1
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Chang PS, Chen BH, Lin YC, Dai WT, Kumar G, Lin YG, Huang MH. Growth of Size-Tunable Ag 2O Polyhedra and Revelation of Their Bulk and Surface Lattices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401558. [PMID: 38829043 DOI: 10.1002/smll.202401558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/22/2024] [Indexed: 06/05/2024]
Abstract
By primarily adjusting the reagent amounts, particularly the volume of AgNO3 solution introduced, Ag2O cubes with decreasing sizes from 440 to 79 nm, octahedra from 714 to 106 nm, and rhombic dodecahedra from 644 to 168 nm are synthesized. 733 nm cuboctahedra are also prepared for structural analysis. With in-house X-ray diffraction (XRD) peak calibration, shape-related peak shifts are recognizable. Synchrotron XRD measurements at 100 K reveal the presence of bulk and surface layer lattices. Bulk cell constants also deviate slightly. They show a negative thermal expansion behavior with shrinking cell constants at higher temperatures. The Ag2O crystals exhibit size- and facet-dependent optical properties. Bandgaps red-shift continuously with increasing particle sizes. Optical facet effect is also observable. Moreover, synchrotron XRD peaks of a mixture of Cu2O rhombicuboctahedra and edge- and corner-truncated cubes exposing all three crystal faces can be deconvoluted into three components with the bulk and the [111] microstrain phase as the major component. Interestingly, while the unheated Cu2O sample shows clear diffraction peak asymmetry, annealing the sample to 450 K yields nearly symmetric peaks even when returning the sample to room temperature, meaning even moderately high temperatures can permanently change the crystal lattice.
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Affiliation(s)
- Pin-Shiuan Chang
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Bo-Hao Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu, 300092, Taiwan
| | - Yu-Chang Lin
- National Synchrotron Radiation Research Center, Hsinchu, 300092, Taiwan
| | - Wan-Ting Dai
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Gautam Kumar
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
| | - Yan-Gu Lin
- National Synchrotron Radiation Research Center, Hsinchu, 300092, Taiwan
| | - Michael H Huang
- Department of Chemistry, National Tsing Hua University, Hsinchu, 300044, Taiwan
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2
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Rafsanjani-Abbasi A, Buchner F, Lewis FJ, Puntscher L, Kraushofer F, Sombut P, Eder M, Pavelec J, Rheinfrank E, Franceschi G, Birschitzky V, Riva M, Franchini C, Schmid M, Diebold U, Meier M, Madsen GKH, Parkinson GS. Digging Its Own Site: Linear Coordination Stabilizes a Pt 1/Fe 2O 3 Single-Atom Catalyst. ACS NANO 2024; 18:26920-26927. [PMID: 39293063 PMCID: PMC11447906 DOI: 10.1021/acsnano.4c08781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/20/2024]
Abstract
Determining the local coordination of the active site is a prerequisite for the reliable modeling of single-atom catalysts (SACs). Obtaining such information is difficult on powder-based systems and much emphasis is placed on density functional theory computations based on idealized low-index surfaces of the support. In this work, we investigate how Pt atoms bind to the (11̅02) facet of α-Fe2O3; a common support material in SACs. Using a combination of scanning tunneling microscopy, X-ray photoelectron spectroscopy, and an extensive computational evolutionary search, we find that Pt atoms significantly reconfigure the support lattice to facilitate a pseudolinear coordination to surface oxygen atoms. Despite breaking three surface Fe-O bonds, this geometry is favored by 0.84 eV over the best configuration involving an unperturbed support. We suggest that the linear O-Pt-O configuration is common in reactive Pt-based SAC systems because it balances thermal stability with the ability to adsorb reactants from the gas phase. Moreover, we conclude that extensive structural searches are necessary to determine realistic active site geometries in single-atom catalysis.
