)(H2O)](CF3SO3) (1) and Na(fac-[(Re(CO)3(bpy)(S2O3)])·H2O (bpy = 2,2'-bipyridine) (2). The Re-thiosulfate complex in 2 was characterized in two solvated crystal structures {Na(fac-[Re(CO)3(bpy)(S2O3)])·1.75H2O·C2H5OH}4 (2 + 0.75H2O + C2H5OH)4 and (fac-[Re(CO)3(bpy)(H2O)]) (fac-[Re(CO)3(bpy)(S2O3)])·4H2O (3). The cytotoxicity of 1 and 2 was tested in the MDA-MB-231 breast cancer cell line and compared with that of cisplatin. The cellular localization of the Re(i) complexes was investigated using synchrotron-based X-ray fluorescence microscopy (XFM). The results show that replacement of the aqua ligand with thiosulfate renders the complex less toxic most likely by distrupting its cellular entry. Therefore, thiosulfate could potentially have a similar chemoprotective effect against diimine fac-Re(CO)3 complexes as it has against cisplatin.
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Affiliation(s)
- Miles S Capper
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | | | - Barry Lai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, USA
| | - Baiwen O Wang
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Carrie S Shemanko
- Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Farideh Jalilehvand
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
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Yao Y, Jiang Y, Klug J, Nashed Y, Roehrig C, Preissner C, Marin F, Wojcik M, Cossairt O, Cai Z, Vogt S, Lai B, Deng J. Broadband X-ray ptychography using multi-wavelength algorithm. J Synchrotron Radiat 2021; 28:309-317. [PMID: 33399582 PMCID: PMC7842233 DOI: 10.1107/s1600577520014708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 11/06/2020] [Indexed: 05/25/2023]
Abstract
Ptychography is a rapidly developing scanning microscopy which is able to view the internal structures of samples at a high resolution beyond the illumination size. The achieved spatial resolution is theoretically dose-limited. A broadband source can provide much higher flux compared with a monochromatic source; however, it conflicts with the necessary coherence requirements of this coherent diffraction imaging technique. In this paper, a multi-wavelength reconstruction algorithm has been developed to deal with the broad bandwidth in ptychography. Compared with the latest development of mixed-state reconstruction approach, this multi-wavelength approach is more accurate in the physical model, and also considers the spot size variation as a function of energy due to the chromatic focusing optics. Therefore, this method has been proved in both simulation and experiment to significantly improve the reconstruction when the source bandwidth, illumination size and scan step size increase. It is worth mentioning that the accurate and detailed information of the energy spectrum for the incident beam is not required in advance for the proposed method. Further, we combine multi-wavelength and mixed-state approaches to jointly solve temporal and spatial partial coherence in ptychography so that it can handle various disadvantageous experimental effects. The significant relaxation in coherence requirements by our approaches allows the use of high-flux broadband X-ray sources for high-efficient and high-resolution ptychographic imaging.
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Affiliation(s)
- Yudong Yao
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Yi Jiang
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Jeffrey Klug
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Youssef Nashed
- Mathematics and Computer Science Division, Argonne National Laboratory, IL 60439, USA
| | | | - Curt Preissner
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Fabricio Marin
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Michael Wojcik
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Oliver Cossairt
- Department of Electrical Engineering and Computer Science, Northwestern University, IL 60208, USA
| | - Zhonghou Cai
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
| | - Junjing Deng
- Advanced Photon Source, Argonne National Laboratory, IL 60439, USA
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21
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Summers KL, Dolgova NV, Gagnon KB, Sopasis GJ, James AK, Lai B, Sylvain NJ, Harris HH, Nichol HK, George GN, Pickering IJ. PBT2 acts through a different mechanism of action than other 8-hydroxyquinolines: an X-ray fluorescence imaging study. Metallomics 2020; 12:1979-1994. [PMID: 33169753 DOI: 10.1039/d0mt00222d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
8-Hydroxyquinolines (8HQs) comprise a family of metal-binding compounds that have been used or tested for use in numerous medicinal applications, including as treatments for bacterial infection, Alzheimer's disease, and cancer. Two key 8HQs, CQ (5-chloro-7-iodo-8-hydroxyquinoline) and PBT2 (2-(dimethylamino)methyl-5,7-dichloro-8-hydroxyquinoline), have drawn considerable interest and have been the focus of many studies investigating their in vivo properties. These drugs have been described as copper and zinc ionophores because they do not cause metal depletion, as would be expected for a chelation mechanism, but rather cellular accumulation of these ions. In studies of their anti-cancer properties, CQ has been proposed to elicit toxic intracellular copper accumulation and to trigger apoptotic cancer cell death through several possible pathways. In this study we used synchrotron X-ray fluorescence imaging, in combination with biochemical assays and light microscopy, to investigate 8HQ-induced alterations to metal ion homeostasis, as well as cytotoxicity and cell death. We used the bromine fluorescence from a bromine labelled CQ congener (5,7-dibromo-8-hydroxyquinoline; B2Q) to trace the intracellular localization of B2Q following treatment and found that B2Q crosses the cell membrane. We also found that 8HQ co-treatment with Cu(ii) results in significantly increased intracellular copper and significant cytotoxicity compared with 8HQ treatments alone. PBT2 was found to be more cytotoxic, but a weaker Cu(ii) ionophore than other 8HQs. Moreover, treatment of cells with copper in the presence of CQ or B2Q resulted in copper accumulation in the nuclei, while PBT2-guided copper was distributed near to the cell membrane. These results suggest that PBT2 may be acting through a different mechanism than that of other 8HQs to cause the observed cytotoxicity.
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Affiliation(s)
- Kelly L Summers
- Molecular and Environmental Sciences Group, Department of Geological Sciences, College of Arts and Science, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.
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Yao Y, Jiang Y, Klug JA, Wojcik M, Maxey ER, Sirica NS, Roehrig C, Cai Z, Vogt S, Lai B, Deng J. Multi-beam X-ray ptychography for high-throughput coherent diffraction imaging. Sci Rep 2020; 10:19550. [PMID: 33177558 PMCID: PMC7658249 DOI: 10.1038/s41598-020-76412-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/21/2020] [Indexed: 11/09/2022] Open
Abstract
X-ray ptychography is a rapidly developing coherent diffraction imaging technique that provides nanoscale resolution on extended field-of-view. However, the requirement of coherence and the scanning mechanism limit the throughput of ptychographic imaging. In this paper, we propose X-ray ptychography using multiple illuminations instead of single illumination in conventional ptychography. Multiple locations of the sample are simultaneously imaged by spatially separated X-ray beams, therefore, the obtained field-of-view in one scan can be enlarged by a factor equal to the number of illuminations. We have demonstrated this technique experimentally using two X-ray beams focused by a house-made Fresnel zone plate array. Two areas of the object and corresponding double illuminations were successfully reconstructed from diffraction patterns acquired in one scan, with image quality similar with those obtained by conventional single-beam ptychography in sequence. Multi-beam ptychography approach increases the imaging speed, providing an efficient way for high-resolution imaging of large extended specimens.
