He, J;
Armstrong, J;
Cong, P;
Menagen, B;
Igaher, L;
Beale, AM;
Etgar, L;
(2020)
Affecting an Ultra-High Work Function of Silver.
Angewandte Chemie: International Edition
, 59
(12)
pp. 4698-4704.
10.1002/anie.201912293.
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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.
Type: | Article |
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Title: | Affecting an Ultra-High Work Function of Silver |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1002/anie.201912293 |
Publisher version: | https://doi.org/10.1002/anie.201912293 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | doping metals, Kelvin probe, redox trap effect, silver, work function |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
URI: | https://discovery.ucl.ac.uk/id/eprint/10092496 |
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