10.1021/acsami.0c06198.s001 Changhyeon Yoo Changhyeon Yoo Md Golam Kaium Md Golam Kaium Luis Hurtado Luis Hurtado Hao Li Hao Li Sushant Rassay Sushant Rassay Jinwoo Ma Jinwoo Ma Tae-Jun Ko Tae-Jun Ko Sang Sub Han Sang Sub Han Mashiyat Sumaiya Shawkat Mashiyat Sumaiya Shawkat Kyu Hwan Oh Kyu Hwan Oh Hee-Suk Chung Hee-Suk Chung Yeonwoong Jung Yeonwoong Jung Wafer-Scale Two-Dimensional MoS<sub>2</sub> Layers Integrated on Cellulose Substrates Toward Environmentally Friendly Transient Electronic Devices American Chemical Society 2020 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 2020-05-22 22:14:54 Journal contribution 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.