Calorimetric investigation of the Au-Pb system

Au-Seeded CsPbI3 Nanowire Optoelectronics via Exothermic Nucleation

“…Also, the ΔH of the Au−Pb alloys as a function of composition are calculated at different temperatures (Figure 1b). 20 As the contact surface between dissimilar atoms changes with compositions, the nonsymmetrical concentration dependence of ΔH is hence observed. Anyway, the ΔH values of Au−Pb alloys are negative (ΔH < 0) over the whole composition range and work well with temperatures up to 1123 K, which means the Au−Pb eutectic alloying is a spontaneous exothermic process.…”

“…This negative value is mainly because of the distinct work function difference between Au (ϕ* = 5.10–5.47 eV) and Pb (ϕ* = 4.25 eV), which generates a significant negative contribution to the formation energy. Also, the Δ H of the Au–Pb alloys as a function of composition are calculated at different temperatures (Figure b) . As the contact surface between dissimilar atoms changes with compositions, the nonsymmetrical concentration dependence of Δ H is hence observed.…”