Self-healing, antibacterial and metal-ion sensing coatings with nanoparticles were developed using layer-by-layer (LbL) self-assembly technique via host-guest interaction. The coatings consist of MoS₂ nanosheets, beta-cyclodextrin (β-CD)-modified poly (ethylenimine) (PEI) and adamantane (AD)-modified poly (acrylic acid) (PAA). Damages to conventional coatings results in cracking and affects the coatings’ ability to maintain antibacterial and sensing qualities. The prepared MoS₂/β-CD-PEI/AD-PAA self-healing coatings are not only able to greatly suppress bacterial adhesion and have excellent antibacterial property, particularly under UV light irradiation, but also have a longtime service time. Moreover, the self-healing coatings first applied the fluorescence quenching for detecting heavy metals (Co²⁺). Fluorescence spectra demonstrated that a linear relationship existed between the fluorescence intensity and the Co²⁺ concentration with 0 ∼ 0.1 ug/mL and the detection limit of Co²⁺ is 0.018 mg/mL. Therefore, the nanoparticle multilayer polyelectrolyte hybrid coatings have a potential application in food industries.

使用层-层（LbL）自组装技术通过宿主-客体相互作用开发了具有纳米粒子的自修复，抗菌和金属离子感应涂层。涂层由MoS ₂纳米片，β-环糊精（β-CD）改性的聚（乙烯亚胺）（PEI）和金刚烷（AD）改性的聚丙烯酸（PAA）组成。常规涂层的损坏会导致开裂，并影响涂层保持抗菌和感官品质的能力。准备好的MoS ₂/β-CD-PEI/ AD-PAA自修复涂料不仅能够极大地抑制细菌粘附并具有出色的抗菌性能（尤其是在紫外线照射下），而且使用寿命长。此外，自修复涂层首先应用荧光猝灭来检测重金属（Co ²⁺）。荧光光谱表明，荧光强度和钴之间存在线性关系²⁺ 0〜0.1微克/ mL的浓度和Co的检测极限²⁺是0.018毫克/毫升。因此，纳米颗粒多层聚电解质杂化涂层在食品工业中具有潜在的应用。