10.1021/acsami.7b11055.s001
Eunji Lee
Eunji
Lee
Armin VahidMohammadi
Armin
VahidMohammadi
Barton C. Prorok
Barton C.
Prorok
Young Soo Yoon
Young Soo
Yoon
Majid Beidaghi
Majid
Beidaghi
Dong-Joo Kim
Dong-Joo
Kim
Room
Temperature Gas Sensing of Two-Dimensional Titanium Carbide (MXene)
American Chemical Society
2017
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
2017-09-27 00:00:00
Journal contribution
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.