**3.3 Molybdenum disulfide (MoS2)**

MoS2 have been extensively applied in sensor, optical, energy device, and electronics. For example, tactile sensor was fabricated from MoS2 for electronic skin applications. MoS2 owns its outstanding properties such as good optical transparency, mechanical flexibility, and high gauge factor compared with conventional strain gauges [21]. Wang et al. studied the conductivity and thermal stability of the MoS2/polyaniline (PANI) nanocomposites with increasing the amount of MoS2 for supercapacitor application. The results showed that the MoS2/PANI of 38 wt% exhibited specific capacitance up to 390 F/g and retained capacitance of 86% over

1000 cycles [22]. MoS2 was also synthesized to form hydrangea-like flowers or clusters comprising MoS2 nanosheet for high-dielectric and electrical energy storage applications [23]. Moreover, Yin et al. synthesized the biocompatible nanoflowers between MoS2 with polyethylene glycol (PEG) for antibacterial applications [24].
