  We present a parameterization of the Stillinger-Weber potential to describe
the interatomic interactions within single-layer MoS2 (SLMoS2). The potential
parameters are fitted to an experimentally-obtained phonon spectrum, and the
resulting empirical potential provides a good description for the energy gap
and the crossover in the phonon spectrum. Using this potential, we perform
classical molecular dynamics simulations to study chirality, size, and strain
effects on the Young's modulus and the thermal conductivity of SLMoS2. We
demonstrate the importance of the free edges on the mechanical and thermal
properties of SLMoS2 nanoribbons. Specifically, while edge effects are found to
reduce the Young's modulus of SLMoS2 nanoribbons, the free edges also reduce
the thermal stability of SLMoS2 nanoribbons, which may induce melting well
below the bulk melt temperature. Finally, uniaxial strain is found to
efficiently manipulate the thermal conductivity of infinite, periodic SLMoS2.
