Serine adsorption through different functionalities on the B₁₂N₁₂ and Pt-B₁₂N₁₂ nanocages.

Area of Science:

• Computational Chemistry
• Materials Science
• Surface Science

Background:

• Fullerenes, particularly boron-nitrogen (B12N12) cages, are explored for their unique electronic properties.
• Serine, an amino acid, plays crucial roles in biological systems and its interaction with surfaces is of interest.
• Understanding adsorption mechanisms is key to designing novel functional materials.

Purpose of the Study:

• To investigate the adsorption behavior of serine in neutral and zwitterionic forms on pure and platinum-decorated B12N12 fullerenes.
• To determine the binding energies and preferred adsorption sites of serine on these fullerene structures.
• To analyze the impact of serine adsorption on the electronic properties, specifically conductivity, of the fullerenes.

Main Methods:

• Density Functional Theory (DFT) calculations were employed to model the adsorption systems.
• Time-Dependent Density Functional Theory (TD-DFT) was utilized for electronic property analysis.
• Binding energies were calculated for various functional groups of serine (hydroxyl, carboxyl, amine) interacting with the fullerenes.

Main Results:

• The zwitterionic form of serine exhibited less stable binding on the pure B12N12 fullerene compared to the neutral form.
• Chemisorption was most stable when serine's amine group interacted with the Pt-decorated B12N12 fullerene.
• Serine adsorption altered the energy band gap of the fullerenes, influencing their conductivity.

Conclusions:

• Platinum decoration significantly enhances serine adsorption on B12N12 fullerenes, with the amine group being the primary interaction site.
• The adsorption process modifies the electronic properties of the fullerenes, suggesting potential for electronic device applications.
• This research provides foundational insights into the interaction of amino acids with functionalized fullerene nanomaterials.