1
|
Isotope Effect in Thermal Conductivity of Polycrystalline CVD-Diamond: Experiment and Theory. CRYSTALS 2021. [DOI: 10.3390/cryst11040322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We measured the thermal conductivity κ(T) of polycrystalline diamond with natural (natC) and isotopically enriched (12C content up to 99.96 at.%) compositions over a broad temperature T range, from 5 to 410 K. The high quality polycrystalline diamond wafers were produced by microwave plasma chemical vapor deposition in CH4-H2 mixtures. The thermal conductivity of 12C diamond along the wafer, as precisely determined using a steady-state longitudinal heat flow method, exceeds much that of the natC sample at T>60 K. The enriched sample demonstrates the value of κ(298K)=25.1±0.5 W cm−1 K−1 that is higher than the ever reported conductivity of natural and synthetic single crystalline diamonds with natural isotopic composition. A phenomenological theoretical model based on the full version of Callaway theory of thermal conductivity is developed which provides a good approximation of the experimental data. The role of different resistive scattering processes, including due to minor isotope 13C atoms, defects, and grain boundaries, is estimated from the data analysis. The model predicts about a 37% increase of thermal conductivity for impurity and dislocation free polycrystalline chemical vapor deposition (CVD)-diamond with the 12C-enriched isotopic composition at room temperature.
Collapse
|
2
|
Cuscó R, Edgar JH, Liu S, Li J, Artús L. Isotopic Disorder: The Prevailing Mechanism in Limiting the Phonon Lifetime in Hexagonal BN. PHYSICAL REVIEW LETTERS 2020; 124:167402. [PMID: 32383900 DOI: 10.1103/physrevlett.124.167402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Abstract
The phonon linewidth of isotopically controlled hexagonal boron nitride (h-BN) single crystals has been determined by Raman scattering. The scattering by isotopic mass disorder induces a phonon broadening that is largest for boron 11 fractions around 0.65. Lowest-order perturbation theory does not suffice to explain the dependence of the isotopic broadening on isotopic composition. A multiple-scattering theory based on the coherent potential approximation provides a good quantitative account of the phonon shift and broadening with isotopic composition observed in the experiments. Isotopic-disorder scattering is shown to have a prominent role in limiting the optical-phonon lifetime in h-BN.
Collapse
Affiliation(s)
- Ramon Cuscó
- Institut Jaume Almera (ICTJA-CSIC), Consejo Superior de Investigaciones Científicas, Lluís Solé i Sabarís s.n., 08028 Barcelona, Spain
| | - James H Edgar
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - Song Liu
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - Jiahan Li
- Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - Luis Artús
- Institut Jaume Almera (ICTJA-CSIC), Consejo Superior de Investigaciones Científicas, Lluís Solé i Sabarís s.n., 08028 Barcelona, Spain
| |
Collapse
|
3
|
Martin Somer A, Macaluso V, Barnes GL, Yang L, Pratihar S, Song K, Hase WL, Spezia R. Role of Chemical Dynamics Simulations in Mass Spectrometry Studies of Collision-Induced Dissociation and Collisions of Biological Ions with Organic Surfaces. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:2-24. [PMID: 32881516 DOI: 10.1021/jasms.9b00062] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this article, a perspective is given of chemical dynamics simulations of collisions of biological ions with surfaces and of collision-induced dissociation (CID) of ions. The simulations provide an atomic-level understanding of the collisions and, overall, are in quite good agreement with experiment. An integral component of ion/surface collisions is energy transfer to the internal degrees of freedom of both the ion and the surface. The simulations reveal how this energy transfer depends on the collision energy, incident angle, biological ion, and surface. With energy transfer to the ion's vibration fragmentation may occur, i.e. surface-induced dissociation (SID), and the simulations discovered a new fragmentation mechanism, called shattering, for which the ion fragments as it collides with the surface. The simulations also provide insight into the atomistic dynamics of soft-landing and reactive-landing of ions on surfaces. The CID simulations compared activation by multiple "soft" collisions, resulting in random excitation, versus high energy single collisions and nonrandom excitation. These two activation methods may result in different fragment ions. Simulations provide fragmentation products in agreement with experiments and, hence, can provide additional information regarding the reaction mechanisms taking place in experiment. Such studies paved the way on using simulations as an independent and predictive tool in increasing fundamental understanding of CID and related processes.