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Affiliation(s)
- Yudong Yao
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Yi Jiang
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Jeffrey A Klug
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Michael Wojcik
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Evan R Maxey
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Nicholas S Sirica
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Christian Roehrig
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Zhonghou Cai
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Junjing Deng
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA.
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23
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Wang T, Jin L, Hidalgo J, Chu W, Snaider JM, Deng S, Zhu T, Lai B, Prezhdo O, Correa-Baena JP, Huang L. Protecting hot carriers by tuning hybrid perovskite structures with alkali cations. Sci Adv 2020; 6:6/43/eabb1336. [PMID: 33097534 PMCID: PMC7608821 DOI: 10.1126/sciadv.abb1336] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 09/11/2020] [Indexed: 05/19/2023]
Abstract
Successful implementation of hot carrier solar cells requires preserving high carrier temperature as carriers migrate through the active layer. Here, we demonstrated that addition of alkali cations in hybrid organic-inorganic lead halide perovskites led to substantially elevated carrier temperature, reduced threshold for phonon bottleneck, and enhanced hot carrier transport. The synergetic effects from the Rb, Cs, and K cations result in ~900 K increase in the effective carrier temperature at a carrier density around 1018 cm-3 with an excitation 1.45 eV above the bandgap. In the doped thin films, the protected hot carriers migrate 100 s of nanometers longer than the undoped sample as imaged by ultrafast microscopy. We attributed these improvements to the relaxation of lattice strain and passivation of halide vacancies by alkali cations based on x-ray structural characterizations and first principles calculations.
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Affiliation(s)
- Ti Wang
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
- School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Linrui Jin
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Juanita Hidalgo
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Weibin Chu
- Departments of Chemistry and Physics and Astronomy, University of Southern California, Los Angeles, CA 90007, USA
| | - Jordan M Snaider
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Shibin Deng
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Tong Zhu
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
- Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, No. 5 Zhongguancun South Street, Beijing 100081, China
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 Cass Ave., Lemont, IL 60439, USA
| | - Oleg Prezhdo
- Departments of Chemistry and Physics and Astronomy, University of Southern California, Los Angeles, CA 90007, USA
| | - Juan-Pablo Correa-Baena
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Libai Huang
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA.
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24
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Yu J, Ren J, Chen G, Lai B. P-74 CYP1A2 functions as a tumor suppressor in hepatocellular carcinoma through targeting HGF/c-Met axis. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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25
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Woods JJ, Lovett J, Lai B, Harris HH, Wilson JJ. Redox Stability Controls the Cellular Uptake and Activity of Ruthenium‐Based Inhibitors of the Mitochondrial Calcium Uniporter (MCU). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000247] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Joshua J. Woods
- Department of Chemistry and Chemical Biology Cornell University Ithaca NY 14853 USA
- Robert F. Smith School for Chemical and Biomolecular Engineering Cornell University Ithaca NY 14853 USA
| | - James Lovett
- Department of Chemistry The University of Adelaide Adelaide SA 5005 Australia
| | - Barry Lai
- Advanced Photon Source X-ray Science Division Argonne National Laboratory Argonne IL 60439 USA
| | - Hugh H. Harris
- Department of Chemistry The University of Adelaide Adelaide SA 5005 Australia
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology Cornell University Ithaca NY 14853 USA
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26
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Woods JJ, Lovett J, Lai B, Harris HH, Wilson JJ. Redox Stability Controls the Cellular Uptake and Activity of Ruthenium‐Based Inhibitors of the Mitochondrial Calcium Uniporter (MCU). Angew Chem Int Ed Engl 2020; 59:6482-6491. [DOI: 10.1002/anie.202000247] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Joshua J. Woods
- Department of Chemistry and Chemical Biology Cornell University Ithaca NY 14853 USA
- Robert F. Smith School for Chemical and Biomolecular Engineering Cornell University Ithaca NY 14853 USA
| | - James Lovett
- Department of Chemistry The University of Adelaide Adelaide SA 5005 Australia
| | - Barry Lai
- Advanced Photon Source X-ray Science Division Argonne National Laboratory Argonne IL 60439 USA
| | - Hugh H. Harris
- Department of Chemistry The University of Adelaide Adelaide SA 5005 Australia
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology Cornell University Ithaca NY 14853 USA
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27
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Phung N, Félix R, Meggiolaro D, Al-Ashouri A, Sousa E Silva G, Hartmann C, Hidalgo J, Köbler H, Mosconi E, Lai B, Gunder R, Li M, Wang KL, Wang ZK, Nie K, Handick E, Wilks RG, Marquez JA, Rech B, Unold T, Correa-Baena JP, Albrecht S, De Angelis F, Bär M, Abate A. The Doping Mechanism of Halide Perovskite Unveiled by Alkaline Earth Metals. J Am Chem Soc 2020; 142:2364-2374. [PMID: 31917562 DOI: 10.1021/jacs.9b11637] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Halide perovskites are a strong candidate for the next generation of photovoltaics. Chemical doping of halide perovskites is an established strategy to prepare the highest efficiency and most stable perovskite-based solar cells. In this study, we unveil the doping mechanism of halide perovskites using a series of alkaline earth metals. We find that low doping levels enable the incorporation of the dopant within the perovskite lattice, whereas high doping concentrations induce surface segregation. The threshold from low to high doping regime correlates to the size of the doping element. We show that the low doping regime results in a more n-type material, while the high doping regime induces a less n-type doping character. Our work provides a comprehensive picture of the unique doping mechanism of halide perovskites, which differs from classical semiconductors. We proved the effectiveness of the low doping regime for the first time, demonstrating highly efficient methylammonium lead iodide based solar cells in both n-i-p and p-i-n architectures.
