Room Temperature Gas Sensing of Two-Dimensional Titanium Carbide (MXene) Eunji Lee Armin VahidMohammadi Barton C. Prorok Young Soo Yoon Majid Beidaghi Dong-Joo Kim 10.1021/acsami.7b11055.s001 https://acs.figshare.com/articles/journal_contribution/Room_Temperature_Gas_Sensing_of_Two-Dimensional_Titanium_Carbide_MXene_/5488591 Wearable gas sensors have received lots of attention for diagnostic and monitoring applications, and two-dimensional (2D) materials can provide a promising platform for fabricating gas sensors that can operate at room temperature. In the present study, the room temperature gas-sensing performance of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> nanosheets was investigated. 2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> (MXene) sheets were synthesized by removal of Al atoms from Ti<sub>3</sub>AlC<sub>2</sub> (MAX phases) and were integrated on flexible polyimide platforms with a simple solution casting method. The Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> sensors successfully measured ethanol, methanol, acetone, and ammonia gas at room temperature and showed a p-type sensing behavior. The fabricated sensors showed their highest and lowest response toward ammonia and acetone gas, respectively. The limit of detection of acetone gas was theoretically calculated to be about 9.27 ppm, presenting better performance compared to other 2D material-based sensors. The sensing mechanism was proposed in terms of the interactions between the majority charge carriers of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> and gas species. 2017-09-27 00:00:00 solution  casting method room Temperature Gas 2 D material-based sensors majority charge carriers 2 D Ti 3 C 2 T x Two-Dimensional Titanium Carbide acetone gas Ti 3 C 2 T x sensors Wearable gas sensors Ti 3 C 2 T x nanosheets Ti 3 C 2 T x Ti 3 AlC 2 MAX room temperature room temperature gas-sensing performance