Collapse
Affiliation(s)
- Ana Martin Somer
- Departamento de Química, Facultad de Ciencias, Módulo 13 Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC Cantoblanco, 28049 Madrid, Spain
| | - Veronica Macaluso
- LAMBE, Univ Evry, CNRS, CEA, Université Paris-Saclay, 91025 Evry, France
| | - George L Barnes
- Department of Chemistry and Biochemistry, Siena College, Loudonville, New York 12211, United States
| | - Li Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Subha Pratihar
- Department of Chemistry and Biochemistry Texas Tech University, Lubbock, Texas 79409, United States
| | - Kihyung Song
- Department of Chemistry, Korea National University of Education, Chungbuk 28644, Republic of Korea
| | - William L Hase
- Department of Chemistry and Biochemistry Texas Tech University, Lubbock, Texas 79409, United States
| | - Riccardo Spezia
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, 4, Place Jussieu, Paris, 75252 Cedex 05, France
| |
Collapse
|
4
|
Vuong TQP, Liu S, Van der Lee A, Cuscó R, Artús L, Michel T, Valvin P, Edgar JH, Cassabois G, Gil B. Isotope engineering of van der Waals interactions in hexagonal boron nitride. NATURE MATERIALS 2018; 17:152-158. [PMID: 29251722 DOI: 10.1038/nmat5048] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 11/01/2017] [Indexed: 05/28/2023]
Abstract
Hexagonal boron nitride is a model lamellar compound where weak, non-local van der Waals interactions ensure the vertical stacking of two-dimensional honeycomb lattices made of strongly bound boron and nitrogen atoms. We study the isotope engineering of lamellar compounds by synthesizing hexagonal boron nitride crystals with nearly pure boron isotopes (10B and 11B) compared to those with the natural distribution of boron (20 at% 10B and 80 at% 11B). On the one hand, as with standard semiconductors, both the phonon energy and electronic bandgap varied with the boron isotope mass, the latter due to the quantum effect of zero-point renormalization. On the other hand, temperature-dependent experiments focusing on the shear and breathing motions of adjacent layers revealed the specificity of isotope engineering in a layered material, with a modification of the van der Waals interactions upon isotope purification. The electron density distribution is more diffuse between adjacent layers in 10BN than in 11BN crystals. Our results open perspectives in understanding and controlling van der Waals bonding in layered materials.
Collapse
Affiliation(s)
- T Q P Vuong
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - S Liu
- Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - A Van der Lee
- Institut Européen des Membranes, UMR 5635 CNRS-Univ. Montpellier-ENSCM, 34095 Montpellier, France
| | - R Cuscó
- Institut Jaume Almera, Consejo Superior de Investigaciones Científicas (ICTJA-CSIC), 08028 Barcelona, Spain
| | - L Artús
- Institut Jaume Almera, Consejo Superior de Investigaciones Científicas (ICTJA-CSIC), 08028 Barcelona, Spain
| | - T Michel
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - P Valvin
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - J H Edgar
- Department of Chemical Engineering, Kansas State University, Manhattan, Kansas 66506, USA
| | - G Cassabois
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| | - B Gil
- Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France
| |
Collapse
|
5
|
Pezzotti G, Adachi T, Gasparutti I, Vincini G, Zhu W, Boffelli M, Rondinella A, Marin E, Ichioka H, Yamamoto T, Marunaka Y, Kanamura N. Vibrational monitor of early demineralization in tooth enamel after in vitro exposure to phosphoridic liquid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:19-33. [PMID: 27588727 DOI: 10.1016/j.saa.2016.08.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/15/2016] [Accepted: 08/18/2016] [Indexed: 06/06/2023]
Abstract
The Raman spectroscopic method has been applied to quantitatively assess the in vitro degree of demineralization in healthy human teeth. Based on previous evaluations of Raman selection rules (empowered by an orientation distribution function (ODF) statistical algorithm) and on a newly proposed analysis of phonon density of states (PDOS) for selected vibrational modes of the hexagonal structure of hydroxyapatite, a molecular-scale evaluation of the demineralization process upon in vitro exposure to a highly acidic beverage (i.e., CocaCola™ Classic, pH=2.5) could be obtained. The Raman method proved quite sensitive and spectroscopic features could be directly related to an increase in off-stoichiometry of the enamel surface structure since the very early stage of the demineralization process (i.e., when yet invisible to other conventional analytical techniques). The proposed Raman spectroscopic algorithm might possess some generality for caries risk assessment, allowing a prompt non-contact diagnostic practice in dentistry.
