ZnS and CdS counterparts of biphenylene lattice: A density functional theory prediction

Autor(es)

Laranjeira, Jose A. S. ; Abdullahi, Yusuf Z. ; Ersan, Fatih ; Sambrano, Julio R.

• Tipo de documento: Artigo Científico
• Fonte: COMPUTATIONAL AND THEORETICAL CHEMISTRY; v. 1235, p. 8-pg., 2024-03-30.

Resumo

This study presents four novel inorganic structures based on the biphenylene network (BPN): planar BPN-ZnS (pBPN-ZnS) and BPN-CdS (p-BPN-CdS) and buckled BPN-ZnS (b-BPN-ZnS) and BPN-CdS (b-BPN-CdS). Cohesive energy analyses reveal that structural buckling enhances stability, and a perturbation is necessary to obtain planar lattices. Phonon dispersion and ab initio molecular dynamics (AIMD) simulations demonstrated the dynamical and thermal stabilities. ZnS-based structures exhibited more pronounced charge accumulation and depletion than CdS. All evaluated structures are ultra-wideband gap semiconductors, with band gap energy values of 4.33, 5.34, 3.59, and 4.30 eV (at HSE06 level) for p-BPN-ZnS, b-BPN-ZnS, p-BPN-CdS, and b-BPN-CdS, respectively. p-BPN-ZnS demonstrated the highest Young modulus (Y x /Y y = 25.295/34.874 N/m), followed by pBPN-CdS (Y x /Y y = 15.286/21.339 N/m). On the other hand, b-BPN-ZnS and b-BPN-CdS exhibit lower Young Modulus, Y x /Y y = 4.135/14.709 and 11.842/8.218 N/m, respectively. Notably, b-BPN-ZnS displayed a particular characteristic, a negative Poisson ratio (nu x /nu y = -0.008/-0.030), being an auxetic material. This report is expected to stimulate both theoretical and experimental researchers in the prediction and development of new inorganic materials based on the biphenylene network. (AU)

• Processo FAPESP: 22/03959-6 - Estruturas bidimensionais para armazenamento de energia e sensores de gases: a teoria direcionada a experimentalistas e para a divulgação científica
• Beneficiário: Julio Ricardo Sambrano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 22/16509-9 - Simulações computacionais de heteroestruturas baseadas em dicalcogenetos metálicos de transição, MXenos e novos alótropos do carbono
• Beneficiário: José Artigas dos Santos Laranjeira
• Modalidade de apoio: Bolsas no Brasil - Doutorado