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Shen Q, Wu J, Zhou F, Song Y, Dong W, Wang X, Wang T, Yang X. A molecular beam-surface apparatus for quantum state-resolved adsorption studies. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2022; 93:013201. [PMID: 35104941 DOI: 10.1063/5.0049178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Understanding the microscopic mechanism of molecule-surface interaction is of great importance in the study of chemical dynamics. Yet, it remains challenging to experimentally acquire quantum state resolved results, particularly the results related to different degrees of freedom of the reactants. Here, we report the design and performance of a new apparatus for molecule-surface dynamics studies, which enable the measurement of quantum state-resolved adsorption. A continuous narrow-linewidth infrared laser source and molecular beam unit were developed and employed in this new apparatus to achieve independent control on different degrees of freedom (translation, vibration, and rotation) of the molecule. Preliminary results on hydrogen and hydrogen chloride adsorption on the Cu (111) surface were also presented.
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Affiliation(s)
- Qiqi Shen
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Jiawei Wu
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Feiyue Zhou
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Yunlong Song
- Department of Chemistry, College of Science, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Wenrui Dong
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Xingan Wang
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Tao Wang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
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Bohamud T, Reutzel M, Dürr M, Höfer U. Dynamics of proton transfer reactions on silicon surfaces: OH-dissociation of methanol and water on Si(001). J Chem Phys 2019; 150:224703. [PMID: 31202240 DOI: 10.1063/1.5092804] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The reaction dynamics of methanol and water on Si(001) were investigated by means of molecular beam techniques. The initial sticking probability s0 was determined as a function of the kinetic energy of the incoming molecules, Ekin, and surface temperature, Ts. For both, methanol and water, a nonactivated reactional channel was observed; the dynamics were found to be determined by the reaction into the datively bonded intermediate state. A low conversion barrier was deduced for the conversion from this intermediate into the final state. It is attributed to the reaction mechanism, which proceeds via proton transfer from the OH-group of the datively bonded molecules to a Si surface atom. Despite this low conversion barrier, adsorption into the intermediate and further reaction via proton transfer were found to be largely decoupled.
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Affiliation(s)
- T Bohamud
- Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany
| | - M Reutzel
- Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany
| | - M Dürr
- Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany
| | - U Höfer
- Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität Marburg, D-35032 Marburg, Germany
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Affiliation(s)
- Helen Chadwick
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland;,
| | - Rainer D. Beck
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland;,
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Lipponer M, Dürr M, Höfer U. Adsorption dynamics of tetrahydrofuran on Si(0 0 1) studied by means of molecular beam techniques. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Reaction Dynamics of Molecular Hydrogen on Silicon Surfaces: Importance of Lattice Degrees of Freedom. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/978-3-642-32955-5_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Wachowicz E, Kiejna A. Structure and energetics changes during hydrogenation of 4H-SiC{0001} surfaces: a DFT study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:385801. [PMID: 22945033 DOI: 10.1088/0953-8984/24/38/385801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The changes in the atomic and electronic structure of Si- and C-terminated hexagonal SiC{0001} surfaces resulting from on-surface and subsurface hydrogen adsorption have been studied within the density functional theory framework. Hydrogen coverages ranging from a submonolayer to one monolayer were considered. Our results show that a monolayer of adsorbed H almost completely suppresses the relaxation of the SiC surface atomic layers. On both terminations H binds strongly to the surface and the binding is about 2 eV stronger in on-surface sites than subsurface. Hydrogen binding to the C-terminated surface varies very little with coverage and is distinctly stronger than to the Si-terminated surface.
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Affiliation(s)
- Elwira Wachowicz
- Institute of Experimental Physics, University of Wrocław, Wrocław, Poland.
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Chapter 16 Growth and Etching of Semiconductors. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/s1573-4331(08)00016-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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