Collapse
Affiliation(s)
- Giuseppe Pezzotti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan; Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan.
| | - Tetsuya Adachi
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Isabella Gasparutti
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan; Department of Engineering and Architecture, University of Trieste, Via A. Valerio 6/A, 34127 Trieste, Italy
| | - Giulio Vincini
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan; Chemistry, Material and Chemical Engineering Department "Giulio Natta", Polytechnic of Milan, Via Mancinelli 7, Milan 20131, Italy
| | - Wenliang Zhu
- Department of Medical Engineering for Treatment of Bone and Joint Disorders, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0854, Japan
| | - Marco Boffelli
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan
| | - Alfredo Rondinella
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan; Department of Engineering and Architecture, University of Trieste, Via A. Valerio 6/A, 34127 Trieste, Italy
| | - Elia Marin
- Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan
| | - Hiroaki Ichioka
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Toshiro Yamamoto
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Yoshinori Marunaka
- Department of Molecular Cell Physiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan; Department of Bio-Ionomics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Narisato Kanamura
- Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto 602-8566, Japan
| |
Collapse
|
6
|
Pratihar S, Barnes GL, Hase WL. Chemical dynamics simulations of energy transfer, surface-induced dissociation, soft-landing, and reactive-landing in collisions of protonated peptide ions with organic surfaces. Chem Soc Rev 2016; 45:3595-608. [DOI: 10.1039/c5cs00482a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different simulation approaches like MM, QM + MM, and QM/MM, were used to study surface-induced dissociation, soft-landing, and reactive-landing for the peptide-H+ + surface collisions.
Collapse
Affiliation(s)
- Subha Pratihar
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| | - George L. Barnes
- Department of Chemistry and Biochemistry
- Siena College
- Loudonville
- USA
| | - William L. Hase
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| |
Collapse
|
7
|
Park K, Deb B, Song K, Hase WL. Importance of shattering fragmentation in the surface-induced dissociation of protonated octaglycine. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2009; 20:939-948. [PMID: 19318279 DOI: 10.1016/j.jasms.2009.02.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 02/25/2009] [Accepted: 02/25/2009] [Indexed: 05/27/2023]
Abstract
A QM + MM direct chemical dynamics simulation was performed to study collisions of protonated octaglycine, gly(8)-H(+), with the diamond {111} surface at an initial collision energy E(i) of 100 eV and incident angle theta(i) of 0 degrees and 45 degrees. The semiempirical model AM1 was used for the gly(8)-H(+) intramolecular potential, so that its fragmentation could be studied. Shattering dominates gly(8)-H(+) fragmentation at theta(i) = 0 degrees, with 78% of the ions dissociating in this way. At theta(i) = 45 degrees shattering is much less important. For theta(i) = 0 degrees there are 304 different pathways, many related by their backbone cleavage patterns. For the theta(i) = 0 degrees fragmentations, 59% resulted from both a-x and b-y cleavages, while for theta(i) = 45 degrees 70% of the fragmentations occurred with only a-x cleavage. For theta(i) = 0 degrees, the average percentage energy transfers to the internal degrees of freedom of the ion and the surface, and the energy remaining in ion translation are 45%, 26%, and 29%. For 45 degrees these percentages are 26%, 12%, and 62%. The percentage energy-transfer to DeltaE(int) for theta(i) = 0 degrees is larger than that reported in previous experiments for collisions of des-Arg(1)-bradykinin with a diamond surface at the same theta(i). This difference is discussed in terms of differences between the model diamond surface used in the simulations and the diamond surface prepared for the experiments.
