Formation of aqueous secondary organic aerosol (aqSOA) at the air – liquid interface recently has attracted a lot of attention in atmospheric chemistry. The discrepancies in mass distributions, aerosol oxidative capacity, liquid water content, hygroscopic growth of aerosols, and formation of clouds and fogs suggest that interfacial chemistry play a more important role than previously deemed. However, detailed mechanisms at the air–water interface remain unclear owing to the lack of comprehensive understanding that underpins complicated interfacial phenomena, which are not easily measurable from field campaigns, laboratory measurements, or computational simulations. This review highlights relevant and recent technical advancement employed to study aqSOA encompassing spectroscopy and mass spectrometry. The current knowledge on the aqSOA processes is digested with an emphasis on recent research of interfacial aqSOA formation including laboratory studies and model simulations. Finally, future directions of the interfacial chemistry are recommended for field and laboratory studies as well as theoretical efforts to resolve interfacial challenges in atmospheric chemistry.

气-液界面处二次有机气溶胶（aqSOA）的形成最近引起了大气化学的广泛关注。质量分布、气溶胶氧化能力、液态水含量、气溶胶的吸湿生长以及云雾形成的差异表明，界面化学的作用比以前认为的更重要。然而，由于缺乏支持复杂界面现象的全面理解，空气-水界面的详细机制仍不清楚，这些现象不容易通过现场活动、实验室测量或计算模拟来测量。这篇综述重点介绍了用于研究 aqSOA 的相关和最近的技术进步，包括光谱学和质谱学。当前关于 aqSOA 过程的知识被消化，重点是最近对界面 aqSOA 形成的研究，包括实验室研究和模型模拟。最后，为现场和实验室研究以及解决大气化学中界面挑战的理论努力推荐了界面化学的未来方向。