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Affiliation(s)
- Nga Phung
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Roberto Félix
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Daniele Meggiolaro
- Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO) , CNR-ISTM , Via Elce di Sotto 8 , 06123 Perugia , Italy.,D3-CompuNet , Istituto Italiano di Tecnologia , Via Morego 30 , 16163 Genova , Italy
| | - Amran Al-Ashouri
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Gabrielle Sousa E Silva
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Claudia Hartmann
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Juanita Hidalgo
- School of Materials Science and Engineering , Georgia Institute of Technology , North Avenue NW , Atlanta , Georgia 30332 , United States
| | - Hans Köbler
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Edoardo Mosconi
- Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO) , CNR-ISTM , Via Elce di Sotto 8 , 06123 Perugia , Italy.,D3-CompuNet , Istituto Italiano di Tecnologia , Via Morego 30 , 16163 Genova , Italy
| | - Barry Lai
- Advanced Photon Source , Argonne National Lab , 9700 Cass Avenue , Lemont , Illinois 60439 , United States
| | - Rene Gunder
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Meng Li
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany.,Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices , Soochow University , Suzhou 215123 , PR China.,Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , PR China
| | - Kai-Li Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices , Soochow University , Suzhou 215123 , PR China
| | - Zhao-Kui Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices , Soochow University , Suzhou 215123 , PR China
| | - Kaiqi Nie
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany.,Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices , Soochow University , Suzhou 215123 , PR China
| | - Evelyn Handick
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Regan G Wilks
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Jose A Marquez
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Bernd Rech
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany.,Faculty of Electrical Engineering and Computer Science , Technical University Berlin , Marchstraße 23 , 10587 Berlin , Germany
| | - Thomas Unold
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany
| | - Juan-Pablo Correa-Baena
- School of Materials Science and Engineering , Georgia Institute of Technology , North Avenue NW , Atlanta , Georgia 30332 , United States
| | - Steve Albrecht
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany.,Faculty of Electrical Engineering and Computer Science , Technical University Berlin , Marchstraße 23 , 10587 Berlin , Germany
| | - Filippo De Angelis
- Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO) , CNR-ISTM , Via Elce di Sotto 8 , 06123 Perugia , Italy.,D3-CompuNet , Istituto Italiano di Tecnologia , Via Morego 30 , 16163 Genova , Italy.,Department of Chemistry, Biology and Biotechnology , University of Perugia , Via Elce di Sotto 8 , 06123 Perugia , Italy
| | - Marcus Bär
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany.,Department of Chemistry and Pharmacy , Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerland Str. 3 , 91058 Erlangen , Germany.,Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (HI ERN) , Albert-Einstein-Str. 15 , 12489 Berlin , Germany
| | - Antonio Abate
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1 , 14109 Berlin , Germany.,Department of Chemical, Materials and Production Engineering , University of Naples Federico II , Piazzale Tecchio 80 , 80125 Fuorigrotta , Italy
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28
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Mathieu E, Bernard AS, Quévrain E, Zoumpoulaki M, Iriart S, Lung-Soong C, Lai B, Medjoubi K, Henry L, Nagarajan S, Poyer F, Scheitler A, Ivanović-Burmazović I, Marco S, Somogyi A, Seksik P, Delsuc N, Policar C. Intracellular location matters: rationalization of the anti-inflammatory activity of a manganese(ii) superoxide dismutase mimic complex. Chem Commun (Camb) 2020; 56:7885-7888. [DOI: 10.1039/d0cc03398g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The study of Mn-based superoxide dismutase mimic conjugated with a multimodal Re-probe in a cellular model of oxidative stress revealed that its bioactivity is associated with its accumulation at the mitochondria.
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29
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LeTourneau MK, Marshall MJ, Grant M, Freeze PM, Strawn DG, Lai B, Dohnalkova AC, Harsh JB, Weller DM, Thomashow LS. Phenazine-1-Carboxylic Acid-Producing Bacteria Enhance the Reactivity of Iron Minerals in Dryland and Irrigated Wheat Rhizospheres. Environ Sci Technol 2019; 53:14273-14284. [PMID: 31751506 DOI: 10.1021/acs.est.9b03962] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phenazine-1-carboxylic acid (PCA) is a broad-spectrum antibiotic produced by rhizobacteria in the dryland wheat fields of the Columbia Plateau. PCA and other phenazines reductively dissolve Fe and Mn oxyhydroxides in bacterial culture systems, but the impact of PCA upon Fe and Mn cycling in the rhizosphere is unknown. Here, concentrations of dithionite-extractable and poorly crystalline Fe were approximately 10% and 30-40% higher, respectively, in dryland and irrigated rhizospheres inoculated with the PCA-producing (PCA+) strain Pseudomonas synxantha 2-79 than in rhizospheres inoculated with a PCA-deficient mutant. However, rhizosphere concentrations of Fe(II) and Mn did not differ significantly, indicating that PCA-mediated redox transformations of Fe and Mn were transient or were masked by competing processes. Total Fe and Mn uptake into wheat biomass also did not differ significantly, but the PCA+ strain significantly altered Fe translocation into shoots. X-ray absorption near edge spectroscopy revealed an abundance of Fe-bearing oxyhydroxides and phyllosilicates in all rhizospheres. These results indicate that the PCA+ strain enhanced the reactivity and mobility of Fe derived from soil minerals without producing parallel changes in plant Fe uptake. This is the first report that directly links significant alterations of Fe-bearing minerals in the rhizosphere to a single bacterial trait.
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Affiliation(s)
- Melissa K LeTourneau
- Department of Crop & Soil Sciences , Washington State University , Pullman , Washington 99164-6420 , United States
- United State Department of Agriculture - Agricultural Research Service , Wheat Health, Genetics and Quality Research Unit , Pullman , Washington 99164-6430 , United States
| | - Matthew J Marshall
- Earth & Biological Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Michael Grant
- Department of Crop & Soil Sciences , Washington State University , Pullman , Washington 99164-6420 , United States
| | - Patrick M Freeze
- Department of Crop & Soil Sciences , Washington State University , Pullman , Washington 99164-6420 , United States
| | - Daniel G Strawn
- Department of Soil and Water Systems , University of Idaho , Moscow , Idaho 83844-2340 , United States
| | - Barry Lai
- Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Alice C Dohnalkova
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - James B Harsh
- Department of Crop & Soil Sciences , Washington State University , Pullman , Washington 99164-6420 , United States
| | - David M Weller
- United State Department of Agriculture - Agricultural Research Service , Wheat Health, Genetics and Quality Research Unit , Pullman , Washington 99164-6430 , United States
| | - Linda S Thomashow
- United State Department of Agriculture - Agricultural Research Service , Wheat Health, Genetics and Quality Research Unit , Pullman , Washington 99164-6430 , United States
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30
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Lai B, Singh SC, Bindra J, Saraj C, Shukla A, Yadav T, Wu W, McGill S, Dalal N, Srivastava A, Guo C. Hydrogen evolution reaction from bare and surface-functionalized few-layered MoS 2 nanosheets in acidic and alkaline electrolytes. Mater Today Chem 2019; 14:100207. [PMID: 31903442 PMCID: PMC6936932 DOI: 10.1016/j.mtchem.2019.100207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/04/2019] [Accepted: 10/06/2019] [Indexed: 06/01/2023]
Abstract
Hydrogen is considered as an ideal and sustainable energy carrier because of its high energy density and carbon-free combustion. Electrochemical water splitting is the only solution for uninterrupted, scalable, and sustainable production of hydrogen without carbon emission. However, a large-scale hydrogen production through electrochemical water splitting depends on the availability of earth-abundant electrocatalysts and a suitable electrolyte medium. In this article, we demonstrate that hydrogen evolution reaction (HER) performance of electrocatalytic materials can be controlled by their surface functionalization and selection of a suitable electrolyte solution. Here, we report syntheses of few-layered MoS2 nanosheets, NiO nanoparticles (NPs), and multiwalled carbon nanotubes (MWCNTs) using scalable production methods from earth-abundant materials. Magnetic measurements of as-produced electrocatalyst materials demonstrate that MoS2 nanoflakes are diamagnetic, whereas surface-functionalized MoS2 and its composite with carbon nanotubes have strong ferromagnetism. The HER performance of the few-layered pristine MoS2 nanoflakes, MoS2/NiO NPs, and MoS2/NiO NPs/MWCNT nanocomposite electrocatalysts are studied in acidic and alkaline media. For bare MoS2, the values of overpotential (η10) in alkaline and acidic media are 0.45 and 0.54 V, respectively. Similarly, the values of current density at 0.5 V overpotential are 27 and 6.2 mA/cm2 in alkaline and acidic media, respectively. The surface functionalization acts adversely in the both alkaline and acidic media. MoS2 nanosheets functionalized with NiO NPs also demonstrated excellent performance for oxygen evolution reaction with anodic current of ~60 mA/cm2 and Tafel slope of 78 mVdec-1 in alkaline medium.
