Scalable preparation of water-soluble ink of few-layered WSe<sub>2</sub> nanosheets for large-area electronics

Scalable preparation of water-soluble ink of few-layered WSe₂ nanosheets for large-area electronics

Xian Guoyu^{1, 2}, Zhang Jianshuo^{2, 3}, Liu Li¹, Zhou Jun², Liu Hongtao², Bao Lihong², Shen Chengmin², Li Yongfeng³, Qin Zhihui^{1, §}, Yang Haitao^{2, ‡}

(a) Photograph of exfoliated WSe₂ nanosheets dispersed in aqueous NaDC solution. (b) TEM and (c) AFM images of WSe₂ nanosheets, the inset pattern in (c) is the cross-sectional height profile. (d) HAADF STEM image of WSe₂ nanosheets, the FFT pattern is shown in the inset. (e) The signal intensity of atoms along the red line in (d) showing the same contrast value, corresponding to the lattice constant of 0.33 nm.