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Affiliation(s)
| | - Florian Buchner
- Institute of Materials Chemistry, TU Wien, Vienna AT 1060, Austria
| | - Faith J Lewis
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Lena Puntscher
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | | | - Panukorn Sombut
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Moritz Eder
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Jiří Pavelec
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Erik Rheinfrank
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | | | - Viktor Birschitzky
- Faculty of Physics and Center for Computational Materials Science, University of Vienna, Vienna AT 1090, Austria
| | - Michele Riva
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Cesare Franchini
- Faculty of Physics and Center for Computational Materials Science, University of Vienna, Vienna AT 1090, Austria
- Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna IT 40126, Italy
| | - Michael Schmid
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Ulrike Diebold
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
| | - Matthias Meier
- Institute of Applied Physics, TU Wien, Vienna AT 1040, Austria
- Faculty of Physics and Center for Computational Materials Science, University of Vienna, Vienna AT 1090, Austria
| | - Georg K H Madsen
- Institute of Materials Chemistry, TU Wien, Vienna AT 1060, Austria
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3
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Masai H, Koshimizu M, Kawamoto H, Setoyama H, Onodera Y, Ikeda K, Maruyama S, Haruta N, Sato T, Matsumoto Y, Takahashi C, Mizoguchi T. Combinatorial characterization of metastable luminous silver cations. Sci Rep 2024; 14:4638. [PMID: 38409370 PMCID: PMC10897463 DOI: 10.1038/s41598-024-55014-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 02/19/2024] [Indexed: 02/28/2024] Open
Abstract
Thermodynamically metastable glasses that can contain metastable species are important functional materials. X-ray absorption near-edge structure (XANES) spectroscopy is an effective technique for determining the valence states of cations, especially for the doping element in phosphors. Herein, we first confirm the valence change of silver cations from monovalent to trivalent in aluminophosphate glasses by X-ray irradiation using a combination of Ag L3-edge XANES, electron spin resonance, and simulated XANES spectra based on first-principles calculations. The absorption edge of the experimental and simulated XANES spectra demonstrate the spectral features of Ag(III), confirming that AgO exists as Ag(I)Ag(III)O2. A part of Ag(I) changes to Ag(III) by X-ray irradiation, and the generation of Ag(III) is saturated after high irradiation doses, in good agreement with conventional radiophotoluminescence (RPL) behaviour. The structural modelling based on a combination of quantum beam analysis suggests that the local coordination of Ag cations is similar to that of Ag(III), which is confirmed by density functional theory calculations. This demonstration of Ag(III) in glass overturns the conventional understanding of the RPL mechanism of silver cations, redefining the science of silver-related materials.
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Affiliation(s)
- Hirokazu Masai
- Department of Materials and Chemistry, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka, 563-8577, Japan.
| | - Masanori Koshimizu
- Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka, 432-8011, Japan
| | - Hiroki Kawamoto
- Department of Applied Chemistry, Tohoku University, 6-6-07 Aoba, Sendai, Miyagi, 980-8579, Japan
| | - Hiroyuki Setoyama
- Kyushu Synchrotron Light Research Center (SAGA Light Source), 8-7 Yayoigaoka, Tosu, Saga, 841-0005, Japan
| | - Yohei Onodera
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2-1010 Asashiro-Nishi, Kumatori-Cho, Sennan-Gun, Osaka, 590-0494, Japan
- Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Kazutaka Ikeda
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 203-1 Shirakata, Tokai-Mura, Naka-Gun, Ibaraki, 319-1106, Japan
| | - Shingo Maruyama
- Department of Applied Chemistry, Tohoku University, 6-6-07 Aoba, Sendai, Miyagi, 980-8579, Japan
| | - Naoki Haruta
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-Cho 34-4, Sakyo-Ku, Kyoto, 606-8103, Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto, 615-8510, Japan
| | - Tohru Sato
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-Cho 34-4, Sakyo-Ku, Kyoto, 606-8103, Japan
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto, 615-8510, Japan
| | - Yuji Matsumoto
- Department of Applied Chemistry, Tohoku University, 6-6-07 Aoba, Sendai, Miyagi, 980-8579, Japan
| | - Chika Takahashi
- Department of Applied Chemistry, Tohoku University, 6-6-07 Aoba, Sendai, Miyagi, 980-8579, Japan
