Modified long-chain alkanes are often used to functionalize graphene and MoS₂ noncovalently, with the goal of controlling the substrate electronic structure or interactions with the environment. Alkyl chain adsorption enthalpy is lower on MoS₂ than on graphite; the decreased molecule–substrate interaction strength suggests utility for monolayer structures that increase stability through other means. Previously, we have found that diyne phospholipid monolayers on HOPG are more stable toward solution processing than monolayers of single-chain amphiphiles. Here, we show that this is also true for assembly on MoS₂, but that the additional stability appears to arise from edge-on adsorption, producing monolayers in which alkyl chains form two stacked layers on the substrate.

中文翻译：

---

边缘吸附多链官能烷烃可稳定MoS ₂ †上的非共价单层

改性长链烷烃通常用于非共价地官能化石墨烯和MoS ₂，目的是控制基质电子结构或与环境的相互作用。烷基链吸附焓在MoS _2上低于在石墨上；降低的分子-底物相互作用强度表明可用于通过其他方式增加稳定性的单层结构。以前，我们发现HOPG上的二炔磷脂单层比单链两亲性单层对溶液处理更稳定。在这里，我们证明了在MoS _2上组装也是如此，但额外的稳定性似乎是由边缘吸附产生的，产生了单层，其中烷基链在基材上形成两个堆叠层。