title: Size-dependent thermodynamic properties of metallic nanowires.
abstract: Analytical models for size-dependent melting temperature Tm(D), melting enthalpy DeltaHm(D), and surface energy gammasv(D) of metallic nanowires have been proposed in terms of the unified nanothermodynamical model where D denotes the diameter of nanowire. As D decreases, Tm(D), DeltaHm(D), and gammasv(D) functions are found to decrease almost with the same size-dependent trend. Due to the inclusion of the effect of dimensionality, the developed model can be applied to other low-dimensional systems. It is found that the ratio of depression of these thermodynamic parameters for spherical nanoparticle, nanowire, and thin film is 3:2:1 when D is large enough (>20h with h being the atomic diameter). The validity of the model is verified by the data of experiments, molecular dynamics simulations, and other theoretical models.
authors.affiliation: National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing, P. R. China.
authors.forename: H M
authors.initials: HM
authors.lastname: Lu
authors.forename: F Q
authors.initials: FQ
authors.lastname: Han
authors.forename: X K
authors.initials: XK
authors.lastname: Meng