| | - Teruyasu Mizoguchi
- Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro, Tokyo, 153-8505, Japan
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4
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Stable single atomic silver wires assembling into a circuitry-connectable nanoarray. Nat Commun 2021; 12:1191. [PMID: 33608540 PMCID: PMC7895918 DOI: 10.1038/s41467-021-21462-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/27/2021] [Indexed: 11/16/2022] Open
Abstract
Atomic metal wires have great promise for practical applications in devices due to their unique electronic properties. Unfortunately, such atomic wires are extremely unstable. Here we fabricate stable atomic silver wires (ASWs) with appreciably unoccupied states inside the parallel tunnels of α-MnO2 nanorods. These unoccupied Ag 4d orbitals strengthen the Ag–Ag bonds, greatly enhancing the stability of ASWs while the presence of delocalized 5s electrons makes the ASWs conducting. These stable ASWs form a coherently oriented three-dimensional wire array of over 10 nm in width and up to 1 μm in length allowing us to connect it to nano-electrodes. Current-voltage characteristics of ASWs show a temperature-dependent insulator-to-metal transition, suggesting that the atomic wires could be used as thermal electrical devices. One-dimensional atomic metal wires can exhibit useful properties distinct from their bulk equivalents; however they typically suffer from limited stability. Here, Chen et al create atomic silver wires which are stable and exhibit a temperature dependent metal to insulator transition.
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5
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Ou CC, Chen CH, Chan TS, Chen CS, Cheng S. Influence of pretreatment on the catalytic performance of Ag/CeO2 for formaldehyde removal at low temperature. J Catal 2019. [DOI: 10.1016/j.jcat.2019.09.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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van der Linden M, van Bunningen AJ, Delgado-Jaime MU, Detlefs B, Glatzel P, Longo A, de Groot FMF. Insights into the Synthesis Mechanism of Ag 29 Nanoclusters. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2018; 122:28351-28361. [PMID: 30774744 PMCID: PMC6369667 DOI: 10.1021/acs.jpcc.8b09360] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 11/02/2018] [Indexed: 06/09/2023]
Abstract
The current understanding of the synthesis mechanisms of noble metal clusters is limited, in particular for Ag clusters. Here, we present a detailed investigation into the synthesis process of atomically monodisperse Ag29 clusters, prepared via reduction of AgNO3 in the presence of dithiolate ligands. Using optical spectroscopy, mass spectrometry, and X-ray spectroscopy, it was determined that the synthesis involves a rapid nucleation and growth to species with up to a few hundred Ag atoms. From these larger species, Ag29 clusters are formed and their concentration increases steadily over time. Oxygen plays an important role in the etching of large particles to Ag29. No other stable Ag cluster species are observed at any point during the synthesis.
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Affiliation(s)
- Marte van der Linden
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
- European
Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Arnoldus J. van Bunningen
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
| | - Mario U. Delgado-Jaime
- Department
of Chemistry, University of Guadalajara, Blvd. Marcelino Garcia Barragán
1421, 44430 Guadalajara, Mexico
| | - Blanka Detlefs
- European
Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Pieter Glatzel
- European
Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS 40220, 38043 Grenoble, France
| | - Alessandro Longo
- Netherlands
Organization for Scientific Research at ESRF, BP 220, 38043 Grenoble Cedex 9, France
- Istituto
per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, UOS Palermo, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Frank M. F. de Groot
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitslaan 99, 3584 CG Utrecht, The Netherlands
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7
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Asakura K, Abe H, Kimura M. The challenge of constructing an international XAFS database. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:967-971. [PMID: 29979157 PMCID: PMC6038598 DOI: 10.1107/s1600577518006963] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 05/07/2018] [Indexed: 05/27/2023]
Abstract
The present state of XAFS databases, particularly in Japan, and proposals for future directions are presented. International collaboration is important for enlarging the database for further development of XAFS spectroscopy.
