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Saleh G, Xu C, Sanvito S. Silver Tarnishing Mechanism Revealed by Molecular Dynamics Simulations. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901630] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gabriele Saleh
- School of PhysicsAMBER and CRANN instituteTrinity College Dublin College Green Dublin 2 Ireland
- Istituto Italiano di Tecnologia Via Morego 30 Genova Italy
| | - Chen Xu
- Nokia Bell Labs 600 Mountain Avenue Murray Hill NJ USA
| | - Stefano Sanvito
- School of PhysicsAMBER and CRANN instituteTrinity College Dublin College Green Dublin 2 Ireland
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Saleh G, Xu C, Sanvito S. Silver Tarnishing Mechanism Revealed by Molecular Dynamics Simulations. Angew Chem Int Ed Engl 2019; 58:6017-6021. [PMID: 30866112 DOI: 10.1002/anie.201901630] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Indexed: 11/08/2022]
Abstract
The mechanism of silver-oxygen and silver-sulfur reactions is revealed by means of molecular dynamics simulations, performed with reactive force fields purposely built and extensively tested against quantum-chemical results. Different reaction mechanisms and rates for Ag-O and Ag-S emerge. This study solves the long-lasting question why silver exposed to the environment is strongly vulnerable to sulfur corrosion (tarnishing) but hardly reacts with O2 , despite the thermodynamic prediction that both oxide and sulfide should form. The reliability of the simulation results is confirmed by the agreement with a multitude of experimental results from the literature.
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Affiliation(s)
- Gabriele Saleh
- School of Physics, AMBER and CRANN institute, Trinity College Dublin, College Green, Dublin, 2, Ireland.,Istituto Italiano di Tecnologia, Via Morego 30, Genova, Italy
| | - Chen Xu
- Nokia Bell Labs, 600 Mountain Avenue, Murray Hill, NJ, USA
| | - Stefano Sanvito
- School of Physics, AMBER and CRANN institute, Trinity College Dublin, College Green, Dublin, 2, Ireland
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Montemore MM, van Spronsen MA, Madix RJ, Friend CM. O2 Activation by Metal Surfaces: Implications for Bonding and Reactivity on Heterogeneous Catalysts. Chem Rev 2017; 118:2816-2862. [DOI: 10.1021/acs.chemrev.7b00217] [Citation(s) in RCA: 230] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew M. Montemore
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St, Cambridge, Massachusetts 02138, United States
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, Massachusetts 02138, United States
| | - Matthijs A. van Spronsen
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St, Cambridge, Massachusetts 02138, United States
| | - Robert J. Madix
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, Massachusetts 02138, United States
| | - Cynthia M. Friend
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford St, Cambridge, Massachusetts 02138, United States
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, Massachusetts 02138, United States
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Staaks D, Yang X, Lee KY, Dhuey SD, Sassolini S, Rangelow IW, Olynick DL. Low temperature dry etching of chromium towards control at sub-5 nm dimensions. NANOTECHNOLOGY 2016; 27:415302. [PMID: 27606715 DOI: 10.1088/0957-4484/27/41/415302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Patterned chromium and its compounds are crucial materials for nanoscale patterning and chromium based devices. Here we investigate how temperature can be used to control chromium etching using chlorine/oxygen gas mixtures. Oxygen/chlorine ratios between 0% and 100% and temperatures between -100 °C and +40 °C are studied. Spectroscopic ellipsometry is used to precisely measure rates, chlorination, and the thickness dependence of n and k. Working in the extremes of oxygen content (very high or very low) and lower temperatures, we find rates can be controlled to nanometers per minute. Activation energies are measured and show that etch mechanisms are both temperature and oxygen level dependent. Furthermore, we find that etching temperature can manipulate the surface chemistry. One surprising consequence is that at low oxygen levels, Etching rates increase with decreasing temperature. Preliminary feature-profile studies show the extremes of temperature and oxygen provide advantages over commonly used room temperature processing conditions. One example is with higher ion energies at -100 °C, where etching products deposit.
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Affiliation(s)
- Daniel Staaks
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, 94720, USA. Ilmenau University of Technology, Dept. of Micro- and Nanoelectronic Systems, D-98684, Germany
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Lončarić I, Alducin M, Juaristi JI. Molecular dynamics simulation of O2 adsorption on Ag(110) from first principles electronic structure calculations. Phys Chem Chem Phys 2016; 18:27366-27376. [DOI: 10.1039/c6cp05199e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
State of the art simulations show that the physisorption state could be important for O2/Ag(110) adsorption.
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Affiliation(s)
- Ivor Lončarić
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU)
- 20018 Donostia-San Sebastián
- Spain
| | - M. Alducin
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU)
- 20018 Donostia-San Sebastián
- Spain
- Donostia International Physics Center DIPC
- 20018 Donostia-San Sebastián
| | - J. I. Juaristi
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU)
- 20018 Donostia-San Sebastián
- Spain
- Donostia International Physics Center DIPC
- 20018 Donostia-San Sebastián
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Roy S, Mujica V, Ratner MA. Chemistry at molecular junctions: Rotation and dissociation of O2 on the Ag(110) surface induced by a scanning tunneling microscope. J Chem Phys 2013; 139:074702. [DOI: 10.1063/1.4818163] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kleyn AW. Probing Chemical Dynamics at Surfaces. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20010190103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Katz G, Zeiri Y, Kosloff R. Nonadiabatic charge transfer processes of oxygen on metal surfaces. Isr J Chem 2005. [DOI: 10.1560/tff4-y5jm-3lpq-d2fj] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Savio L, Gerbi A, Vattuone L, Rocca M, Vecchiocattivi F, Cappelletti D, Pirani F. Heterolitic photolysis of O2 on Ag(100). Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.01.112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zeiri Y. Collision induced desorption by “hot” atoms: Desorption of O2 from Ag(110). J Chem Phys 2000. [DOI: 10.1063/1.480921] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Barth J, Zambelli T, Wintterlin J, Ertl G. Hot precursors in the adsorption of molecular oxygen on Ag(110). Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00330-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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de Mongeot F, Cupolillo A, Valbusa U, Rocca M. O2 dissociation on Ag(001): the role of kink sites. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00381-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Buatier de Mongeot F, Rocca M, Cupolillo A, Valbusa U, Kreuzer HJ, Payne SH. Sticking and thermal desorption of O2 on Ag(001). J Chem Phys 1997. [DOI: 10.1063/1.473406] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F. Buatier de Mongeot
- CFSBT-CNR and INFM, Dipartimento di Fisica dell’Universita di Genova, V. Dodecaneso, 33-16146 Genova, Italy
| | - M. Rocca
- CFSBT-CNR and INFM, Dipartimento di Fisica dell’Universita di Genova, V. Dodecaneso, 33-16146 Genova, Italy
| | - A. Cupolillo
- CFSBT-CNR and INFM, Dipartimento di Fisica dell’Universita di Genova, V. Dodecaneso, 33-16146 Genova, Italy
| | - U. Valbusa
- CFSBT-CNR and INFM, Dipartimento di Fisica dell’Universita di Genova, V. Dodecaneso, 33-16146 Genova, Italy
| | - H. J. Kreuzer
- Department of Physics, Dalhousie University, Halifax, N.S. B3H 3J5 Canada
| | - S. H. Payne
- Department of Physics, Dalhousie University, Halifax, N.S. B3H 3J5 Canada
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Vattuone L, Rocca M, Boragno C, Valbusa U. Initial sticking coefficient of O2 on Ag(110). J Chem Phys 1994. [DOI: 10.1063/1.468127] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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