“…Chemical adsorption, on the other hand, is characterized by negative adsorption energy ( E ads value > 1), which denotes covalent and strong interaction (based on magnitude) between the adsorbent and adsorbate and is called chemisorption. 42 The calculated adsorption energy shows that 5HIAA can adsorb well on AINNT, and its respective P, S, and SI-doped surfaces were studied. As observed in the interaction of 5HIAA adsorption in the interior of the cage, 5HIAA@P in ALN, had an E ads value of −0.009 eV, while 5HIAA@s had an E value of 0.038 eV; 5HIAA@Si had a value of 0.044 eV, which shows chemisorption between the surfaces and adsorbate.…”