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Affiliation(s)
- Kiyotaka Asakura
- Institute for Catalysis, Hokkaido University, 21-10 Kita, Sapporo, Hokkaido 001-0021, Japan
| | - Hitoshi Abe
- Photon Factory, Institute of Materials’ Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
- Department of Materials’ Structure Science, School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Masao Kimura
- Photon Factory, Institute of Materials’ Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
- Department of Materials’ Structure Science, School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
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8
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Aghakhani S, Grandjean D, Baekelant W, Coutiño-Gonzalez E, Fron E, Kvashnina K, Roeffaers MBJ, Hofkens J, Sels BF, Lievens P. Atomic scale reversible opto-structural switching of few atom luminescent silver clusters confined in LTA zeolites. NANOSCALE 2018; 10:11467-11476. [PMID: 29888348 DOI: 10.1039/c8nr03222j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Luminescent silver clusters (AgCLs) stabilized inside partially Ag exchanged Na LTA zeolites show a remarkable reversible on-off switching of their green-yellowish luminescence that is easily tuned by a hydration and dehydration cycle, making them very promising materials for sensing applications. We have used a unique combination of photoluminescence (PL), UV-visible-NIR Diffuse Reflectance (DRS), X-ray absorption fine structure (XAFS), Fourier Transform-Infrared (FTIR) and electron spin resonance (ESR) spectroscopies to unravel the atomic-scale structural changes responsible for the reversible optical behavior of the confined AgCLs in LTA zeolites. Water coordinated, diamagnetic, tetrahedral AgCLs [Ag4(H2O)4]2+ with Ag atoms positioned along the axis of the sodalite six-membered rings are at the origin of the broad and intense green-yellowish luminescence in the hydrated sample. Upon dehydration, luminescent [Ag4(H2O)4]2+ clusters are transformed into non-luminescent (dark), diamagnetic, octahedral AgCLs [Ag6(OF)14]2+ with Ag atoms interacting strongly with zeolite framework oxygen (OF) of the sodalite four-membered rings. This highly responsive on-off switching reveals that besides quantum confinement and molecular-size, coordinated water and framework oxygen ligands strongly affect the organization of AgCLs valence electrons and play a crucial role in the opto-structural properties of AgCLs.
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Affiliation(s)
- Saleh Aghakhani
- Department of Physics and Astronomy, Laboratory of Solid State Physics and Magnetism, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium.
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9
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Ruan H, Nishibori M, Uchiyama T, Ninomiya K, Kamitani K, Konishi Y, Shimanoe K. Effect of Thermal Conductivity of Catalytic Materials on Soot Sensing Performance Based on a Combustion-type Sensor. CHEM LETT 2017. [DOI: 10.1246/cl.170480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hongcheng Ruan
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580
| | - Maiko Nishibori
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580
| | - Tomoki Uchiyama
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580
| | - Kakeru Ninomiya
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580
| | - Kazutaka Kamitani
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Yuko Konishi
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Kengo Shimanoe
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580
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10
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Naito T. Development of a Control Method for Conduction and Magnetism in Molecular Crystals. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160295] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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11
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Direct Control of Spin Distribution and Anisotropy in Cu-Dithiolene Complex Anions by Light. INORGANICS 2016. [DOI: 10.3390/inorganics4020007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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12
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Manceau A, Lemouchi C, Rovezzi M, Lanson M, Glatzel P, Nagy KL, Gautier-Luneau I, Joly Y, Enescu M. Structure, Bonding, and Stability of Mercury Complexes with Thiolate and Thioether Ligands from High-Resolution XANES Spectroscopy and First-Principles Calculations. Inorg Chem 2015; 54:11776-91. [DOI: 10.1021/acs.inorgchem.5b01932] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Mauro Rovezzi
