synchrotron – ESISNA

On-surface chemistry: (cyclo)dehydrogenation of PAH catalysed by coinage metal surfaces (Phys. Chem. Chem. Phys. 2017)

paqui 13 diciembre, 2017 1 febrero, 2019Sin categoría

New nanoarchitectures can be built from polycyclic aromatic hydrocarbons (PAH) by exploiting the catalytic properties of some metal surfaces. Actually, this bottom-up approach allows the formation of nanostructures with different dimensionality from the same precursor as a consequence of the diffusion of the PAH on the surface. Thus, by selecting…

Ultrafast atomic diffusion inducing a reversible transition on Sn/Si(111):B

paqui 27 mayo, 2015 27 mayo, 2015Sin categoría

Here, we present experimental and theoretical evidence of a new reversible transition that takes place in Sn/Si(111):B. The system changes from an insulating (2 √ 3 × 2 √ 3)R30º structure at room temperature to a (√ 3 × √ 3)R30º symmetry above 520 K (2 √ 3 and √…