Fig. 8: Thermal expansion and piezoelectric effect for generating homogeneous biaxial strain. | Light: Science & Applications

Fig. 8: Thermal expansion and piezoelectric effect for generating homogeneous biaxial strain.

From: Strain engineering of 2D semiconductors and graphene: from strain fields to band-structure tuning and photonic applications

Fig. 8

a Schematic of the differential thermal expansion induced homogeneous biaxial tensile strain in monolayer WSe2, whose thermal expansion coefficient is larger than that of the substrate121. b Schematic diagram of MoS2 sandwiched between a piezoelectric PMN-PT substrate and a graphene layer serving as an electrode76. c Schematics of scotch-tape-exfoliated graphene on a PMN-PT substrate (upper panel) and an electromechanical device applying an in-plane biaxial strain to graphene (lower panel)97. Reprinted a with permission from ref. 121. Copyright (2017) Springer Nature. Reprinted b with permission from ref. 76. Copyright (2013) American Chemical Society. Reprinted c with permission from ref. 97. Copyright (2010) American Chemical Society

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