- European Synchrotron Radiation Facility (ESRF), 71 Rue des Martyrs, 38000 Grenoble, France
| | | | - Pieter Glatzel
- European Synchrotron Radiation Facility (ESRF), 71 Rue des Martyrs, 38000 Grenoble, France
| | - Kathryn L. Nagy
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, MC-186, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | | | | | - Mironel Enescu
- Laboratoire
Chrono Environnement, Université de Franche-Comté, CNRS, 25030 Besançon, France
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13
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Attia YA, Buceta D, Requejo FG, Giovanetti LJ, López-Quintela MA. Photostability of gold nanoparticles with different shapes: the role of Ag clusters. NANOSCALE 2015; 7:11273-9. [PMID: 26068070 DOI: 10.1039/c5nr01887k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Anisotropic gold nanostructures prepared by the seed method in the presence of Ag ions have been used to study their photostability to low-power UV irradiation (254 nm) at room temperature. It has been observed that, whereas spheres are very stable to photoirradiation, rods and prisms suffer from photocorrosion and finally dissolve completely with the production of Au(III) ions. Interpretation of these differences is based on the presence of semiconductor-like Ag clusters, adsorbed onto rods and prisms, able to photocorrode the Au nanoparticles, which are absent in the case of Au spheres. We further show direct evidence of the presence of Ag clusters in Au nanorods by XANES. These results confirm a previous hypothesis (J. Am. Chem. Soc., 2014, 136, 1182-1185) about the major influence of very stable small Ag clusters, not only on the anisotropic formation of nanostructures but also on their photostability.
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Affiliation(s)
- Yasser A Attia
- Laboratorio de Magnetismo y Nanotecnología, Technological Research Institute, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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14
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Hsiao IL, Hsieh YK, Wang CF, Chen IC, Huang YJ. Trojan-horse mechanism in the cellular uptake of silver nanoparticles verified by direct intra- and extracellular silver speciation analysis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:3813-21. [PMID: 25692749 DOI: 10.1021/es504705p] [Citation(s) in RCA: 160] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The so-called "Trojan-horse" mechanism, in which nanoparticles are internalized within cells and then release high levels of toxic ions, has been proposed as a behavior in the cellular uptake of Ag nanoparticles (AgNPs). While several reports claim to have proved this mechanism by measuring AgNPs and Ag ions (I) in cells, it cannot be fully proven without examining those two components in both intra- and extracellular media. In our study, we found that even though cells take up AgNPs similarly to (microglia (BV-2)) or more rapidly than (astrocyte (ALT)) Ag (I), the ratio of AgNPs to total Ag (AgNPs+Ag (I)) in both cells was lower than that in outside media. It could be explained that H2O2, a major intracellular reactive oxygen species (ROS), reacts with AgNPs to form more Ag (I). Moreover, the major speciation of Ag (I) in cells was Ag(cysteine) and Ag(cysteine)2, indicating the possible binding of monomer cysteine or vital thiol proteins/peptides to Ag ions. Evidence we found indicates that the Trojan-horse mechanism really exists.
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Affiliation(s)
- I-Lun Hsiao
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013
| | - Yi-Kong Hsieh
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013
| | - Chu-Fang Wang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013
| | - I-Chieh Chen
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013
| | - Yuh-Jeen Huang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013
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15
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Coutino-Gonzalez E, Grandjean D, Roeffaers M, Kvashnina K, Fron E, Dieu B, De Cremer G, Lievens P, Sels B, Hofkens J. X-ray irradiation-induced formation of luminescent silver clusters in nanoporous matrices. Chem Commun (Camb) 2014; 50:1350-2. [DOI: 10.1039/c3cc47969b] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The formation of highly luminescent silver clusters in zeolites using X-ray lithography is reported in this study.
