A facile and efficient dry transfer technique for two-dimensional Van derWaals heterostructure

Xie Li^{1, 2}, Du Luojun¹, Lu Xiaobo^{1, 2}, Yang Rong^{1, 2, †}, Shi Dongxia^{1, 2}, Zhang Guangyu^{1, 2, 3, 4, ‡}

(color online) Characterizations of a monolayer MoS flake before and after transfer. (a)/(b) OM/AFM image of the monolayer MoS flake before transfer; (c)/(d) OM/AFM image of the monolayer MoS flake after transfer. (e) Raman spectra of the monolayer MoS flake illustrated in panels (a) (black curve) and (c) (red curve); (f) PL spectra of the monolayer MoS flake illustrated in panels (a) (black curve) and (c) (red curve). (f) Transfer characteristics of a monolayer MoS FET based on the flake illustrated in panel (c). Inset: OM image of the device.