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Heryanto H, Siswanto S, Rahmat R, Sulieman A, Bradley DA, Tahir D. Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties. ACS OMEGA 2023; 8:18591-18602. [PMID: 37273611 PMCID: PMC10233663 DOI: 10.1021/acsomega.3c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/18/2023] [Indexed: 06/06/2023]
Abstract
Efforts to produce microwave absorber materials that are inexpensive and environmentally friendly have become a means of greening the environment. The breakthrough can be focused on industrial waste and natural materials for functional purposes and how to enhance their performance. We successfully synthesized nickel slag/laterite soil (NS/LS) and nickel slag/iron sand (NS/IS) nanocomposites using a simple mechanical alloying technique, and the electromagnetic (EM) wave absorption capacities of the nanocomposites were measured using a vector network analyzer. The structural properties of the nanocomposites were analyzed by X-ray diffraction spectroscopy, where the results of the analysis showed that NS/IS has the largest crystallite size (15.69 nm) and the highest EM wave absorption performance. The optical properties of the nanocomposites were determined from their Fourier transform infrared spectra using the Kramers-Kronig relation. As determined through a quantitative analysis of the optical properties, the distance between the longitudinal and transversal optical phonon wavenumber positions (Δ(LO - TO) = 65 cm-1) is inversely proportional to the reflection loss. The surface morphologies of the nanocomposites were analyzed by scanning electron microscopy, and the particle diameters were observed by binary image and Gaussian distribution analyses. The nanocomposite surface exhibits a graded-like morphology, which indicates multiple reflections of the EM radiation, consequently reducing the EM interference. The best nanocomposite for an attenuated EM wave achieved a reflection loss of -39.14 dB at 5-8 GHz. A low penetration depth has implications for the electrical charge tuning of the storage and composite magnets. Finally, the EM absorption properties of NS/IS and NS/LS indicate a 2-mm-thick environmentally friendly nanocomposite for EM absorption.
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Affiliation(s)
- Heryanto Heryanto
- Department
of Physics, Hasanuddin University, Makassar 90245, Indonesia
| | - Siswanto Siswanto
- Department
of Statistics, Hasanuddin University, Makassar 90245, Indonesia
| | - Roni Rahmat
- Department
of Physics, Hasanuddin University, Makassar 90245, Indonesia
| | - Abdelmoneim Sulieman
- Department
of Radiology and Medical Imaging Sciences, College of Applied Medical
Sciences, Prince Sattam bin Abdulaziz University, P.O. Box 422, Alkharj 11942, Saudi Arabia
| | - David A. Bradley
- Centre
for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- Centre
for Applied Physics and Radiation Technologies, School of Engineering
and Technology, Sunway University, 47500 Bandar Sunway, Selangor, Malaysia
| | - Dahlang Tahir
- Department
of Physics, Hasanuddin University, Makassar 90245, Indonesia
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Öström H, Zhang B, Vallejo T, Merrill B, Huang J, LaRue J. Methanol decomposition on Ni(111) and O/Ni(111). J Chem Phys 2022; 156:024704. [PMID: 35032981 DOI: 10.1063/5.0072396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Methanol decomposition on Ni(111) surfaces has been studied in the presence and absence of oxygen using temperature-programmed desorption and temperature-dependent sum frequency generation spectroscopy. Under both conditions the C-H and O-H bonds break, forming carbon monoxide and atomic hydrogen on the surface. No C-O bond scission was observed, limiting the number of reaction pathways. The O-H bonds break first (>150 K), forming surface methoxy, followed by C-H bond breakage (>250 K). All atomic hydrogen desorbs from the surface as H2 through H+H recombinative desorption. H2 desorbs at a higher temperature in the presence of oxygen (>300 K) than the absence of oxygen (>250 K) as the oxygen on the surface stabilizes the H atoms, forming surface hydroxide (OH). The surface oxygen also appears to stabilize the O-H and C-H bonds, leading to slightly higher dissociation temperatures. The CO molecules occupy both the bridge sites and the top sites of the Ni atoms as surface H appears to force the CO molecules to the top sites. There is a slight blueshift in the C-O bond vibration for both the O covered and O free surfaces due to CO being more mobile. On the O free surface, the C-O peak width broadens as low-frequency modes are activated. Finally, CO desorbs between 350 and 400 K.
