Adsorption of oriented carborane dipoles on a silver surface

0462205 - FZÚ 2017 RIV DE eng J - Journal Article
Vetushka, Aliaksi - Bernard, L. - Guseva, O. - Bastl, Zdeněk - Plocek, Jiří - Tomandl, Ivo - Fejfar, Antonín - Baše, Tomáš - Schmutz, P.
Adsorption of oriented carborane dipoles on a silver surface.
Physica Status Solidi B. Roč. 253, č. 3 (2016), 591-600. ISSN 0370-1972. E-ISSN 1521-3951
R&D Projects: GA MŠMT(CZ) LM2011026; GA ČR GB14-37427G; GA ČR GAP205/10/0348
Institutional support: RVO:68378271 ; RVO:61388955 ; RVO:61388980 ; RVO:61389005
Keywords : carborane * Kelvin probe force microscopy * self-assembled monolayers * time-of-flight secondary ion mass spectrometry * X-ray photoelectron spectroscopy
Subject RIV: BM - Solid Matter Physics ; Magnetism; CF - Physical ; Theoretical Chemistry (UFCH-W); CA - Inorganic Chemistry (UACH-T)
Impact factor: 1.674, year: 2016

Modification of surfaces with self-assembled mono-layers (SAMs) represents a powerful and innovative tool for adjusting physical and chemical properties of surfaces. The adsorption of isomeric molecules with relatively strong and oppositely oriented molecular dipoles on a flat silver surface is investigated in order to adjust its work function in a desired way. Time-offlight secondary ion mass spectroscopy and X-ray photoelectron spectroscopy are used to prove that both isomers (i) chemisorb on a silver surface as thiolates and (ii) exhibit comparable surface densities. Densely packed surfaces of both SAMs are additionally investigated by electrochemical impedance spectroscopy, and effective surface passivation is observed. Co-deposition of both derivatives is shown to enable effective and fine adjustment of the surface work function value within a range of 1V.

Permanent Link: http://hdl.handle.net/11104/0261701