Affecting an Ultra-High Work Function of Silver.
Angew Chem Int Ed Engl
; 59(12): 4698-4704, 2020 03 16.
Article
em En
| MEDLINE
| ID: mdl-31923344
ABSTRACT
An ultra-high increase in the WF of silver, from 4.26 to 7.42â
eV, that is, an increase of up to circa 3.1â
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 4â
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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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Israel