Wafer-Scale Two-Dimensional MoS<sub>2</sub> Layers Integrated on Cellulose Substrates Toward Environmentally Friendly Transient Electronic Devices Changhyeon Yoo Md Golam Kaium Luis Hurtado Hao Li Sushant Rassay Jinwoo Ma Tae-Jun Ko Sang Sub Han Mashiyat Sumaiya Shawkat Kyu Hwan Oh Hee-Suk Chung Yeonwoong Jung 10.1021/acsami.0c06198.s001 https://acs.figshare.com/articles/journal_contribution/Wafer-Scale_Two-Dimensional_MoS_sub_2_sub_Layers_Integrated_on_Cellulose_Substrates_Toward_Environmentally_Friendly_Transient_Electronic_Devices/12360995 We explored the feasibility of wafer-scale two-dimensional (2D) molybdenum disulfide (MoS<sub>2</sub>) layers toward futuristic environmentally friendly electronics that adopt biodegradable substrates. Large-area (> a few cm<sup>2</sup>) 2D MoS<sub>2</sub> layers grown on silicon dioxide/silicon (SiO<sub>2</sub>/Si) wafers were delaminated and integrated onto a variety of cellulose-based substrates of various components and shapes in a controlled manner; examples of the substrates include planar papers, cylindrical natural rubbers, and 2,2,6,6-tetramethylpiperidine-1-oxyl-oxidized cellulose nanofibers. The integrated 2D layers were confirmed to well preserve their intrinsic structural and chemical integrity even on such exotic substrates. Proof-of-concept devices employing large-area 2D MoS<sub>2</sub> layers/cellulose substrates were demonstrated for a variety of applications, including photodetectors, pressure sensors, and field-effect transistors. Furthermore, we demonstrated the complete “dissolution” of the integrated 2D MoS<sub>2</sub> layers in a buffer solution composed of baking soda and deionized water, confirming their environmentally friendly transient characteristics. Moreover, the approaches to delaminate and integrate them do not demand any chemicals except for water, and their original substrates can be recycled for subsequent growths, ensuring excellent chemical benignity and process sustainability. 2020-05-22 22:14:54 Wafer-Scale Two-Dimensional MoS 2 Layers Integrated field-effect transistors cellulose-based substrates 2 D MoS 2 layers pressure sensors baking soda MoS 2 Proof-of-concept devices 2 D layers chemical integrity Cellulose Substrates molybdenum disulfide process sustainability Environmentally Friendly Transient Electronic Devices cm 2 chemical benignity buffer solution deionized water