SwePub - sökning: onr:"swepub:oai:DiVA.org:uu-23...

Numrering	Referens	Omslagsbild	Hitta
1.	Chakarov, D V, et al. (författare) Photos induced desorption and intercalation of potassium atoms deposited on graphite(0001) 1996 Ingår i: Applied Surface Science. - 0169-4332 .- 1873-5584. ; 106, s. 186-192 Tidskriftsartikel (refereegranskat)abstract In addition to the photodesorption phenomenon previously observed for single K atoms from a graphite surface covered with a monolayer of potassium we present new results related to the photon stimulated interaction of potassium with graphite, which concerns alternative routes for energy relaxation of the photo excited K adatoms: photoinduced intercalation. The desorption yield has a threshold at h omega approximate to 3 eV and a maximum at h omega(max) approximate to 4.9 eV, Polarization measurements indicate a substrate-mediated mechanism. The coverage dependence suggests that only the ionic 2D, K-phase is photo active. The proposed mechanism includes attachment of photo-generated hot electrons to the K 4s adsorbate resonance of energy E(res). Assuming an analogous excitation process we discuss different mechanisms for the K photo intercalation and possible applications of the photon stimulated doping of carboneous materials at low temperature.

Chakarov, D V, et al. (författare)
Photos induced desorption and intercalation of potassium atoms deposited on graphite(0001)
1996
Ingår i: Applied Surface Science. - 0169-4332 .- 1873-5584. ; 106, s. 186-192
Tidskriftsartikel (refereegranskat)abstract
- In addition to the photodesorption phenomenon previously observed for single K atoms from a graphite surface covered with a monolayer of potassium we present new results related to the photon stimulated interaction of potassium with graphite, which concerns alternative routes for energy relaxation of the photo excited K adatoms: photoinduced intercalation. The desorption yield has a threshold at h omega approximate to 3 eV and a maximum at h omega(max) approximate to 4.9 eV, Polarization measurements indicate a substrate-mediated mechanism. The coverage dependence suggests that only the ionic 2D, K-phase is photo active. The proposed mechanism includes attachment of photo-generated hot electrons to the K 4s adsorbate resonance of energy E(res). Assuming an analogous excitation process we discuss different mechanisms for the K photo intercalation and possible applications of the photon stimulated doping of carboneous materials at low temperature.

Träfflista för sökning "onr:"swepub:oai:DiVA.org:uu-235940" "