Abstract
We made a helium atom beam scattering (HAS) apparatus to study the thermal dynamics of adsorbed organic molecules on a surface. The apparatus had an angular resolution of 6° and energy resolutions of 20%, with an incident energy of E i = 63 meV. We measured the thermal stability of acetic acid (CH 3 -COOH) and succinic acid (HOOC-CH 2 -CH 2 -COOH) structures on a Cu(1 1 0) using the DW-plot technique (the temperature variation of intensity of the He beam specularly reflected from the surface). We found that the desorption temperatures derived from DW-plots are 540 K for low-coverage acetate, 550 K for c(2 × 2) acetate and 590 K at succinate. The desorption temperature of succinate is higher than acetate, which is interpreted by a larger number of carboxylates in one molecule.
| Original language | English |
|---|---|
| Pages (from-to) | 183-188 |
| Number of pages | 6 |
| Journal | Applied Surface Science |
| Volume | 241 |
| Issue number | 1-2 SPEC. ISS. |
| DOIs | |
| Publication status | Published - 2005 Feb 28 |
| Externally published | Yes |
Keywords
- Carboxylic acid
- Copper
- Helium atomic beam scattering
- Temperature programmed desorption
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films