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Affiliation(s)
- B. Lai
- The Institute of Optics, University of Rochester, Rochester, NY, 14627, USA
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - Subhash C. Singh
- The Institute of Optics, University of Rochester, Rochester, NY, 14627, USA
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - J.K. Bindra
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - C.S. Saraj
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - A. Shukla
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - T.P. Yadav
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 222005, India
| | - W. Wu
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
| | - S.A. McGill
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 30201, USA
| | - N.S. Dalal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Amit Srivastava
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
- Department of Physics, TDPG College, VBS Purvanchal University, Jaunpur, 222001, India
| | - Chunlei Guo
- The Institute of Optics, University of Rochester, Rochester, NY, 14627, USA
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
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31
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Poropatich K, Paunesku T, Zander A, Wray B, Schipma M, Dalal P, Agulnik M, Chen S, Lai B, Antipova O, Maxey E, Brown K, Wanzer MB, Gursel D, Fan H, Rademaker A, Woloschak GE, Mittal BB. Elemental Zn and its Binding Protein Zinc-α2-Glycoprotein are Elevated in HPV-Positive Oropharyngeal Squamous Cell Carcinoma. Sci Rep 2019; 9:16965. [PMID: 31740720 PMCID: PMC6861298 DOI: 10.1038/s41598-019-53268-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 10/27/2019] [Indexed: 12/20/2022] Open
Abstract
Human papillomavirus (HPV)-positive head and neck squamous cell carcinoma (HNSCC) is biologically distinct from HPV-negative HNSCC. Outside of HPV-status, few tumor-intrinsic variables have been identified that correlate to improved survival. As part of exploratory analysis into the trace elemental composition of oropharyngeal squamous cell carcinoma (OPSCC), we performed elemental quanitification by X-ray fluorescence microscopy (XFM) on a small cohort (n = 32) of patients with HPV-positive and -negative OPSCC and identified in HPV-positive cases increased zinc (Zn) concentrations in tumor tissue relative to normal tissue. Subsequent immunohistochemistry of six Zn-binding proteins—zinc-α2-glycoprotein (AZGP1), Lipocalin-1, Albumin, S100A7, S100A8 and S100A9—revealed that only AZGP1 expression significantly correlated to HPV-status (p < 0.001) and was also increased in tumor relative to normal tissue from HPV-positive OPSCC tumor samples. AZGP1 protein expression in our cohort significantly correlated to a prolonged recurrence-free survival (p = 0.029), similar to HNSCC cases from the TCGA (n = 499), where highest AZGP1 mRNA levels correlated to improved overall survival (p = 0.023). By showing for the first time that HPV-positive OPSCC patients have increased intratumoral Zn levels and AZGP1 expression, we identify possible positive prognostic biomarkers in HNSCC as well as possible mechanisms of increased sensitivity to chemoradiation in HPV-positive OPSCC.
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Affiliation(s)
- Kate Poropatich
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA. .,Robert H Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA. .,Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | - Tatjana Paunesku
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Alia Zander
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Brian Wray
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Matthew Schipma
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Prarthana Dalal
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Mark Agulnik
- Robert H Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Division of Hematology and Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Olga Antipova
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Evan Maxey
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Koshonna Brown
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Michael Beau Wanzer
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Demirkan Gursel
- Northwestern University Pathology Core Facility, Robert H Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Hanli Fan
- Northwestern University Pathology Core Facility, Robert H Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Alfred Rademaker
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Gayle E Woloschak
- Robert H Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Bharat B Mittal
- Robert H Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.,Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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Heuberger DM, Harankhedkar S, Morgan T, Wolint P, Calcagni M, Lai B, Fahrni CJ, Buschmann J. High-affinity Cu(I) chelator PSP-2 as potential anti-angiogenic agent. Sci Rep 2019; 9:14055. [PMID: 31575910 PMCID: PMC6773859 DOI: 10.1038/s41598-019-50494-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/13/2019] [Indexed: 02/07/2023] Open
Abstract
Copper is an essential trace metal that has been implicated in angiogenesis, the formation of new blood vessels. As tumor growth relies on establishing a functional capillary network for blood supply, copper chelation therapy may hold promise as an anti-cancer strategy by suppressing angiogenesis. To test the anti-angiogenic effect of PSP-2, a recently developed high affinity Cu(I) chelator with low zeptomolar dissociation constant, we utilized the endothelial cancer cell line EAhy926 and assessed changes in cell migration, proliferation, and tube formation in Matrigel. In addition, sprouting was assessed by the chicken and sheep aortic ring assay, and vascular pattern formation was studied in the chorioallantoic membrane of chicken embryos (CAM assay). While incubation with PSP-2 resulted in selective depletion of cellular copper levels, cell migration was not affected and the proliferating activity was even slightly increased. Moreover, the endothelial tube formation assay revealed significant morphological changes in the presence of PSP-2, with thicker tubular walls and an overall decreased meshes area. Similarly, the aortic ring assay and CAM assay showed that PSP-2 evokes significantly longer sprouts with smaller angles at branching points. Altogether, PSP-2 exhibits significant bioactivity at concentrations as low as 5 μM, rendering it a promising anti-angiogenic agent. As EAhy926 cells exhibit both endothelial and tumorigenic properties, the anti-angiogenic effect of PSP-2 might potentially translate also into anti-cancer activity.
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Affiliation(s)
- Dorothea M Heuberger
- Institute of Intensive Care Medicine, University Hospital Zurich, Sternwartstrasse 14, 8091, Zurich, Switzerland
| | - Shefali Harankhedkar
- School of Chemistry and Biochemistry and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332-0400, USA
| | - Thomas Morgan
- School of Chemistry and Biochemistry and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332-0400, USA
| | - Petra Wolint
- Division of Plastic Surgery and Hand Surgery, University Hospital Zurich, Sternwartstrasse 14, 8091, Zurich, Switzerland
| | - Maurizio Calcagni
- Division of Plastic Surgery and Hand Surgery, University Hospital Zurich, Sternwartstrasse 14, 8091, Zurich, Switzerland
| | - Barry Lai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Christoph J Fahrni
- School of Chemistry and Biochemistry and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332-0400, USA.
| | - Johanna Buschmann
- Division of Plastic Surgery and Hand Surgery, University Hospital Zurich, Sternwartstrasse 14, 8091, Zurich, Switzerland.
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33
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Pan SY, Lai B, Ren Y. Mechanistic insight into mineral carbonation and utilization in cement-based materials at solid-liquid interfaces. RSC Adv 2019; 9:31052-31061. [PMID: 35529403 PMCID: PMC9072294 DOI: 10.1039/c9ra06118e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 09/25/2019] [Indexed: 11/24/2022] Open
Abstract
In order to ensure the viability of CO2 mineralization and utilization using alkaline solid waste, a mechanistic understanding of reactions at mineral–water interfaces was required to control the reaction pathways and kinetics. In this study, we provided new information for understanding the reactions of CO2 mineralization and utilization at mineral–water interfaces. Here we have carried out high-energy synchrotron X-ray analyses to characterize the changes of mineral phases in petroleum coke fly ash during CO2 mineralization and their subsequent utilization as supplementary cementitious materials in cement mortars. The 2-D synchrotron patterns were converted to 1-D diffraction patterns and the results were then interpreted via the Rietveld refinement. The results indicated that there was a continuous source of calcium ions mainly due to the dissolution of CaO and Ca(OH)2 in fly ash. This would actually enhance the driving force of saturation index at the solid–fluid interfacial layer, and then could eventually result in the nucleation and growth of calcium carbonate (calcite) at the interface. A small quantity of CaSO4 (anhydrite) in fly ash was also dissolved and simultaneously converted into calcite. In addition, the calcium sulfate in fly ash would effectively prevent the early hydration of tricalcium aluminate in blended cement, and thus could avoid the negative impact on its strength development. The proposed reaction mechanisms were also qualitatively verified by X-ray fluorescence mapping and electron microscopy. These results would help to design efficient reactors and cost-effective processes for CO2 mineralization and utilization in the future. Synchrotron-based X-ray analyses for understanding the reactions at mineral–water interfaces for CO2 mineralization and utilization using petroleum coke fly ash.![]()
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Affiliation(s)
- Shu-Yuan Pan
- Department of Bioenvironmental Systems Engineering, National Taiwan University Taipei City 10617 Taiwan
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory Argonne IL 60439 USA
| | - Yang Ren
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory Argonne IL 60439 USA
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34
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Deng J, Preissner C, Klug JA, Mashrafi S, Roehrig C, Jiang Y, Yao Y, Wojcik M, Wyman MD, Vine D, Yue K, Chen S, Mooney T, Wang M, Feng Z, Jin D, Cai Z, Lai B, Vogt S. The Velociprobe: An ultrafast hard X-ray nanoprobe for high-resolution ptychographic imaging. Rev Sci Instrum 2019; 90:083701. [PMID: 31472643 DOI: 10.1063/1.5103173] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Motivated by the advanced photon source upgrade, a new hard X-ray microscope called "Velociprobe" has been recently designed and built for fast ptychographic imaging with high spatial resolution. We are addressing the challenges of high-resolution and fast scanning with novel hardware designs, advanced motion controls, and new data acquisition strategies, including the use of high-bandwidth interferometric measurements. The use of granite, air-bearing-supported stages provides the necessary long travel ranges for coarse motion to accommodate real samples and variable energy operation while remaining highly stable during fine scanning. Scanning the low-mass zone plate enables high-speed and high-precision motion of the probe over the sample. With an advanced control algorithm implemented in a closed-loop feedback system, the setup achieves a position resolution (3σ) of 2 nm. The instrument performance is evaluated by 2D fly-scan ptychography with our developed data acquisition strategies. A spatial resolution of 8.8 nm has been demonstrated on a Au test sample with a detector continuous frame rate of 200 Hz. Using a higher flux X-ray source provided by double-multilayer monochromator, we achieve 10 nm resolution for an integrated circuit sample in an ultrafast scan with a detector's full continuous frame rate of 3000 Hz (0.33 ms per exposure), resulting in an outstanding imaging rate of 9 × 104 resolution elements per second.
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Affiliation(s)
- Junjing Deng
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Curt Preissner
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Jeffrey A Klug
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Sheikh Mashrafi
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Christian Roehrig
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Yi Jiang
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Yudong Yao
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Michael Wojcik
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Max D Wyman
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - David Vine
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Ke Yue
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Si Chen
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Tim Mooney
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Maoyu Wang
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, USA
| | - Zhenxing Feng
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, USA
| | - Dafei Jin
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Zhonghou Cai
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
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Ma H, Lai B, Dong S, Lv Y, Wang S, Jin X, Pan Z. Effect of dexmedetomidine on postoperative cognitive function in elderly patients undergoing anesthesia with controlled hypotension for endoscopic sinus surgery. J BIOL REG HOMEOS AG 2019; 33:1143-1148. [PMID: 31317698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- H Ma
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - B Lai
- Department of Intensive Care of Unit, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - S Dong
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Y Lv
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - S Wang
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - X Jin
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
| | - Z Pan
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin, China
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36
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Griffith EK, Ingall ED, Morton PL, Tavakoli DA, Lai B. Zinc K-edge XANES spectroscopy of mineral and organic standards. J Synchrotron Radiat 2019; 26:1302-1309. [PMID: 31274458 PMCID: PMC6613124 DOI: 10.1107/s160057751900540x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/19/2019] [Indexed: 05/18/2023]
Abstract
Zinc K-edge X-ray absorption near-edge (XANES) spectroscopy was conducted on 40 zinc mineral samples and organic compounds. The K-edge position varied from 9660.5 to 9666.0 eV and a variety of distinctive peaks at higher post-edge energies were exhibited by the materials. Zinc is in the +2 oxidation state in all analyzed materials, thus the variations in edge position and post-edge features reflect changes in zinc coordination. For some minerals, multiple specimens from different localities as well as pure forms from chemical supply companies were examined. These specimens had nearly identical K-edge and post-edge peak positions with only minor variation in the intensity of the post-edge peaks. This suggests that typical compositional variations in natural materials do not strongly affect spectral characteristics. Organic zinc compounds also exhibited a range of edge positions and post-edge features; however, organic compounds with similar zinc coordination structures had nearly identical spectra. Zinc XANES spectral patterns will allow identification of unknown zinc-containing minerals and organic phases in future studies.
