Investigation of surface energies in spin crossover nanomaterials: the role of surface relaxations
Literature Information
William Nicolazzi, Férial Terki, Gábor Molnár, Azzedine Bousseksou
We analyse in detail the role of surface relaxations on the spin transition phenomenon through an Ising-like model solved in the inhomogeneous mean field approach. We show the surface relaxation tends to decrease the energy cost of missing bonds. Cooperative phenomena are also affected, leading to an asymmetric hysteresis loop. The underlying mechanisms are investigated by calculating thermodynamics excess quantities. Far from the spin transition, the contribution of surface relaxations to the excess internal energy, entropy and free energy is negligible, but their role becomes substantial around the transition temperature.
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![(3R,4aR,7aS,9aR,10S,11R,13aR,13bS,15aS,15bR)-3,11-Dihydroxy-10-(hydroxymethyl)-4,4,7a,10,13a,15b-hexamethyl-1,2,3,4,4a,7,7a,8,9,9a,10,11,12,13,13a,13b,14,15,15a,15b-icosahydro-5H-naphtho[2',1':4,5]cyc
lohepta[1,2-a]naphthalen-5-one structure (3R,4aR,7aS,9aR,10S,11R,13aR,13bS,15aS,15bR)-3,11-Dihydroxy-10-(hydroxymethyl)-4,4,7a,10,13a,15b-hexamethyl-1,2,3,4,4a,7,7a,8,9,9a,10,11,12,13,13a,13b,14,15,15a,15b-icosahydro-5H-naphtho[2',1':4,5]cyc
lohepta[1,2-a]naphthalen-5-one structure](https://static.chemtradehub.com/structs/538/53800-21-8-9f18.webp)

![5-Bromo-3-isopropyl-1H-pyrrolo[2,3-b]pyridine structure 5-Bromo-3-isopropyl-1H-pyrrolo[2,3-b]pyridine structure](https://static.chemtradehub.com/structs/125/1256819-54-1-8620.webp)
