Sökning: onr:"swepub:oai:research.chalmers.se:9e6ff098-83f0-4dc0-9184-7dacbeed9ece" >
Spatial tuning of t...
Spatial tuning of the metal work function by means of alkanethiol and fluorinated alkanethiol gradients
-
- Venkataraman, Nagaiyanallur V. (författare)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
-
- Zürcher, Stefan (författare)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
-
- Rossi, Antonella (författare)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),Universita degli Studi di Cagliari,University of Cagliari
-
visa fler...
-
- Lee, Seunghwan (författare)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
-
- Naujoks, Nicola, 1977 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Spencer, Nicholas D. (författare)
- Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
-
visa färre...
-
(creator_code:org_t)
- 2009-03-17
- 2009
- Engelska.
-
Ingår i: Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 113:14, s. 5620-5628
- Relaterad länk:
-
https://research.cha...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Surface-chemical gradients composed of self-assembled monolayers (SAM) of deeanethiol (DT) and a partially fluorinated decanethiol (PFDT) on gold, exhibiting gradual changes in surface concentration of one or both components, have been prepared by a simple, controlled-immersion process. Infrared spectroscopic studies on a single-component PFDT gradient indicate a change in average molecular orientation with increasing surface coverage, whereas on a two-component gradient, the orientation remains invariant over the entire length of the gradient. X-ray photoelectron spectroscopic measurements on a single-component PFDT gradient show a systematic decrease in the fluorine (F Is) binding energy with increasing surface coverage, whereas a single-component DT gradient shows an increase in the carbon (C Is) binding energy. In two-component (DT-PFDT) gradients, the molar ratios of the two components at any particular location on the sample surface determine the magnitude of the binding-energy shifts at that location. Such shifts, which are on the order of 1 eV, are shown to be a consequence of work-function changes in the underlying gold upon SAM formation. These results are discussed in light of the surface-potential measurements on a DT-PFDT gradient by Kelvin Probe Force Microscopy and XP spectra acquired on "floating" and grounded samples.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas