Fig. 4: Domes as probes for resolving 2D material / substrate and interlayer vdWs adhesion energy.
From: Nanoscale engineering of non-uniform biaxially strained domes
a Schematic of adhesion energy i) when a 2D material is above a substrate material and ii) the interlayer adhesion energy between 2D materials and adjacent basal planes. b i) AFM cross sections of a dome during inflation and deflation via the bulging technique. ii) hm versus R of different domes during inflation and deflation. The upper and lower dashed lines correspond to solutions for separation and adhesion, respectively. iii) A comparison between the works of separation and adhesion for different domes and SiO2 substrate65. c Interlayer adhesion energy of removing 1 L, 2 L or 3 L from the remaining bulk WS2 crystal formed by proton irradiated domes. Experimental and DFT calculations show a similar trend that interlayer adhesion increases with layer number97. d hm/R for different dome number (top) and hm versus R (bottom) of different proton irradiated domes formed on different substrates. For example, MoS2/WS2 refers to MoS2 domes grown on top of a WS2 substrate88. e Interlayer adhesion energy for homo- and hetero-structure domes formed by proton irradiated domes88. Figure b reprinted (adapted) from David Lloyd, Xinghui Liu, Narasimha Boddeti, Lauren Cantley, Rong Long, Martin L. Dunn, and J. Scott Bunch Nano Letters 2017 17 (9), 5329-5334. Copyright 2017 American Chemical Society. Figures d and e reprinted (figure) with permission from Blundo, Elena and Yildirim, Tanju and Pettinari, Giorgio and Polimeni, Antonio, Phys. Rev. Lett., 127, 046101, 2021.] Copyright (2021) by the American Physical Society.
