C59Si on the monohydride Si(100):H-(2 x 1) surface

Area of Science:

• Materials Science
• Surface Science
• Computational Chemistry

Background:

• Fullerene molecules are of interest for surface functionalization.
• Controllable anchoring of fullerenes on semiconductor surfaces remains a challenge.

Purpose of the Study:

• To investigate the potential of using silicon (Si) atoms within fullerene structures for enhanced surface anchoring.
• To evaluate the stability and feasibility of adsorbing C59Si molecules onto a silicon surface.

Main Methods:

• Ab initio total energy calculations using density functional theory (DFT).
• Analysis of binding energies for C59Si and C60 on a Si surface.

Main Results:

• The Si atom in C59Si forms a strong bond with Si surface atoms, yielding a binding energy of approximately 2.1 eV.
• This binding is ~1.4 eV stronger compared to a C60 molecule adsorbed similarly.
• Adsorption via a (C59Si)2 dimer intermediate is energetically favorable, with an exothermic process of ~0.2 eV.

Conclusions:

• C59Si offers a promising route for controllable fullerene adsorption on Si surfaces.
• The enhanced binding energy suggests improved stability for functionalized silicon surfaces.
• The proposed method provides a viable pathway for creating novel fullerene-based materials.