Synthesis of MoS₂ Nanochains by Electrospinning for Ammonia Detection at Room Temperature

MoS₂ nanochains were successfully prepared via facile electrospinning and a hydrothermal process. The morphology of MoS₂ nanochains was evaluated by field emission scanning electron microscopy and high-resolution transmission electron microscopy. A slurry composed of the MoS₂ nanochains was coated on a silver electrode to detect ammonia. The detection range of ammonia was between 25 and 500 ppm. MoS₂ nanochains offered outstanding sensing response, repeatable reproducibility, and excellent selectivity with a detection limit of 720 ppb. The responsiveness of MoS₂ nanochains to ammonia remained unchanged for 1 week.