Predicted contact angles between each pristine tholin sample and solid C₂H₆ condensate, grouped by experimental setup. Bars are color-coded by energy source: blue for plasma discharge (JHU/PHAZER and ARC/COSmIC) and orange for UV irradiation (JHU/PHAZER and UNI/PAC). Horizontal error bars represent 1σ uncertainties propagated from the measured surface energy components. The vertical dashed line at 30° marks the upper boundary of the contact angle range considered favorable for efficient CCN activity (J. E. McDonald 1964; P. C. Mahata & D. J. Alofs 1975; X. Yu et al. 2021; J. Li et al. 2022). The light blue shaded region (θ < 30°) highlights the CCN-favorable zone. Samples are grouped by experimental setup, with italic labels indicating the setup name at the bottom right of each group. Predicted contact angles with solid and liquid CH₄ and liquid N₂ are 0° for all samples; these complete-wetting cases are therefore not shown. For liquid C₂H₆, all plasma samples also yield θ = 0°; nonzero predicted angles are found only for three UV samples: 31﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩76 ± 2﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩85 (sample 12, JHU/PHAZER UV), 6﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩38 ± 6﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩38 (sample 28, UNI/PAC UV), and 6﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩29 ± 6﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩29 (sample 32, UNI/PAC UV).