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Affiliation(s)
- Erin K. Griffith
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Dr NW, Atlanta, GA 30332-0340, USA
| | - Ellery D. Ingall
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Dr NW, Atlanta, GA 30332-0340, USA
| | - Peter L. Morton
- Geochemistry, National High Magnetic Field Laboratory, 1800 E Paul Dirac Dr, Tallahassee, FL 32310, USA
| | - David A. Tavakoli
- Materials Characterization Facility, Georgia Institute of Technology, 345 Ferst Dr NW, Atlanta, GA 30332-1000, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA
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37
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Popović J, Klajn A, Paunesku T, Ma Q, Chen S, Lai B, Stevanović M, Woloschak GE. Neuroprotective Role of Selected Antioxidant Agents in Preventing Cisplatin-Induced Damage of Human Neurons In Vitro. Cell Mol Neurobiol 2019; 39:619-636. [PMID: 30874981 PMCID: PMC6535150 DOI: 10.1007/s10571-019-00667-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 02/28/2019] [Indexed: 12/17/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a side effect of platinum-based chemotherapy and decreases the quality of life of cancer patients. We compared neuroprotective properties of several agents using an in vitro model of terminally differentiated human cells NT2-N derived from cell line NT2/D1. Sodium azide and an active metabolite of amifostine (WR1065) increase cell viability in simultaneous treatment with cisplatin. In addition, WR1065 protects the non-dividing neurons by decreasing cisplatin caused oxidative stress and apoptosis. Accumulation of Pt in cisplatin-treated cells was heterogeneous, but the frequency and concentration of Pt in cells were lowered in the presence of WR1065 as shown by X-ray fluorescence microscopy (XFM). Transition metals accumulation accompanied Pt increase in cells; this effect was equally diminished in the presence of WR1065. To analyze possible chemical modulation of Pt-DNA bonds, we examined the platinum LIII near edge spectrum by X-ray absorption spectroscopy. The spectrum found in cisplatin-DNA samples is altered differently by the addition of either WR1065 or sodium azide. Importantly, a similar change in Pt edge spectra was noted in cells treated with cisplatin and WR1065. Therefore, amifostine should be reconsidered as a candidate for treatments that reduce or prevent CIPN.
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Affiliation(s)
- Jelena Popović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA
| | - Andrijana Klajn
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia
| | - Tatjana Paunesku
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA
| | - Qing Ma
- DND CAT, Northwestern Synchrotron Research Center at the Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Milena Stevanović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia.
- Faculty of Biology, University of Belgrade, Belgrade, 11000, Serbia.
- Serbian Academy of Sciences and Arts, Belgrade, 11000, Serbia.
| | - Gayle E Woloschak
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA.
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38
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Zelinka SL, Jakes JE, Kirker GT, Passarini L, Hunt CG, Lai B, Antipova O, Li L, Vogt S. Copper distribution and oxidation states near corroded fasteners in treated wood. SN Appl Sci 2019. [DOI: 10.1007/s42452-019-0249-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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39
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Correa-Baena JP, Luo Y, Brenner TM, Snaider J, Sun S, Li X, Jensen MA, Hartono NTP, Nienhaus L, Wieghold S, Poindexter JR, Wang S, Meng YS, Wang T, Lai B, Holt MV, Cai Z, Bawendi MG, Huang L, Buonassisi T, Fenning DP. Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites. Science 2019; 363:627-631. [DOI: 10.1126/science.aah5065] [Citation(s) in RCA: 198] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 11/01/2018] [Accepted: 01/02/2019] [Indexed: 12/19/2022]
Abstract
The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano–x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide, for substoichiometric, stoichiometric, and overstoichiometric preparations, where the lead halide is varied with respect to organic halide precursors. Halide homogenization coincides with long-lived charge carrier decays, spatially homogeneous carrier dynamics (as visualized by ultrafast microscopy), and improved photovoltaic device performance. We found that rubidium and potassium phase-segregate in highly concentrated clusters. Alkali metals are beneficial at low concentrations, where they homogenize the halide distribution, but at higher concentrations, they form recombination-active second-phase clusters.
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40
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Enriquez Garcia A, Lai B, Gopinathan SG, Harris HH, Shemanko CS, Jalilehvand F. Nuclear localization of dirhodium(ii) complexes in breast cancer cells by X-ray fluorescence microscopy. Chem Commun (Camb) 2019; 55:8223-8226. [DOI: 10.1039/c9cc00521h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
X-ray fluorescence microscopy confirms the necessity of vacant axial sites in dirhodium(ii) carboxylates for their cellular uptake and cytotoxicity.
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Affiliation(s)
| | - Barry Lai
- Advanced Photon Source
- X-ray Science Division
- Argonne National Laboratory
- Argonne
- USA
| | | | - Hugh H. Harris
- Department of Chemistry
- The University of Adelaide
- Australia
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41
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Dučić T, Stamenković S, Lai B, Andjus P, Lučić V. Multimodal Synchrotron Radiation Microscopy of Intact Astrocytes from the hSOD1 G93A Rat Model of Amyotrophic Lateral Sclerosis. Anal Chem 2018; 91:1460-1471. [DOI: 10.1021/acs.analchem.8b04273] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tanja Dučić
- CELLS − ALBA, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain
| | - Stefan Stamenković
- Faculty of Biology, University of Belgrade, Center for Laser Microscopy−CLM, Studentski Trg 3, 11000 Belgrade, Serbia
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Pavle Andjus
- Faculty of Biology, University of Belgrade, Center for Laser Microscopy−CLM, Studentski Trg 3, 11000 Belgrade, Serbia
| | - Vladan Lučić
- Max Planck Institute of Biochemistry, Am Klopferspitz 1, 82152, Martinsried, Germany
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42
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Dučić T, Paunesku T, Chen S, Ninković M, Speling S, Wilke C, Lai B, Woloschak G. Structural and elemental changes in glioblastoma cells in situ: complementary imaging with high resolution visible light- and X-ray microscopy. Analyst 2018; 142:356-365. [PMID: 27981320 DOI: 10.1039/c6an02532c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The glioblastoma (GBM) is characterized by a short median survival and an almost 100% tumor related mortality. GBM cells exhibit highly invasive behavior whose mechanisms are not yet fully understood. The present study explores application of X-ray and visible light microscopy to display the elemental and structural images of cells from 3 patient derived GMB samples and an established GMB cell line. Slight differences in elemental concentrations, in actin cytoskeleton organization and cell morphology were noted between all cells types by X-ray fluorescence and full field soft X-ray microscopy, as well as the Structured Illumination Super-resolution Microscope (SIM). Different sample preparation approaches were used to match each imaging technique. While preparation for SIM included cell fixation and staining, intact frozen hydrated cells were used for the trace element imaging by hard X-ray fluorescence and exploration of the structural features by soft X-ray absorption tomography. Each technique documented differences between samples with regard to morphology and elemental composition and underscored the importance of use of multiple patient derived samples for detailed GBM study.
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Affiliation(s)
- Tanja Dučić
- CELLS - ALBA, Carrer de la Llum 2-26, 08290 Cerdanyola del Vallès, Barcelona, Spain.
