Theoretical studies on the adsorption, sensibility, and reactivity of a boron nitride nanocage decorated with Au, Cu, Ni, Os, Pt, and Zn metals as a biosensor material were carried out for the adsorption of carboplatin by applying the density functional theory computation at the B3LYP-GD3BJ/def2svp level of theory. All the optimized structures, as well as the calculations as regards the studied objective including electronic properties, geometry optimization parameters, adsorption energy studies, natural bond orbital analysis, topology studies, sensor mechanistic parameters, and thermodynamic properties (ΔG and ΔH), were investigated herein. As a result, the noticeable change in the energy gap of the studied surfaces when interacting with carboplatin accounted for the surfaces’ reactivity, stability, conductivity, work function, and overall adsorption ability, implying that the studied decorated surfaces are good sensor materials for sensing carboplatin. Furthermore, the negative adsorption energies obtained for interacting surfaces decorated with Cu, Ni, Os, and Zn suggest that the surface has a superior ability to sense carboplatin as chemisorption was seen. Substantially, the geometric short adsorption bond length after adsorption, thermodynamically spontaneous reactions, and acceptable sensor mechanism results demonstrate that the investigated surfaces have strong sensing characteristics for sensing carboplatin.

Theoretical examination of hydroxyurea adsorption capabilities toward the cyclodextrin surface for proper drug delivery systems was carried out utilizing DFT simulations. The study aims to assess the efficacy of doped cyclodextrin (doped with boron, nitrogen, phosphorus, and sulfur atoms) in increasing its stability and efficiency in intermolecular interactions, hence facilitating optimal drug delivery. The adsorption energies were found to follow a decreasing order of B

Herein, the aim of this work was to investigate the intermolecular interactions between polyoxometalate (POMs) as a drug-delivery system with nitrosourea at different sites: CH 3, COOH, NH 2, NO 2 and OCH 3 using density functional theory (DFT) at the M062X/LanL2DZ level of theory. The result showed that, the lowest bond lengths recorded for the adsorbate and the nanocage were 1.40Å, 1.64Å, 1.40Å and 1.57Å for NU/ POM(CH 3 ), NU/POM(NH 2 ), NU/POM(NO 2 ) and NU/POM(OCH 3 ) respectively. The NU/POM(NO 2 ) system had the highest adsorption energy in the three phases: À 32.039, À 26.95, and À 29.38 kcal/mol for gas, solvent, and benzene respectively and the lowest was shown in NU/POM(OCH 3 ) with À 14.10, À 10.33, À 12.29 kcal/mol. The energy gap was found to be the highest in NU/POM(NO 2 ) with 5.061eV followed by NU/POM and NU/ POM(COOH) 4.020eV and 4.003eV respectively. It has been clearly shown that NU/POM(NO 2 ) density peak in the Highest occupied molecular orbital and Lowest unoccupied molecular orbital (HOMO/LUMO) plot was above 5 and this go in line with the electronic properties possessing a stable nature. In the NBO analysis, after adsorption of the nitrosourea (NU), the NU/ POM(NO 2 ) system recorded the highest energy with 1309.42 kcal/mol and the lowest in NU/POM(OCH 3 ) with 921.75 kcal/mol. The system with NO 2 possess more stability, chemical hardness, electrophilicity index and strong interactions. It has a better surface interaction than other compounds found in Nitrosourea.