A flexible and selective CO gas sensor was fabricated from Au-functionalized two-dimensional (2D) WS₂ nanoflakes on polyamide substrate. Au-functionalized 2D WS₂ nanoflakes gas sensors fabricated on polyamide can be operated under self-heating mode (1-5 V) with good selectivity to CO gas. Gas sensors fabricated on polyamide not only showed flexibility, but also demonstrated good stability and repeatability. In particular, even after 1000 times tilting, the optimized gas sensor could detect low concentrations of CO gas. The underlying sensing mechanism is discussed in detail. The results indicated the feasibility of realization of low-energy consumption and flexible gas sensors using Au-functionalization on 2D WS₂ nanoflakes.

一种柔性且选择性的CO气体传感器，是在聚酰胺基底上由Au功能化的二维（2D）WS ₂纳米薄片制成的。可以在聚酰胺上制造的Au功能化2D WS ₂纳米片状纳米片状气体传感器在自热模式（1-5 V）下运行，对CO气体具有良好的选择性。用聚酰胺制造的气体传感器不仅显示出灵活性，而且还显示出良好的稳定性和可重复性。特别是，即使经过1000次倾斜，优化的气体传感器也可以检测到低浓度的CO气体。详细讨论了潜在的感应机制。结果表明在2D WS ₂纳米薄片上使用Au功能化实现低能耗和灵活的气体传感器的可行性。