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Affiliation(s)
- Henrik Öström
- Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
| | - Bingjie Zhang
- Schmid College of Science and Technology, Chapman University, Orange, California 92866, USA
| | - Tiffany Vallejo
- Schmid College of Science and Technology, Chapman University, Orange, California 92866, USA
| | - Bryn Merrill
- Schmid College of Science and Technology, Chapman University, Orange, California 92866, USA
| | - Jeremy Huang
- University of California at Berkeley, Berkeley, California 94720, USA
| | - Jerry LaRue
- Schmid College of Science and Technology, Chapman University, Orange, California 92866, USA
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Czap G, Han Z, Wagner PJ, Ho W. Detection and Characterization of Anharmonic Overtone Vibrations of Single Molecules on a Metal Surface. PHYSICAL REVIEW LETTERS 2019; 122:106801. [PMID: 30932655 DOI: 10.1103/physrevlett.122.106801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Indexed: 06/09/2023]
Abstract
Inelastic electron tunneling spectroscopy (IETS) with the scanning tunneling microscope (STM) is a powerful technique used to characterize the vibration and spin states at the single-molecule level. While IETS lacks hard selection rules, historically it has been assumed that vibrational overtones are rarely seen or even absent. Here we provide definitive experimental evidence that the hindered rotation overtone excitation of carbon monoxide molecules adsorbed on Ag(110) can be detected with STM-IETS via isotope substitution. We also demonstrate that the anharmonicity of the overtone excitation can be characterized and compared between adsorption sites and find evidence of anisotropy in the vibrational anharmonicity for CO adsorbed on the [11[over ¯]0] step edge.
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Affiliation(s)
- Gregory Czap
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Zhumin Han
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - Peter J Wagner
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
| | - W Ho
- Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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4
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Carey SJ, Zhao W, Harman E, Baumann AK, Mao Z, Zhang W, Campbell CT. Energetics of Adsorbed Methanol and Methoxy on Ni(111): Comparisons to Pt(111). ACS Catal 2018. [DOI: 10.1021/acscatal.8b02992] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Spencer J. Carey
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Wei Zhao
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Elizabeth Harman
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Ann-Katrin Baumann
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Zhongtian Mao
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Wei Zhang
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Charles T. Campbell
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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5
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Kennema M, de Castro IBD, Meemken F, Rinaldi R. Liquid-Phase H-Transfer from 2-Propanol to Phenol on Raney Ni: Surface Processes and Inhibition. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03201] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Marco Kennema
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr D-45470, Germany
| | | | - Fabian Meemken
- Department
of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland
| | - Roberto Rinaldi
- Department
of Chemical Engineering, Imperial College London, SW7 2AZ London, United Kingdom
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Rao A, Bankar A, Kumar AR, Gosavi S, Zinjarde S. Removal of hexavalent chromium ions by Yarrowia lipolytica cells modified with phyto-inspired Fe0/Fe3O4 nanoparticles. JOURNAL OF CONTAMINANT HYDROLOGY 2013; 146:63-73. [PMID: 23422514 DOI: 10.1016/j.jconhyd.2012.12.008] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 11/30/2012] [Accepted: 12/16/2012] [Indexed: 05/21/2023]
Abstract
The removal of hexavalent chromium [Cr (VI)], an important ground water pollutant by phyto-inspired Fe(0)/Fe(3)O(4) nanocomposite-modified cells of Yarrowia lipolytica (NCIM 3589 and NCIM 3590), was investigated. Electron microscopy and magnetometer studies indicated an effective modification of yeast cell surfaces by the nanocomposites. The effect of pH, temperature, agitation speed, contact time and initial metal ion concentration on the removal of Cr (VI) was determined. The specific uptake values at pH 2.0 were 186.32±3.17 and 137.31±4.53 mg g(-1) for NCIM 3589 and NCIM 3590, respectively, when 1000 mg L(-1) of metal ion concentrations were used. The equilibrium data fitted to Scatchard, Langmuir and linearized Freundlich models suggesting that adsorption played a role in the removal of Cr (VI) ions. The surface modified yeast cells displayed higher values of Langmuir and Scatchard coefficients than the unmodified cells indicating that the former were more efficient in Cr (VI) removal. The enhanced detoxification of Cr (VI) ions by this composite material could be attributed to the reductive power of the Fe(0)/Fe(3)O(4) nanocomposites as well the yeast cell surface functional groups.