Collapse
Affiliation(s)
- Kyoyeon Park
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, USA
| | | | | | | |
Collapse
|
8
|
Verbeni R, D'Astuto M, Krisch M, Lorenzen M, Mermet A, Monaco G, Requardt H, Sette F. Energy calibration of a high-resolution inelastic x-ray scattering spectrometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:083902. [PMID: 19044359 DOI: 10.1063/1.2968118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The energy scale of a triple-axis x-ray spectrometer with meV energy resolution based on perfect silicon crystal optics is calibrated, utilizing the most recent determination of the silicon lattice parameter and its thermal expansion coefficient and recording the dispersion of longitudinal acoustic and optical phonons in a diamond single crystal and the molecular vibration mode in liquid nitrogen. Comparison of the x-ray results with previous inelastic neutron and Raman scattering results as well as with ab initio phonon dispersion calculations yields an overall agreement better than 2%.
Collapse
Affiliation(s)
- Roberto Verbeni
- European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Rahaman A, Collins O, Scott C, Wang J, Hase WL. Role of Projectile and Surface Temperatures in the Energy Transfer Dynamics of Protonated Peptide Ion Collisions with the Diamond {111} Surface. J Phys Chem A 2006; 110:8418-22. [PMID: 16821824 DOI: 10.1021/jp057159o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The effects of temperature on energy transfer during collisions of protonated diglycine ions, Gly(2)-H(+), with a diamond {111} surface were investigated by chemical dynamics simulations. The simulations were performed for a collision energy of 70 eV and angle of 0 degrees with respect to the surface normal. In one set of simulations the initial surface temperature, T(surf), was varied from 300 to 2000 K, while the Gly(2)-H(+) vibrational and rotational temperatures were maintained at 300 K. For the second set of simulations the Gly(2)-H(+) vibrational temperature, T(vib), was varied from 300 to 2000 K, keeping both the Gly(2)-H(+) rotational and surface temperatures at 300 K. Increasing either the surface temperature or Gly(2)-H(+) vibrational temperature to values as high as 2000 K has, at most, only a negligible effect on the partitioning of the incident collision energy to the surface and to the vibrational and rotational modes of Gly(2)-H(+). To a good approximation, the initial surface and peptide ion energies are nearly adiabatic during the collisional energy transfer. This adiabaticity of the initial peptide ion energy agrees with experiments (J. Phys. Chem. A 2004, 108, 1). A more quantitative analysis of the effects of T(vib) and T(surf) shows there are small, but noticeable, effects on the energy transfer efficiencies. Namely, increasing the vibrational or surface temperature results in a near-linear decrease in the energy transfer to the degrees of freedom associated with this temperature.
Collapse
Affiliation(s)
- Asif Rahaman
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, USA
| | | | | | | | | |
Collapse
|
10
|
|
11
|
Mazyar OA, Hase WL. Dynamics and Kinetics of Heat Transfer at the Interface of Model Diamond {111} Nanosurfaces. J Phys Chem A 2005; 110:526-36. [PMID: 16405325 DOI: 10.1021/jp0521961] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A molecular dynamics simulation was performed to study the effect of an applied force on heat transfer at the interface of model diamond [111] nanosurfaces. The force was applied to a small, hot nanosurface at 800, 1000, or 1200 K brought into contact with a larger, colder nanosurface at 300 K. The relaxation of the initial nonequilibrium interfacial force occurs on a subpicosecond time scale, much shorter than that required for heat transfer. Heat transfer occurs with exponential kinetics and a rate constant that increases linearly with the interfacial force according to 7 x 10(-4) ps(-1)/nN. This rate constant only increases by at most 10% as the temperature of the hot surface is increased from 800 to 1200 K. Replacing the interfacial H-atoms on both surfaces by D atoms also has a very small effect on the heat transfer. However, if one nanosurface has H atoms on its interface and the other nanosurface's interface has D atoms, then there is a marked 25% decrease in the rate constant for heat transfer. Increasing the size of the hot surface, and, thus, the interfacial contact area, increases the rate of heat transfer but not the rate constant. For the same interfacial force, different anharmonic models for the nanosurfaces' potential energy function give the same heat transfer rate constant. The possibility of quantum effects for heat transfer across the diamond interface is considered.
