7 research outputs found
Prototypical Organic–Oxide Interface: Intramolecular Resolution of Sexiphenyl on In<sub>2</sub>O<sub>3</sub>(111)
The performance of
an organic semiconductor device is critically determined by the geometric
alignment, orientation, and ordering of the organic molecules. Although
an organic multilayer eventually adopts the crystal structure of the
organic material, the alignment and configuration at the interface
with the substrate/electrode material are essential for charge injection
into the organic layer. This work focuses on the prototypical organic
semiconductor para-sexiphenyl (6P) adsorbed on In<sub>2</sub>O<sub>3</sub>(111), the thermodynamically most stable surface of the material
that the most common transparent conducting oxide, indium tin oxide,
is based on. The onset of nucleation and formation of the first monolayer
are followed with atomically resolved scanning tunneling microscopy
and noncontact atomic force microscopy (nc-AFM). Annealing to 200
°C provides sufficient thermal energy for the molecules to orient
themselves along the high-symmetry directions of the surface, leading
to a single adsorption site. The AFM data suggests an essentially
planar adsorption geometry. With increasing coverage, the 6P molecules
first form a loose network with a poor long-range order. Eventually,
the molecules reorient into an ordered monolayer. This first monolayer
has a densely packed, well-ordered (2 × 1) structure with one
6P per In<sub>2</sub>O<sub>3</sub>(111) substrate unit cell, that
is, a molecular density of 5.64 × 10<sup>13</sup> cm<sup>–2</sup>
Chemical Identification of Single Atoms in Heterogeneous III–IV Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
Chemical identification of individual atoms in mixed In–Sn chains grown on a Si(100)-(2 × 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished
Chemical Identification of Single Atoms in Heterogeneous III–IV Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
Chemical identification of individual atoms in mixed In–Sn chains grown on a Si(100)-(2 × 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished
Chemical Identification of Single Atoms in Heterogeneous III–IV Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
Chemical identification of individual atoms in mixed In–Sn chains grown on a Si(100)-(2 × 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished
Chemical Identification of Single Atoms in Heterogeneous III–IV Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
Chemical identification of individual atoms in mixed In–Sn chains grown on a Si(100)-(2 × 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished
Chemical Identification of Single Atoms in Heterogeneous III–IV Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
Chemical identification of individual atoms in mixed In–Sn chains grown on a Si(100)-(2 × 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished
Chemical Identification of Single Atoms in Heterogeneous III–IV Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
Chemical identification of individual atoms in mixed In–Sn chains grown on a Si(100)-(2 × 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished