عنوان مجله
|
JOURNAL OF MOLECULAR LIQUIDS
|
چکیده
|
Motivated by earlier experimental and theoretical studies on the potential of different nanostructures for
drug delivery, the adsorption and electrical sensitivity of pristine, Al- and Ga-embedded (8,0) boron
nitride nanotubes (BNNTs) to a rizatriptan (RZ) molecule are explored using dispersion-corrected density
functional density calculations. The RZ molecule is shown to be weakly adsorbed on pristine BNNT, with a
modest adsorption energy of 0.46 eV and only a minor impact on its electronic properties. The replace-
ment of a B atom with an Al or Ga promotes the reactivity of the BNNT toward the RZ molecule, as evi-
denced by calculated adsorption energies and charge-transfer values. Once the RZ molecule is introduced
onto the BNNTs, the band gap of the tubes narrows. However, the amount of reduction in band gap values
of Al- or Ga- embedded BNNT is more pronounced than that of pristine tube. As solvent effects are
included, the desorption times of RZ from the surface of BNNTs are expected to be shortened. The influ-
ence of surface charge on the adsorption process of RZ molecules, as well as curvature effects, is thor-
oughly investigated. Overall, the high sensitivity, reasonable adsorption energies, and fast desorption
suggest that Al- and Ga-embedded BNNTs might be served as effective drug delivery systems for RZ
|