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Alessandro Molle responded: Al 2 O 3 encapsulation of Xenes was engineered to minimizeornullifytheeffectonthesiliceneandmoregenerallyontheXenes. Alessandro Molle answered: The DFT simulation is reported as a conceptual experiment to sustain the experimental picture resulting from the XPS and Raman spectroscopy evidence of silicene stabilization aer encapsulation. Claudia Backes, Szymon Bartus, Cinzia Casiraghi, Andrea Ferrari, Ali Reza Kamali, Miroslav Kol ' ibal, Vimal Kumar, Alessandro Molle, Andrea Oyarzun, Vincenzo Palermo, Amretashis Sengupta, Alessandro Silvestri and Hua Zhang DOI: 10.1039/D1FD90006D Alessandro Silvestri opened the discussion of the paper by Alessandro Molle: Can the encapsulation technique described in the paper affect the chemicalphysical properties of the 2D material encapsulated? Thisfact stems from the details of the Al 2 O 3 growth, namely Al 2 O 3 is sequentially grown aer silicene,developingrstthroughAlsinglelayergrowthfollowedbyAl-O 2 co-deposition at room temperature, eventually ending up with a nal Al 2 O 3 layer with controlled thickness. [Extracted from the article]

To address "why we need entropy for new carbon discovery", entropy (not limited to thermodynamic entropy) is the only way to connect every carbon material. We name the Z-axis "meso-entropy world" because I want the readers to understand that "the entropy world is a dynamic world", because the Z-axis goes from the "start" to the "end" and right now in this paper (DOI: 10.1039/ c9fd00115h) it is located in the "meso" region, and because specic kinds of material (e.g. carbons) can be distinguished by their entropy values. In the case of carbon materials, for example, the entropy of amorphous carbon is larger than that of graphite and diamond since diamond's crystal structure is more ordered than that of graphite and amorphous carbon. And, we are developing higher or lower entropy sp 2 -carbons (e.g.,C 82,C 222, azulene containing PAHs,grain boundariesof graphene, etc.)every day, unfortunately randomly and independently. The lucky thing is more and more different kinds of entropies are arising, e.g., vibrational entropy, rotational entropy, conguration entropy, information Discussions FaradayDiscussions Thisjournalis©TheRoyalSocietyofChemistry2021 Faraday Discuss.,2021, 227,141-162 | 151 entropy, etc., and can be applied to understand the relationships within the rich carbon family. [Extracted from the article]