| | - Tatjana Paunesku
- Department of Radiation Oncology, Northwestern University, 300 E. Superior St, Chicago, IL 60611, USA
| | - Si Chen
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA
| | - Milena Ninković
- Department of Neurosurgery, Georg-August University Medical Centre, 37075 Göttingen, Germany
| | - Swetlana Speling
- Department of Neurosurgery, Georg-August University Medical Centre, 37075 Göttingen, Germany
| | - Charlene Wilke
- Northwestern University, Biological Imaging Facility, 2205 Tech Drive, Evanston, IL 60208, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA
| | - Gayle Woloschak
- Department of Radiation Oncology, Northwestern University, 300 E. Superior St, Chicago, IL 60611, USA
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43
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Liu H, Dong Y, Cherukara MJ, Sasikumar K, Narayanan B, Cai Z, Lai B, Stan L, Hong S, Chan MKY, Sankaranarayanan SKRS, Zhou H, Fong DD. Quantitative Observation of Threshold Defect Behavior in Memristive Devices with Operando X-ray Microscopy. ACS Nano 2018; 12:4938-4945. [PMID: 29715007 DOI: 10.1021/acsnano.8b02028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Memristive devices are an emerging technology that enables both rich interdisciplinary science and novel device functionalities, such as nonvolatile memories and nanoionics-based synaptic electronics. Recent work has shown that the reproducibility and variability of the devices depend sensitively on the defect structures created during electroforming as well as their continued evolution under dynamic electric fields. However, a fundamental principle guiding the material design of defect structures is still lacking due to the difficulty in understanding dynamic defect behavior under different resistance states. Here, we unravel the existence of threshold behavior by studying model, single-crystal devices: resistive switching requires that the pristine oxygen vacancy concentration reside near a critical value. Theoretical calculations show that the threshold oxygen vacancy concentration lies at the boundary for both electronic and atomic phase transitions. Through operando, multimodal X-ray imaging, we show that field tuning of the local oxygen vacancy concentration below or above the threshold value is responsible for switching between different electrical states. These results provide a general strategy for designing functional defect structures around threshold concentrations to create dynamic, field-controlled phases for memristive devices.
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Affiliation(s)
- Huajun Liu
- Materials Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
- Institute of Materials Research and Engineering , A*STAR (Agency for Science, Technology and Research) , Singapore 138634 , Singapore
| | - Yongqi Dong
- Materials Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
- National Synchrotron Radiation Laboratory , University of Science and Technology of China , Hefei , Anhui 230026 , China
| | - Mathew J Cherukara
- X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Kiran Sasikumar
- Center for Nanoscale Materials, Nanoscience and Technology Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Badri Narayanan
- Center for Nanoscale Materials, Nanoscience and Technology Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Zhonghou Cai
- X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Liliana Stan
- Center for Nanoscale Materials, Nanoscience and Technology Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Seungbum Hong
- Materials Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
- Department of Materials Science and Engineering, KAIST , Daejeon 34141 , Korea
| | - Maria K Y Chan
- Center for Nanoscale Materials, Nanoscience and Technology Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Subramanian K R S Sankaranarayanan
- Center for Nanoscale Materials, Nanoscience and Technology Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Hua Zhou
- X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Dillon D Fong
- Materials Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
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44
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Wedding JL, Lai B, Vogt S, Harris HH. Investigation into the intracellular fates, speciation and mode of action of selenium-containing neuroprotective agents using XAS and XFM. Biochim Biophys Acta Gen Subj 2018; 1862:2393-2404. [PMID: 29631056 DOI: 10.1016/j.bbagen.2018.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/29/2018] [Accepted: 03/29/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND A variety of selenium compounds have been observed to provide protection against oxidative stress, presumably by mimicking the mechanism of action of the glutathione peroxidases. However, the selenium chemistry that underpins the action of these compounds has not been unequivocally established. METHODS The synchrotron based techniques, X-ray absorption spectroscopy and X-ray fluorescence microscopy were used to examine the cellular speciation and distribution of selenium in SH-SY5Y cells pretreated with one of two diphenyl diselenides, or ebselen, followed by peroxide insult. RESULTS Bis(2-aminophenyl)diselenide was shown to protect against oxidative stress conditions which mimic ischemic strokes, while its nitro analogue, bis(2-nitrophenyl)diselenide did not. This protective activity was tentatively assigned to the reductive cleavage of bis(2-aminophenyl)diselenide inside human neurocarcinoma cells, SH-SY5Y, while bis(2-nitrophenyl)diselenide remained largely unchanged. The distinct chemistries of the related compounds were traced by the changes in selenium speciation in bulk pellets of treated SH-SY5Y cells detected by X-ray absorption spectroscopy. Further, bis(2-aminophenyl)diselenide, like the known stroke mitigation agent ebselen, was observed by X-ray fluorescence imaging to penetrate into the nucleus of SH-SY5Y cells while bis(2-nitrophenyl)diselenide was observed to be excluded from the nuclear region. CONCLUSIONS The differences in activity were thus attributed to the varied speciation and cellular localisation of the compounds, or their metabolites, as detected by X-ray absorption spectroscopy and X-ray fluorescence microscopy. SIGNIFICANCE The work is significant as it links, for the first time, the protective action of selenium compounds against redox stress with particular chemical speciation using a direct measurement approach.
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Affiliation(s)
- Jason L Wedding
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia
| | - Barry Lai
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Hugh H Harris
- Department of Chemistry, The University of Adelaide, South Australia 5005, Australia.
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Abstract
The quantification of X-ray fluorescence (XRF) microscopy maps by fitting the raw spectra to a known standard is crucial for evaluating chemical composition and elemental distribution within a material. Synchrotron-based XRF has become an integral characterization technique for a variety of research topics, particularly due to its non-destructive nature and its high sensitivity. Today, synchrotrons can acquire fluorescence data at spatial resolutions well below a micron, allowing for the evaluation of compositional variations at the nanoscale. Through proper quantification, it is then possible to obtain an in-depth, high-resolution understanding of elemental segregation, stoichiometric relationships, and clustering behavior. This article explains how to use the MAPS fitting software developed by Argonne National Laboratory for the quantification of full 2-D XRF maps. We use as an example results from a Cu(In,Ga)Se2 solar cell, taken at the Advanced Photon Source beamline 2-ID-D at Argonne National Laboratory. We show the standard procedure for fitting raw data, demonstrate how to evaluate the quality of a fit and present the typical outputs generated by the program. In addition, we discuss in this manuscript certain software limitations and offer suggestions for how to further correct the data to be numerically accurate and representative of spatially resolved, elemental concentrations.
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Affiliation(s)
- Tara Nietzold
- School for Engineering of Matter, Transport, and Energy, Arizona State University
| | - Bradley M West
- School of Electrical, Computer, and Energy Engineering, Arizona State University
| | | | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory
| | - Mariana I Bertoni
- School of Electrical, Computer, and Energy Engineering, Arizona State University;
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Brown K, Thurn T, Xin L, Liu W, Bazak R, Chen S, Lai B, Vogt S, Jacobsen C, Paunesku T, Woloschak GE. Intracellular in situ labeling of TiO 2 nanoparticles for fluorescence microscopy detection. Nano Res 2018; 11:464-476. [PMID: 29541425 PMCID: PMC5846489 DOI: 10.1007/s12274-017-1654-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Titanium dioxide (TiO2) nanoparticles are produced for many different purposes, including development of therapeutic and diagnostic nanoparticles for cancer detection and treatment, drug delivery, induction of DNA double-strand breaks, and imaging of specific cells and subcellular structures. Currently, the use of optical microscopy, an imaging technique most accessible to biology and medical pathology, to detect TiO2 nanoparticles in cells and tissues ex vivo is limited with low detection limits, while more sensitive imaging methods (transmission electron microscopy, X-ray fluorescence microscopy, etc.) have low throughput and technical and operational complications. Herein, we describe two in situ post-treatment labeling approaches to stain TiO2 nanoparticles taken up by the cells. The first approach utilizes fluorescent biotin and fluorescent streptavidin to label the nanoparticles before and after cellular uptake; the second approach is based on the copper-catalyzed azide-alkyne cycloaddition, the so-called Click chemistry, for labeling and detection of azide-conjugated TiO2 nanoparticles with alkyne-conjugated fluorescent dyes such as Alexa Fluor 488. To confirm that optical fluorescence signals of these nanoparticles match the distribution of the Ti element, we used synchrotron X-ray fluorescence microscopy (XFM) at the Advanced Photon Source at Argonne National Laboratory. Titanium-specific XFM showed excellent overlap with the location of optical fluorescence detected by confocal microscopy. Therefore, future experiments with TiO2 nanoparticles may safely rely on confocal microscopy after in situ nanoparticle labeling using approaches described here.
