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He J, Armstrong J, Cong P, Menagen B, Igaher L, Beale AM, Etgar L, Avnir D. Affecting an Ultra‐High Work Function of Silver. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jin He
- Institute of Chemistry and The Center for Nanoscience and NanotechnologyThe Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Jeff Armstrong
- ISIS FacilityRutherford Appleton Laboratory Harwell Oxford Didcot Oxfordshire OX11 0QX UK
| | - Peixi Cong
- Department of ChemistryUniversity College of London Gordon Street London WC1H 0AJ UK
- Research Complex at HarwellRutherford Appleton Laboratory Harwell Oxford Didcot Oxfordshire OX11 0FA UK
| | - Barak Menagen
- Institute of Chemistry and The Center for Nanoscience and NanotechnologyThe Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Lior Igaher
- Institute of Chemistry and The Center for Nanoscience and NanotechnologyThe Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Andrew M. Beale
- Department of ChemistryUniversity College of London Gordon Street London WC1H 0AJ UK
- Research Complex at HarwellRutherford Appleton Laboratory Harwell Oxford Didcot Oxfordshire OX11 0FA UK
| | - Lioz Etgar
- Institute of Chemistry and The Center for Nanoscience and NanotechnologyThe Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - David Avnir
- Institute of Chemistry and The Center for Nanoscience and NanotechnologyThe Hebrew University of Jerusalem Jerusalem 9190401 Israel
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He J, Armstrong J, Cong P, Menagen B, Igaher L, Beale AM, Etgar L, Avnir D. Affecting an Ultra-High Work Function of Silver. Angew Chem Int Ed Engl 2020; 59:4698-4704. [PMID: 31923344 DOI: 10.1002/anie.201912293] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/21/2019] [Indexed: 11/06/2022]
Abstract
An ultra-high increase in the WF of silver, from 4.26 to 7.42 eV, that is, an increase of up to circa 3.1 eV is reported. This is the highest WF increase on record for metals and is supported by recent computational studies which predict the potential ability to affect an increase of the WF of metals by more than 4 eV. We achieved the ultra-high increase by a new approach: Rather than using the common method of 2D adsorption of polar molecules layers on the metal surface, WF modifying components, l-cysteine and Zn(OH)2 , were incorporated within the metal, resulting in a 3D architecture. Detailed material characterization by a large array of analytical methods was carried out, the combination of which points to a WF enhancement mechanism which is based on directly affecting the charge transfer ability of the metal separately by cysteine and hydrolyzed zinc(II), and synergistically by the combination of the two through the known Zn-cysteine finger redox trap effect.
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Affiliation(s)
- Jin He
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Jeff Armstrong
- ISIS Facility, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire, OX11 0QX, UK
| | - Peixi Cong
- Department of Chemistry, University College of London, Gordon Street, London, WC1H 0AJ, UK.,Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire, OX11 0FA, UK
| | - Barak Menagen
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Lior Igaher
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Andrew M Beale
- Department of Chemistry, University College of London, Gordon Street, London, WC1H 0AJ, UK.,Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire, OX11 0FA, UK
| | - Lioz Etgar
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - David Avnir
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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