On the Practicability of Sensors Based on Surface-Carboxylated Boron—Carbon Nanotubes

Resumo

A design scheme of nanosized sensors based on BC₃ boron-carbon nanotubes (BCNTs) surface-modified by a carboxy group (surface-carboxylated nanotubes) is considered. The potential usefulness of sur-face-carboxylated nanotubes for detecting alkali metals is analyzed. Interactions of a carboxy group with the nanotube surface and subsequent interactions of the thus-prepared nanosystem with lithium, potassium, and sodium atoms are modeled. Calculations are performed using the molecular cluster model in the frame of the density functional theory (DFT) method. Surface-carboxylated boron-carbon nanotubes are proven to highly sensitive to the chosen atoms.