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Affiliation(s)
- Ashit Rao
- Institute of Bioinformatics and Biotechnology, University of Pune, Pune 411 007, India
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Blomquist J, Uvdal P. Surface adsorbate vibrations explored by infrared spectroscopy and DFT cluster calculations at the anharmonic level: CO on Cu(100). Phys Chem Chem Phys 2010; 12:14162-8. [PMID: 20877837 DOI: 10.1039/c0cp00228c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The vibrational properties of the CO/Cu(100) surface adsorbate system have been explored by infrared spectroscopy and DFT cluster calculations. We show that all four fundamental, FT(x,y), FR(x,y), FT(z) and ν(C-O), vibrational modes are very well reproduced with respect to experiments by the present calculations and they are at the highest level reported to date. Our work demonstrates that it is essential to include both anharmonicity and cluster relaxation when modeling the CO/Cu(100) system. The absence and presence of binary modes: 2 ×ν(C-O) and FT(z) + ν(C-O) in our experimental data are discussed as well.
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Affiliation(s)
- J Blomquist
- Chemical Physics, Department of Chemistry, PO Box 124 and MAX-lab, PO Box 118, Lund University, S-22100 Lund, Sweden
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8
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Pang XY, Wang C, Zhou YH, Zhao JM, Wang GC. DFT study of the structure sensitivity for the adsorption of methyl, methoxy, and formate on Ni(111), Ni(100), and Ni(110) surfaces. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2010.01.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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DFT studies of methanol decomposition on Ni(100) surface: Compared with Ni(111) surface. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2006.04.013] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Kubota J, Kusafuka K, Wada A, Domen K, Kano SS. Time-resolved sum-frequency generation spectroscopy of methoxy and deuterated methoxy on Ni(111) using near-infrared laser pulses. J Phys Chem B 2006; 110:10785-91. [PMID: 16771327 DOI: 10.1021/jp060699g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Methoxy (CH3O-) and deuterated (d-) methoxy (CD3O-) species on Ni(111) are investigated by sum-frequency generation (SFG) spectroscopy. Methoxy adsorbed on the Ni(111) surface is confirmed by SFG spectroscopy to be oriented normal to the surface. Two resonant peaks produced by methoxy, at 2921 and 2821 cm(-1), are assigned to Fermi resonance between the CH symmetric stretching and overtone modes. Deuterated methoxy exhibits a single strong peak at 2051 cm(-1) assigned to the CD symmetric stretching mode. Investigation of the sub-nanosecond transient behavior of methoxy and d-methoxy species on Ni(111) under short-pulse laser pumping at 1064 nm reveals a clear weakening and recovery of the SFG peaks upon heating. The observed temporal profile is reproduced by simulation assuming that the original methoxy in the ground state is in chemical equilibrium with a new state produced by instantaneous heating. The dependence of the SFG spectra on the initial substrate temperature is also reproduced by the simulation. The simulation suggests a temperature jump of 250 K upon laser pumping, inducing a change in the molecular orientation or adsorption site of methoxy on the Ni(111) surface without decomposition of methoxy to adsorbed CO and hydrogen, which occurs under normal heating at 200 K.
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Affiliation(s)
- Jun Kubota
- Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuda, Midori-ku, Yokohama 226-8503, Japan.
