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Adsorption of zwitterionic assemblies on Si(111)-7 x 7: A joint tunneling spectroscopy and ab initio study

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: M El Garah, F Palmino, F Chérioux, S Melinte, B Hackens, M Silveira Rodrigues, D Bogdan, E Duverger

Editorial: Phys Rev B, 85, p.035425, 2012.


The adsorption of zwitterionic molecules on Si(111)-7×7 substrates has been probed by scanning tunneling microscopy and spectroscopy and studied via density-functional-theory calculations. Experimental results obtained at room and low temperatures revealed the reconstruction of Si(111)-7×7 half-cells with molecular constructs accommodating three zwitterions. A structural model for the inscription of the Si(111)-7×7 half-cell with zwitterionic edifices is proposed and the nature of the interactions between the molecular assemblies and the surface is established thanks to joint experimental data and simulations.

Cuvinte cheie: STM, DFT, Si(111), zwitterions