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Affiliation(s)
| | - Didier Grandjean
- Department of Physics and Astronomy
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- B-3001 Leuven, Belgium
| | - Maarten Roeffaers
- Department of Microbial and Molecular Systems
- Centre for Surface Chemistry and Catalysis
- KU Leuven
- B-3001 Leuven, Belgium
| | - Kristina Kvashnina
- European Synchrotron Radiation Facility (ESRF)
- 6 Rue Jules Horowitz
- 38043 Grenoble Cedex 9, France
| | - Eduard Fron
- Department of Chemistry
- KU Leuven
- B-3001 Leuven, Belgium
| | - Bjorn Dieu
- Department of Chemistry
- KU Leuven
- B-3001 Leuven, Belgium
| | - Gert De Cremer
- Department of Microbial and Molecular Systems
- Centre for Surface Chemistry and Catalysis
- KU Leuven
- B-3001 Leuven, Belgium
- DSM Ahead
| | - Peter Lievens
- Department of Physics and Astronomy
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- B-3001 Leuven, Belgium
| | - Bert Sels
- Department of Microbial and Molecular Systems
- Centre for Surface Chemistry and Catalysis
- KU Leuven
- B-3001 Leuven, Belgium
| | - Johan Hofkens
- Department of Chemistry
- KU Leuven
- B-3001 Leuven, Belgium
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16
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Fernández GA, Picco AS, Ceolı́n MR, Chopa AB, Silbestri GF. Synthesis and Structural Characterization of Water-Soluble Gold(I) N-Heterocyclic Carbene Complexes. An X-ray Absorption Fine Structure Spectroscopy (XAFS) Study. Organometallics 2013. [DOI: 10.1021/om400663a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Gabriela A. Fernández
- Instituto de Quı́mica
del Sur (INQUISUR), Departamento de Quı́mica, Universidad Nacional del Sur, Av. Alem 1253, B8000CPB Bahı́a Blanca, Argentina
| | - Agustı́n S. Picco
- Instituto de Investigaciones Fisicoquı́micas Teóricas
y Aplicadas (INIFTA), Universidad Nacional de La Plata, CONICET.
CC. 16 Suc. 4, 1900 La Plata, Argentina
| | - Marcelo R. Ceolı́n
- Instituto de Investigaciones Fisicoquı́micas Teóricas
y Aplicadas (INIFTA), Universidad Nacional de La Plata, CONICET.
CC. 16 Suc. 4, 1900 La Plata, Argentina
| | - Alicia B. Chopa
- Instituto de Quı́mica
del Sur (INQUISUR), Departamento de Quı́mica, Universidad Nacional del Sur, Av. Alem 1253, B8000CPB Bahı́a Blanca, Argentina
| | - Gustavo F. Silbestri
- Instituto de Quı́mica
del Sur (INQUISUR), Departamento de Quı́mica, Universidad Nacional del Sur, Av. Alem 1253, B8000CPB Bahı́a Blanca, Argentina
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17
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Selective hydrogenation of acrolein on supported silver catalysts: A kinetics study of particle size effects. J Catal 2013. [DOI: 10.1016/j.jcat.2012.10.027] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Cho DY, Valov I, van den Hurk J, Tappertzhofen S, Waser R. Direct observation of charge transfer in solid electrolyte for electrochemical metallization memory. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:4552-4556. [PMID: 22786689 DOI: 10.1002/adma.201201499] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Revised: 05/10/2012] [Indexed: 06/01/2023]
Abstract
X-ray absorption spectroscopy study on an electrochemical metallization cell of GeS(x) :Ag shows clear experimental evidence of chemical ionization of the active metal atoms (Ag) and consequent transfer of charge to the electrolyte (GeS(x) ). The valence electron density and its change upon the Ag intercalation are depicted schematically as transparent waves on the Ge-S bond structure in amorphous GeS(x) .
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Affiliation(s)
- Deok-Yong Cho
- Institut für Werkstoffe der Elektrotechnik, 2 & JARA-Fundamentals of Future Information Technology, RWTH Aachen University, 52056 Aachen, Germany
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Shimizu KI, Kamiya Y, Osaki K, Yoshida H, Satsuma A. The average Pd oxidation state in Pd/SiO2 quantified by L3-edge XANES analysis and its effects on catalytic activity for CO oxidation. Catal Sci Technol 2012. [DOI: 10.1039/c2cy00422d] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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