Collapse
Affiliation(s)
- Oleg A Mazyar
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, USA
| | | |
Collapse
|
12
|
Wang Y, Hase WL, Song K. Direct dynamics study of N-protonated diglycine surface-induced dissociation. Influence of collision energy. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2003; 14:1402-1412. [PMID: 14652188 DOI: 10.1016/j.jasms.2003.08.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A quantum mechanical and molecular mechanical (QM + MM) direct dynamics classical trajectory simulation is used to study energy transfer and fragmentation in the surface-induced dissociation (SID) of N-protonated diglycine, (gly)2H+. The peptide ion collides with the hydrogenated diamond [111] surface. The Austin Model 1 (AM1) semiempirical electronic structure theory is used for the (gly)2H+ intramolecular potential and molecular mechanical functions are used for the diamond surface potential and peptide/surface intermolecular potential. The simulations are performed at collision energies Ei of 30, 50, 70, and 100 eV and collision angle of 0 degrees (perpendicular to the surface). The percent energy transfer to the peptide ion is nearly independent of Ei, while energy transfer to the surface increases with increase in Ei. A smaller percent of the energy remains in peptide translation as Ei is increased. These trends in energy transfer are consistent with previous trajectory simulations of SID. At each Ei the most likely initial pathway leading to fragmentation is rupture of the +H3NCH2-CONHCH2COOH bond. Fragmentation occurs by two general mechanisms. One is the traditional Rice-Ramsperger-Kassel-Marcus (RRKM) model in which the peptide ion is activated by its collision with the surface, "bounces off", and then dissociates after undergoing intramolecular vibrational energy redistribution (IVR). The other mechanism is shattering in which the ion fragments as it collides with the surface. Shattering is the origin of the large increase in number of product channels with increase in Ei, i.e., 6 at 30 eV, but 59 at 100 eV. Shattering becomes the dominant dissociation mechanism at high Ei.
Collapse
Affiliation(s)
- Yanfei Wang
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
| | | | | |
Collapse
|
13
|
Song K, Meroueh O, Hase WL. Dynamics of Cr(CO)[sub 6][sup +] collisions with hydrogenated surfaces. J Chem Phys 2003. [DOI: 10.1063/1.1534094] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
|
14
|
Meroueh SO, Wang Y, Hase WL. Direct Dynamics Simulations of Collision- and Surface-Induced Dissociation of N-Protonated Glycine. Shattering Fragmentation. J Phys Chem A 2002. [DOI: 10.1021/jp020664q] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samy O. Meroueh
- Department of Chemistry and Institute for Scientific Computing, Wayne State University, Detroit, Michigan 48202-3489
| | - Yanfei Wang
- Department of Chemistry and Institute for Scientific Computing, Wayne State University, Detroit, Michigan 48202-3489
| | - William L. Hase
- Department of Chemistry and Institute for Scientific Computing, Wayne State University, Detroit, Michigan 48202-3489
| |
Collapse
|
15
|
Abstract
Classical trajectory simulations are performed to study energy transfer in collisions of protonated triglycine (Gly)(3) and pentaglycine (Gly)(5) ions with n-hexyl thiolate self-assembled monolayer (SAM) and diamond [111] surfaces, for a collision energy E(i) in the range of 10-110 eV and a collision angle of 45 degrees. Energy transfer to the peptide ions' internal degrees of freedom is more efficient for collision with the diamond surface; i.e., 20% transfer to peptide vibration/rotation at E(i) = 30 eV. For collision with diamond, the majority of E(i) remains in peptide translation, while the majority of the energy transfer is to surface vibrations for collision with the softer SAM surface. The energy-transfer efficiencies are very similar for (Gly)(3) and (Gly)(5). Constraining various modes of (Gly)(3) shows that the peptide torsional modes absorb approximately 80% of the energy transfer to the peptide's internal modes. The energy-transfer efficiencies depend on E(i). These simulations are compared with recent experiments of peptide SID and simulations of energy transfer in Cr(CO)(6)(+) collisions with the SAM and diamond surfaces.