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11
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Andersson MP, Blomquist J, Uvdal P. Surface-induced C–O bond anharmonicity of methoxy adsorbed on Cu(100): Experiments and density-functional theory calculations. J Chem Phys 2005; 123:224714. [PMID: 16375502 DOI: 10.1063/1.2125587] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The anharmonic properties of a surface intermediate, methoxy, adsorbed on Cu(100) are investigated by surface infrared overtone spectroscopy and density-functional-theory electronic structure calculations. The anharmonicity is measured in the zero-coverage limit, and it is observed that the anharmonicity is increased upon adsorption as compared with the free methanol. By combining experiments with calculations we demonstrate that modifications of the anharmonicity of the methoxy species is indeed induced by adsorption onto the copper surface and not by the formation of the methoxy species.
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Affiliation(s)
- M P Andersson
- Department of Chemical Physics, Lund University, P.O. Box 124, S-221 00 Lund, Sweden
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12
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Wang GC, Zhou YH, Morikawa Y, Nakamura J, Cai ZS, Zhao XZ. Kinetic Mechanism of Methanol Decomposition on Ni(111) Surface: A Theoretical Study. J Phys Chem B 2005; 109:12431-42. [PMID: 16852538 DOI: 10.1021/jp0463969] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The decomposition of methanol on the Ni(111) surface has been studied with the pseudopotential method of density functional theory-generalized gradient approximation (DFT-GGA) and with the repeated slab models. The adsorption energies of possible species and the activation energy barriers of the possible elementary reactions involved are obtained in the present work. The major reaction path on Ni surfaces involves the O-H bond breaking in CH(3)OH and the further decomposition of the resulting methoxy species to CO and H via stepwise hydrogen abstractions from CH(3)O. The abstraction of hydrogen from methoxy itself is the rate-limiting step. We also confirm that the C-O and C-H bond-breaking paths, which lead to the formation of surface methyl and hydroxyl and hydroxymethyl and atom hydrogen, respectively, have higher energy barriers. Therefore, the final products are the adsorbed CO and H atom.
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Affiliation(s)
- Gui-Chang Wang
- Department of Chemistry, and the Center of Theoretical Chemistry Study, Nankai University, Tianjin, 300071, P. R. China.
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Wang GC, Zhou YH, Nakamura J. Characterization of methoxy adsorption on some transition metals: A first principles density functional theory study. J Chem Phys 2005; 122:44707. [PMID: 15740283 DOI: 10.1063/1.1839552] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Based on the gradient-density functional theory, calculation results of methoxy adsorption on Au(111), Ag(111), Cu(111), Pt(111), Pd(111), Ni(111), Rh(111), and Fe(100) surfaces are presented, and a consistent picture for some key physical properties determining the reactivity of metals appears. These eight metals belong to two groups: either with filled d electrons (group IB) or with unfilled but more than half filled d electrons (group VIII). The calculated adsorption energies are quite in agreement with the experimental data as well as the previous theoretical calculation results. Importantly, using the analysis of B. Hammer and J. K. Norskov, Nature (London) 376, 232 (1995) and in Chemisorption and Reactivity on Supported Clusters and Thin Films, edited by R. M. Lambert and G. Pacchioni (Kluwer Academic, Dordrecht, 1997), pp. 285-351, the binding energies have selectively been linearly correlated to the d-band center and to the size of the metal d-band orbital overlapping with the adsorbate (coupling matrix element) for these two groups of metals. And by analyzing the nature of the adsorption bonding, the possible reason of this difference is suggested.
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Affiliation(s)
- Gui-Chang Wang
- Department of Chemistry and the Center of Theoretical Chemistry Study, Nankai University, Tianjin 300071, People's Republic of China
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14
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Pratt SJ, Escott DK, King DA. Multilayer growth and chemisorbate reactivity of methanol on Pd{110}. J Chem Phys 2003. [DOI: 10.1063/1.1620993] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Sim WS, Li TC, Yang PX, Yeo BS. Isolation and identification of surface-bound acetone enolate on Ni(111). J Am Chem Soc 2002; 124:4970-1. [PMID: 11982356 DOI: 10.1021/ja025749j] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A surface-bound acetone enolate species has been synthesized on Ni(111) between 260 and 340 K by two different routes catalyzed by surface Ni and O atoms: deprotonation of acetone and deacetylation of acetylacetone. The reaction pathways and surface species have been identified using reflection absorption infrared spectroscopy (RAIRS) in combination with isotopic substitution and density functional theory (DFT) calculations. Acetone enolate exhibits characteristic vibrational absorption bands at 1260, 1353, and 1545 cm-1 arising from mixed modes that involve CC stretching, CH3 bending, and CO stretching. This work conclusively proves the existence of stable acetone enolate species on a metal single-crystal surface and provides its first detailed characterization.
