Various LIG-based electrochemical sensors. (a) A chemically modified LIG-based flexible ultrasensitive electrochemical glucose sensor. Reprinted with permission from Ref. [106], Copyright 2021, Elsevier B.V. (b) Heteroatom-doped LIG-based electrochemical dopamine sensors. Reprinted with permission from Ref. [107], Copyright 2021, Elsevier B.V. (c) IR and UV LIG-based dopamine electrochemical sensors. Reprinted with permission from Ref. [19], Copyright 2021, Wiley-VCH. (d) The performance of LIG-based NO2 sensors at room temperature. (e) The performance of LIG-based NO2 sensors with Joule-heating at 150 °C. Reprinted with permission from Ref. [67], Copyright 2021, Elsevier B.V.