| 초록 |
We firstly demonstrated superior chemical sensing performance of BP comparing with graphene and MoS2. The dynamic sensing results onto various target gases showed that BP possessed about ten to twenty times higher molar response factor (~1870 %mmole-1) than that of MoS2 and graphene sensors. Moreover, the response time of BP was about 40 times faster than the other 2D materials having ppb level sensing ability of target analytes, which marks one of the most sensitive sensing performances compared to previously reported 2D materials based gas sensors. In addition, only BP showed highly selective response to NO2 molecules and unresponsive to oxygen functionalized molecules, while MoS2 and graphene have similar response to all the chemical compounds non-selectively. Theoretical calculations based on density functional theory (DFT) indicate that the superior sensing performance of the BP can be attributed to the higher molecular adsorption energy compared to the other 2D materials. With these superior properties in hand, it is anticipated that BP can lead the nano-sensing devices in the nearby future. |