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Affiliation(s)
- Wee-Sun Sim
- Department of Chemistry, National University of Singapore, Kent Ridge, Singapore 119260, Singapore.
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Andersson MP, Uvdal P, MacKerell AD. Fundamental, Binary Combination, and Overtone Modes in Methoxy Adsorbed on Cu(100): Infrared Spectroscopy and Ab Initio Calculations. J Phys Chem B 2002. [DOI: 10.1021/jp012939s] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. P. Andersson
- Chemical Physics, Department of Chemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden
| | - P. Uvdal
- Chemical Physics, Department of Chemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden
| | - A. D. MacKerell
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland at Baltimore, Baltimore, Maryland 21201
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17
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Comparative study of geometry and bonding character for methoxy radical adsorption on noble metals. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0166-1280(99)00286-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Mudalige K, Warren S, Trenary M. Vibrational Analysis of a Chemisorbed Polyatomic Molecule: Methoxy on Cu(100). J Phys Chem B 2000. [DOI: 10.1021/jp9933121] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kanchana Mudalige
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, Illinois 60607-7061
| | - Samantha Warren
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, Illinois 60607-7061
| | - Michael Trenary
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, Illinois 60607-7061
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Ásmundsson R, Uvdal P. Fermi resonance coupling in a surface adsorbate: The C–H stretch in methoxy adsorbed on Cu(100) calculations and experiments. J Chem Phys 2000. [DOI: 10.1063/1.480635] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Queeney KT, Friend CM. Site-Selective Surface Reactions: Hydrocarbon Oxidation Processes on Oxidized Mo(110). J Phys Chem B 1999. [DOI: 10.1021/jp991994m] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. T. Queeney
- Harvard University, Department of Chemistry, 12 Oxford Street, Cambridge, Massachusetts 02138
| | - C. M. Friend
- Harvard University, Department of Chemistry, 12 Oxford Street, Cambridge, Massachusetts 02138
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Weldon MK, Friend CM. Probing Surface Reaction Mechanisms Using Chemical and Vibrational Methods: Alkyl Oxidation and Reactivity of Alcohols on Transitions Metal Surfaces. Chem Rev 1996; 96:1391-1412. [PMID: 11848795 DOI: 10.1021/cr950224d] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marcus K. Weldon
- Department of Chemistry, Harvard University, Cambridge, Massachusetts 02138Department of Chemistry
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Uvdal P, Weldon MK, Friend CM. Surface-induced bond anharmonicity probed through a two-phonon bound state: Methoxide adsorbed on Mo(110). PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:5007-5010. [PMID: 9984063 DOI: 10.1103/physrevb.53.5007] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Weldon MK, Uvdal P, Friend CM, Serafin JG. Decoupling of vibrational modes as a structural tool: Coverage‐induced reorientation of methoxide on Mo(110). J Chem Phys 1995. [DOI: 10.1063/1.470594] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Uvdal P, MacKerell AD, Wiegand BC, Friend CM. Surface-induced alteration of adsorbate electronic structure and intramolecular vibrational coupling: The vibrational spectrum of 2-propoxide on Mo(110) as determined by ab initio calculations and experiments. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:7844-7848. [PMID: 9977368 DOI: 10.1103/physrevb.51.7844] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Uvdal P, Weldon MK, Friend CM. Adsorbate symmetry and Fermi resonances of methoxide adsorbed on Mo(110) as studied by surface infrared spectroscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:12258-12261. [PMID: 9975384 DOI: 10.1103/physrevb.50.12258] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Luo JS, Tobin RG, Lambert DK, Fisher GB, DiMaggio CL. CO on Pt(335): Vibrational overtones and site dependence of the vibrational Stark effect. J Chem Phys 1993. [DOI: 10.1063/1.465380] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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