[1] [1] Novoselov K S, Geim A K, Morozov S V, et al. Electric field effect in atomically thin carbon films [J].Science,2004, 306(5696):666.

[2] [2] Li X, Wang X, Zhang L, et al. Chemically derived, ultrasmooth graphene nanoribbon semiconductors [J].Science,2008, 319(5867):1229.

[3] [3] Stankovich S, Dikin D A, Dommett G H B, et al. Graphene-based composite materials[J].Nature,2006,442 (7100):282-286.

[4] [4] Hernandez Y, Nicolosi V, Lotya M, et al. High-yield production of graphene by liquid-phase exfoliation of graphite[J]. Nature Nanotechnology,2008,3:563.

[5] [5] Bonaccorso F, Sun Z, Hasan T, et al. Graphene photonics and optoelectronics[J]. Nature Photonics,2010,4:611.

[6] [6] Lotya M, Hernandez Y, King P J, et al. Liquid phase production of graphene by exfoliation of graphite in surfactant/water solutions[J].Journal of the American Chemical Society,2009,131(10):3611-3620.

[7] [7] Liu Z, Liu Q, Huang Y, et al. Organic photovoltaic devices based on a novel acceptor material: graphene [J].Advanced Materials,2008,20(20):3924-3930.

[8] [8] Wan X, Chen K, Xu J. Interface engineering for CVD graphene: current status and progress[J].Small, 2014,10 (22):4443-4454.

[9] [9] Chen K, Wan X, Wen J, et al. Electronic properties of MoS2-WS2 heterostructures synthesized with two-step lateral epitaxial strategy[J].ACS Nano,2015,9(10):9868-9876.

[10] [10] Ogilvie S P, Large M J, Fratta G, et al. Considerations for spectroscopy of liquid-exfoliated 2D materials: emerging photoluminescence of N-methyl-2-pyrrolidone[J].Scientific Reports,2017,7(1):16706.

[11] [11] Song X, Hu J, Zeng H. Two-dimensional semiconductors: recent progress and future perspectives[J].Journal of Materials Chemistry C,2013,1(17):2952-2969.

[12] [12] Yang H, Hernandez Y, Schlierf A, et al. A simple method for graphene production based on exfoliation of graphite in water using 1-pyrenesulfonic acid sodium salt[J].Carbon,2013,53:357-365.

[13] [13] Jang J H, Rangappa D, Kwon Y U, et al. Direct preparation of 1-PSA modified graphene nanosheets by supercritical fluidic exfoliation and its electrochemical properties[J].Journal of Materials Chemistry,2011,21(10):3462-3466.

[14] [14] McManus D, Vranic S, Withers F, et al. Water-based and biocompatible 2D crystal inks for all-inkjet-printed heterostructures[J].Nature Nanotechnology,2017,12:343.

[15] [15] Gordon H R. Can the Lambert-Beer law be applied to the diffuse attenuation coefficient of ocean water? [J].Limnology and Oceanography,1989,34(8):1389-1409.

[16] [16] Bruls W A G, Slaper H, Van Der Leun J C, et al. transmission of human epidermis and stratum corneum as a function of thickness in the ultraviolet and visible wavelengths[J].Photochemistry and Photobiology,1984,40(4):485-494.

[17] [17] Bolin D W, King R P, Klosterman E W. A simplified method for the determination of chromic oxide (Cr2O3) when used as an index substance[J].Science,1952,116(3023):634-635.

[18] [18] Yang H, Withers F, Gebremedhn E, et al. Dielectric nanosheets made by liquid-phase exfoliation in water and their use in graphene-based electronics[J].2D Materials,2014,1(1):011012.

[19] [19] Kelly A G, Hallam T, Backes C, et al. All-printed thin-film transistors from networks of liquid-exfoliated nanosheets[J]. Science,2017,356(6333):69-73.