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Our First-principles Full-Potential Density Functional Theory (DFT)calculations show that a monolayer of ZnS (ML-ZnS), which is predicted to adopta graphene-like planar honeycomb structure with a direct band gap, undergoesstrain-induced modifications in its structure and band gap when subjected toin-plane homogeneous biaxial strain ($\delta$). ML-ZnS gets buckled forcompressive strain greater than 0.92%; the buckling parameter $\Delta$ (= 0.00\AA\, for planar ML-ZnS) linearly increases with increasing compressive strain($\Delta = 0.435$ \AA \,at $\delta = - 5.25$%). A tensile strain of 2.91% turnsthe direct band gap of ML-ZnS into indirect. Within our considered strainvalues of $|\delta| < 6%$, the band gap shows linearly decreasing (non-linearlyincreasing as well as decreasing) variation with tensile (compressive) strain.These predictions may be exploited in future for potential applications instrain sensors and other nano-devices such as the nano-electromechanicalsystems (NEMS).

Tailoring the structural and electronic properties of graphene-like ZnS monolayer using biaxial strain