Thermodynamic properties of nanoparticles during new particle formation events in the atmosphere of North China Plain - Zhijun* Wu; Nan, M; Größ, J; Kecorius, S.; Lu, K. D.; Shang, D. J.; Y. Wang; Y.S. Wu; L.M. Zeng; Min* Hu; Wiedensohler, A.; Zhang, Y. H. (Atmos. Res., 2017)