Collapse
Affiliation(s)
- Oussama Meroueh
- Contribution from the Department of Chemistry, Wayne State University, Detroit, Michigan 48202-3489
| | | |
Collapse
|
16
|
|
17
|
Karaiskaj D, Thewalt ML, Ruf T, Cardona M, Pohl HJ, Deviatych GG, Sennikov PG, Riemann H. Photoluminescence of isotopically purified silicon: how sharp are bound exciton transitions? PHYSICAL REVIEW LETTERS 2001; 86:6010-6013. [PMID: 11415416 DOI: 10.1103/physrevlett.86.6010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2001] [Indexed: 05/23/2023]
Abstract
We report the first high resolution photoluminescence studies of isotopically pure Si (99.896% (28)Si). New information is obtained on isotopic effects on the indirect band gap energy, phonon energies, and phonon broadenings, which is in good agreement with calculations and previous results obtained in Ge and diamond. Remarkably, the linewidths of the no-phonon boron and phosphorus bound exciton transitions in the (28)Si sample are much narrower than in natural Si and are not well resolved at our maximum instrumental resolution of approximately 0.014 cm(-1). The removal of the dominant broadening resulting from isotopic randomness in natural Si reveals new fine structure in the boron bound exciton luminescence.
Collapse
Affiliation(s)
- D Karaiskaj
- Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Song K, Hase WL. Anharmonic Semiclassical Variational Transition-State Theory Rate Constant Model for H Atom Association with Different Sites on the Diamond {111} Surface. J Phys Chem A 2001. [DOI: 10.1021/jp003826w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kihyung Song
- Department of Chemistry, Korea National University of Education, Chongwon, Chungbuk 363-791, Korea
| | - William L. Hase
- Department of Chemistry and Institute for Scientific Computing, Wayne State University, Detroit, Michigan 48202
| |
Collapse
|
19
|
Rohmfeld S, Hundhausen M, Ley L, Schulze N, Pensl G. Isotope-disorder-induced line broadening of phonons in the Raman spectra of SiC. PHYSICAL REVIEW LETTERS 2001; 86:826-829. [PMID: 11177950 DOI: 10.1103/physrevlett.86.826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2000] [Indexed: 05/23/2023]
Abstract
The width of phonon lines in the Raman spectra of ideal isotopically pure solids is determined by inelastic scattering processes. In solids that contain a mixture of different isotopes of one atomic constituent, elastic scattering due to isotopic mass disorder opens up decay channels that result in additional line broadening. We use different polytypes of SiC with an associated number of Raman active modes in order to experimentally validate the proportionality between linewidth and phonon density of states predicted by a simple elastic scattering theory.
Collapse
Affiliation(s)
- S Rohmfeld
- Institut für Technische Physik, Universität Erlangen-Nürnberg, Erwin-Rommel-Strasse 1, D-91058 Erlangen, Germany
| | | | | | | | | |
Collapse
|
20
|
Collective vibrational effects in hydrogen bonded liquid amides and proteins studied by isotopic substitution. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(00)00477-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
21
|
Dependence of phonon linewidths in semiconductors on temperature and isotopic composition. ACTA ACUST UNITED AC 1998. [DOI: 10.1007/bf03185495] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
22
|
de Sainte Claire P, Hase WL, Song K. Role of the Surface Site in the Kinetics of H Atom Association with Diamond Surfaces. J Phys Chem B 1998. [DOI: 10.1021/jp9711003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - William L. Hase
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202-3489
| | - Kihyung Song
- Department of Chemistry, Korea National University of Education, Chungbuk 363-791, South Korea
| |
Collapse
|
23
|
Abstract
The thermal conductivity of chemical vapour deposition diamond films is controlled by the microstructure, impurity content and carbon double bonds in the films. In high conductivity films, dislocation scattering is dominant at low temperatures, while phonon-phonon scattering limits the conductivity at room temperature. In lower quality films, hydrogen and metal impurities as well as carbon double bonds constrain the conductivity up to room temperature. Significant anisotropies and gradients in the thermal conductivity exist in some films because of their micro structure.
