**Author details**

Nguyen Nang Dinh

Although the ammonia gas response of P3GC sensors at 50 ppm (*η* = 2.9%) is lower compared to PEDOT: PSS-based sensors (*η* = 4.0% [28]), when one needs to monitor ammonia gas in a humid environment, P3HT/rGO/CNT (namely P3GC) sensors would be preferred. This is because signals obtained from measurements on PEDOT: PSS-based sensors would be undis-

tinguishable between ammonia gas and water vapor.

**Figure 15.** Humidity dependence of resistance of the PEGC (a) and P3GC films (b).

**Figure 14.** Comparison of the RH% sensitivity of PEGC (a) and P3GC sensors (b).

98 Nanocomposites - Recent Evolutions

Address all correspondence to: dinhnn@vnu.edu.vn

University of Engineering and Technology, Vietnam National University Hanoi, Hanoi, Vietnam
