# Molecular Dynamics of the Silica-Water Interface
> Explore ab initio MD simulations of the silica-water interface. Learn about Density Functional Theory (DFT), atom density profiles, and H-bond analysis.

Tags: molecular-dynamics, silica-water-interface, computational-chemistry, dft, ab-initio-md, surface-science, nanotechnology
## The Silica-Water Interface: Molecular Dynamics Insights
* This research, conducted at KAUST, investigates how liquid water interacts with ̢β-cristobalite surfaces at the molecular level using ab initio MD simulations.

## Theoretical Framework and Methodology
* **DFT & Electronic Structure:** Utilizes Density Functional Theory (DFT) with the PBE functional, DZVP-GTH-BLYP basis set, and GTH pseudo-potentials.
* **Tools:** Simulated using the CP2K program and Quickstep DFT module, running on a 64-core CRESCO supercomputer.
* **Simulation Setup:** Two structures were modeled (sparse water with 96 atoms and dense water with 117 atoms) using NVT ensemble at 300K for 25 ps.

## Key Findings
* **Water Layering:** Atom density profiles show water organizes into distinct layers near the surface. In dense models (Structure B), strong adsorption occurs at ~2Å.
* **H-Bonding (RDF):** Radial Distribution Function analysis confirms a strong H-bond network, particularly with out-of-plane silanols (peaks at 1.5–2.0Å).
* **Industrial Impact:** Understanding these interfaces is critical for semiconductors ($226B market), medical devices, and anti-corrosion technology.
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