Anisotropic fluid flows in black phosphorus nanochannels.

Area of Science:

• Materials Science
• Nanotechnology
• Computational Chemistry

Background:

• Two-dimensional materials like black phosphorus (BP) are increasingly used in practical applications.
• Understanding solid-liquid interactions at the nanoscale is crucial for developing new technologies.

Purpose of the Study:

• To investigate the flow behavior of n-dodecane (C12) molecules in black phosphorus (BP) nanochannels using molecular dynamics simulations.
• To elucidate the mechanisms behind anisotropic liquid flow in nanochannels.

Main Methods:

• Molecular dynamics (MD) simulations were performed to study n-dodecane confined in BP nanochannels.
• Analysis included velocity profiles, friction factors, and molecular orientations.

Main Results:

• A significant difference in flow velocity was observed between armchair and zigzag directions of BP nanochannels.
• n-dodecane flowed 9-fold faster along the zigzag direction compared to the armchair direction.
• Molecular orientation and interfacial friction explained the observed anisotropic flow.

Conclusions:

• The orientation of n-dodecane molecules (parallel to flow in zigzag, perpendicular in armchair) dictates flow behavior.
• This study provides critical insights into anisotropic liquid flow in nanochannels, relevant for nanotechnology applications.