Collapse
|
24
|
Windl W, Pavone P, Strauch D. Second-order Raman spectrum of AlSb from ab initio phonon calculations and evidence for overbending in the LO phonon branch. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:8580-8585. [PMID: 9984534 DOI: 10.1103/physrevb.54.8580] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
25
|
Plekhanov VG. Isotope-induced energy-spectrum renormalization of the Wannier-Mott exciton in LiH crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:3869-3877. [PMID: 9986286 DOI: 10.1103/physrevb.54.3869] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
26
|
Vogelgesang R, Ramdas AK, Rodriguez S, Grimsditch M, Anthony TR. Brillouin and Raman scattering in natural and isotopically controlled diamond. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:3989-3999. [PMID: 9986299 DOI: 10.1103/physrevb.54.3989] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
27
|
Hanzawa H, Umemura N, Nisida Y, Kanda H, Okada M, Kobayashi M. Disorder effects of nitrogen impurities, irradiation-induced defects, and 13C isotope composition on the Raman spectrum in synthetic Ib diamond. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:3793-3799. [PMID: 9986277 DOI: 10.1103/physrevb.54.3793] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
28
|
|
29
|
Song K, Hase WL, Hass KC. Comparison of molecular dynamics and variational transition-state-theory calculations of the rate constant for H-atom association with the diamond {111} surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:2949-2958. [PMID: 9981367 DOI: 10.1103/physrevb.52.2949] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
30
|
Han YJ, Chae HB. Theoretical analysis of the thermal conductivity of diamond in a two-step model. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:27-30. [PMID: 9979560 DOI: 10.1103/physrevb.52.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
31
|
Plekhanov VG. Experimental evidence of strong phonon scattering in isotopical disordered systems: The case of LiHxD1-x. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:8874-8877. [PMID: 9977524 DOI: 10.1103/physrevb.51.8874] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
32
|
Graebner JE, Reiss ME, Seibles L, Hartnett TM, Miller RP, Robinson CJ. Phonon scattering in chemical-vapor-deposited diamond. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:3702-3713. [PMID: 9976649 DOI: 10.1103/physrevb.50.3702] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
33
|
de Sainte Claire P, Barbarat P, Hase WL. Ab initio potential and variational transition state theory rate constant for H‐atom association with the diamond (111) surface. J Chem Phys 1994. [DOI: 10.1063/1.467687] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
34
|
Yamanaka T, Morimoto S, Kanda H. Influence of the isotope ratio on the lattice constant of diamond. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:9341-9343. [PMID: 10009731 DOI: 10.1103/physrevb.49.9341] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
35
|
Etchegoin P, Fuchs HD, Weber J, Cardona M, Pintschovius L, Pyka N, Itoh K, Haller EE. Phonons in isotopically disordered Ge. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:12661-12671. [PMID: 10007636 DOI: 10.1103/physrevb.48.12661] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
36
|
Windl W, Pavone P, Karch K, Schütt O, Strauch D, Giannozzi P, Baroni S. Second-order Raman spectra of diamond from ab initio phonon calculations. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:3164-3170. [PMID: 10008739 DOI: 10.1103/physrevb.48.3164] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
37
|
Ramdas AK, Rodriguez S, Grimsditch M, Anthony TR, Banholzer WF. Effect of isotopic constitution of diamond on its elastic constants: 13C diamond, the hardest known material. PHYSICAL REVIEW LETTERS 1993; 71:189-192. [PMID: 10054405 DOI: 10.1103/physrevlett.71.189] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
38
|
Weber WH, Hass KC, McBride JR. Raman study of CeO2: Second-order scattering, lattice dynamics, and particle-size effects. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:178-185. [PMID: 10006765 DOI: 10.1103/physrevb.48.178] [Citation(s) in RCA: 312] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
39
|
Wei L, Kuo PK, Thomas RL, Anthony TR, Banholzer WF. Thermal conductivity of isotopically modified single crystal diamond. PHYSICAL REVIEW LETTERS 1993; 70:3764-3767. [PMID: 10053956 DOI: 10.1103/physrevlett.70.3764] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
40
|
Olson JR, Pohl RO, Vandersande JW, Zoltan A, Anthony TR, Banholzer WF. Thermal conductivity of diamond between 170 and 1200 K and the isotope effect. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:14850-14856. [PMID: 10005859 DOI: 10.1103/physrevb.47.14850] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
41
|
Fuchs HD, Etchegoin P, Cardona M, Itoh K, Haller EE. Vibrational band modes in germanium: Isotopic disorder-induced Raman scattering. PHYSICAL REVIEW LETTERS 1993; 70:1715-1718. [PMID: 10053366 DOI: 10.1103/physrevlett.70.1715] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
42
|
Litvinchuk AP, Thomsen C, Trofimov IE, Habermeier H, Cardona M. Raman study of YBa2Cu3O7- delta /PrBa2Cu3O7- delta superlattices. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14017-14021. [PMID: 10003471 DOI: 10.1103/physrevb.46.14017] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|