The knowledge of the chemical stability of few-layer InSe nanosheets is important for its potential practical device applications. Here, the degradation characteristics of the as-exfoliated ultrathin InSe are studied through Raman spectroscopy. Under the laser excitation of 1 mW, very fast laser-induced degradation has been demonstrated. Moreover, it is found that fewer layered InSe is unstable even after exposure to air for a few hours. The oxidation products during the degradation process are also carefully examined, which are shown to be In₂Se₃ and In₂O₃.

中文翻译：

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通过拉曼光谱研究少层 InSe 纳米片的稳定性

了解少层 InSe 纳米片的化学稳定性对其潜在的实际设备应用很重要。在这里，通过拉曼光谱研究了剥离后的超薄 InSe 的降解特性。在 1 mW 的激光激发下，已经证明了非常快的激光诱导退化。此外，发现即使暴露在空气中几个小时后，较少的层状 InSe 也是不稳定的。降解过程中的氧化产物也经过仔细检查，显示为 In ₂ Se ₃和 In ₂ O ₃。