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Review Article

Nanoelectromechanical Sensors Based on Suspended 2D Materials

Table 1

Comparison of the most relevant properties of suspended 2D materials. Reported results are obtained from experiments on suspended membranes as well as 2D materials on various substrates.

Young’s modulus (GPa)Poisson’s ratioFracture strain (%)Mobility (cm2/Vs)Piezoresistive gauge factorOptical bandgap (eV)

Highest-quality exfoliated graphene800-1100 [17, 38]0.11-0.2 [3942]0.3-30 [17, 42]200000 (suspended) [43]2-6 [3234]No bandgap
CVD polycrystalline graphene1000 [44]0.13-0.2 [3941]2 [45]350000 (supported) [46]2-6 [3234]No bandgap
h-BN [47]0.21 [48]17 [49]Dielectric5.9 [50]
MoS2 [51]0.27 [52]6-11 [53]73 (supported) [54] (monolayer) [31]
(bilayer) [31]
1.9 (monolayer)
1-1.6 (multilayer) [55, 56]
MoSe2177.2 [57]0.23 [57]2.55 [57]1800 (theory) [58]1.59 [59]
PtSe2Mostly <15; 210 [60]Up to (few layer) [6]1.2-1.6 (monolayer)
0.2-0.8 (bilayer)
None (multilayer) [61, 62]
WS2272 [63]0.21 [64]214 [65]14 [37]2 [66]
WSe2167.3 [67]0.19 [64]7.3 [67]3000 (theory) [58]
Black phosphorus46-276 [68]0.4 [68]8-17 [68]10000 (supported) [69]69-460 [70, 71]