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Affiliation(s)
- Koshonna Brown
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Ted Thurn
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Lun Xin
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - William Liu
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Remon Bazak
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Stefan Vogt
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Chris Jacobsen
- Department of Physics & Astronomy, Weinberg College of Arts and Sciences, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Tatjana Paunesku
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Gayle E Woloschak
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
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Abstract
With metalloproteins garnering increased interest as therapeutic targets, designing target-specific metalloprotein inhibitors (MPi) is of substantial importance. However, in many respects, the development and evaluation of MPi lags behind that of conventional small molecule therapeutics. Core concerns around MPi, such as target selectivity and potential disruption of metal ion homeostasis linger. Herein, we used a suite of analytical methods, including energy-dispersive X-ray spectroscopy (EDX), inductively coupled plasma atomic emission spectroscopy (ICP-OES), and synchrotron X-ray fluorescence microscopy (SXRF) to investigate the effect of several MPi on cellular metal ion distribution and homeostasis. The results reveal that at therapeutically relevant concentrations, the tested MPi have no significant effects on cellular metal ion content or distribution. In addition, the affinity of the metal-binding pharmacophore (MBP) utilized by the MPi does not have a substantial influence on the effect of the MPi on cellular metal distribution. These studies provide an important, original data set indicating that metal ion homeostasis is not notably perturbed by MPi, which should encourage the development of and aid in designing new MPi, guide MBP selection, and clarify the effect of MPi on the 'metallome'.
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Affiliation(s)
- Yao Chen
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300350, China. and Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Zhenjie Zhang
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, 300350, China. and Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Seth M Cohen
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
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48
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Marshall CP, Olcott Marshall A, Aitken JB, Lai B, Vogt S, Breuer P, Steemans P, Lay PA. Imaging of Vanadium in Microfossils: A New Potential Biosignature. Astrobiology 2017; 17:1069-1076. [PMID: 28910135 DOI: 10.1089/ast.2017.1709] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The inability to unambiguously distinguish the biogenicity of microfossil-like structures in the ancient rock record is a fundamental predicament facing Archean paleobiologists and astrobiologists. Therefore, novel methods for discriminating biological from nonbiological chemistries of microfossil-like structures are of the utmost importance in the search for evidence of early life on Earth. This, too, is important for the search for life on Mars by in situ analyses via rovers or sample return missions for future analysis here on Earth. Here, we report the application of synchrotron X-ray fluorescence imaging of vanadium, within thermally altered organic-walled microfossils of bona fide biological origin. From our data, we demonstrate that vanadium is present within microfossils of undisputable biological origin. It is well known in the organic geochemistry literature that elements such as vanadium are enriched and contained within crude oils, asphalts, and black shales that have been formed by diagenesis of biological organic material. It has been demonstrated that the origin of vanadium is due to the diagenetic alteration of precursor chlorophyll and heme porphyrin pigment compounds from living organisms. We propose that, taken together, microfossil-like morphology, carbonaceous composition, and the presence of vanadium could be used in tandem as a biosignature to ascertain the biogenicity of putative microfossil-like structures. Key Words: Microfossils-Synchrotron micro-X-ray fluorescence-Vanadium-Tetrapyrrole-Biosignature. Astrobiology 17, 1069-1076.
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Affiliation(s)
- Craig P Marshall
- 1 Department of Geology, University of Kansas , Lawrence, Kansas, USA
- 2 Department of Chemistry, University of Kansas , Lawrence, Kansas, USA
| | | | - Jade B Aitken
- 3 School of Chemistry, The University of Sydney , Sydney, Australia
| | - Barry Lai
- 4 Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois, USA
| | - Stefan Vogt
- 4 Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois, USA
| | - Pierre Breuer
- 5 Geological Technical Services Division , Saudi Aramco, Dhahran, Saudi Arabia
| | - Philippe Steemans
- 6 Palaeobotany-Palaeopalynology-Micropalaeontology, University of Liège , Liège, Belgium
| | - Peter A Lay
- 3 School of Chemistry, The University of Sydney , Sydney, Australia
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49
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Luo Y, Khoram P, Brittman S, Zhu Z, Lai B, Ong SP, Garnett EC, Fenning DP. Direct Observation of Halide Migration and its Effect on the Photoluminescence of Methylammonium Lead Bromide Perovskite Single Crystals. Adv Mater 2017; 29:1703451. [PMID: 28961331 DOI: 10.1002/adma.201703451] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 07/24/2017] [Indexed: 05/21/2023]
Abstract
Optoelectronic devices based on hybrid perovskites have demonstrated outstanding performance within a few years of intense study. However, commercialization of these devices requires barriers to their development to be overcome, such as their chemical instability under operating conditions. To investigate this instability and its consequences, the electric field applied to single crystals of methylammonium lead bromide (CH3 NH3 PbBr3 ) is varied, and changes are mapped in both their elemental composition and photoluminescence. Synchrotron-based nanoprobe X-ray fluorescence (nano-XRF) with 250 nm resolution reveals quasi-reversible field-assisted halide migration, with corresponding changes in photoluminescence. It is observed that higher local bromide concentration is correlated to superior optoelectronic performance in CH3 NH3 PbBr3 . A lower limit on the electromigration rate is calculated from these experiments and the motion is interpreted as vacancy-mediated migration based on nudged elastic band density functional theory (DFT) simulations. The XRF mapping data provide direct evidence of field-assisted ionic migration in a model hybrid-perovskite thin single crystal, while the link with photoluminescence proves that the halide stoichiometry plays a key role in the optoelectronic properties of the perovskite.
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Affiliation(s)
- Yanqi Luo
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Parisa Khoram
- Center for Nanophotonics, AMOLF, Amsterdam, 1098 XG, The Netherlands
| | - Sarah Brittman
- Center for Nanophotonics, AMOLF, Amsterdam, 1098 XG, The Netherlands
| | - Zhuoying Zhu
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Shyue Ping Ong
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Erik C Garnett
- Center for Nanophotonics, AMOLF, Amsterdam, 1098 XG, The Netherlands
| | - David P Fenning
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
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50
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Woollacott A, Lai B, Nair P, Flood V. SUN-P294: Vitamin D Status of Hospitalised Patients Receiving Nutritional Support. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30337-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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