where d is particle diameter and 2/d the interface curvature, δ is the change in interface conductance with curvature, and G 0 is the interface conductance at the zero-curvature limit (i.e., lim 2/d→0 ) which should match the conductance of the corresponding planar surface. Similarly, we found that at low and high heat flux the thermal interface conductance of the spherical AuNPs increased linearly with the interface curvature in each heating regime as per Equation (Figure ,d); note that for both wetting conditions we averaged the two G values for the 10 nm AuNP in the low heat flux regime for the linear fit. For the moderate wetting case, the δ values were similar in both heating regimes (∼ 0.04 W m -1 K -1 ), and were consistent with values reported by Tascini et al. for nanoparticles with full wetting (δ ∼ 0.023-0.105 W m -1 K -1 ). However, the corresponding values of G 0 were different due to the increase in G with heat flux. G 0 for the fit to the AuNP data in the low-heat flux regime (126.5 MW m -2 K -1 ) was also higher than the thermal interface conductance of the planar gold interface (∼110 MW m -2 K -1 ) in that heat flux regime. However, given that the heat fluxes aren't exactly the same across the interfaces and that we averaged the two G values for the 10 nm AuNP in the low heat flux regime, as well as the limited number of AuNP sizes available for the linear fit, some error in the estimate of G 0 is to be expected. In the poor wetting case, the δ values in the two heating regimes (∼ 0.021 and ∼ 0.03 W m -1 K -1 ) were lower than in the moderate wetting case, consistent with values reported by Tascini et al. for nanoparticles with partial (δ ∼ 0.012-0.023 W m -1 K -1 ) and full wetting (δ ∼ 0.023-0.105 W m -1 K -1 ). In this case, the planar surface G values ∼ 25 -26 MW m -2 K -1 fall with the range of the G 0 estimates (27.3 and 23.5 MW m -2 K -1 for low and high heat flux, respectively).