In this work, we report storage of oxygen in two-dimensional (2D) crystalline nanosheets comprising luminescent gold nanoclusters (Au NCs). Complexation reaction between Au NCs (stabilized by l-phenylalanine and mercaptopropionic acid) and zinc ions led to the formation of crystalline assembly of Au NCs. The crystalline nature of the assembly of Au NCs was confirmed through transmission electron microscopy (TEM), high-resolution TEM, and selected area electron diffraction (SAED) analysis. Atomic force microscopy (AFM) analysis, in conjunction with field emission scanning electron microscopy (FESEM) analysis, confirmed the 2D nature of the assembly of the Au NCs. The 2D crystalline nanosheets formed out of reaction between Au NCs and Zn2+ were found to be of near-uniform thickness, with an average value of 3.8 ± 1.65 nm. These 2D nanosheets constituting of hierarchically organized Au NCs were further used for reversible storage of oxygen at ambient conditions of 20 °C and 20 bar pressure.

中文翻译：

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基于络合反应的二维二维发光晶体原子团簇，用于可循环利用的氧气存储。

在这项工作中，我们报告了氧气在包含发光金纳米团簇（Au NCs）的二维（2D）晶体纳米片中的存储。Au NCs（被1-苯丙氨酸和巯基丙酸稳定）与锌离子的络合反应导致Au NCs晶体组装的形成。通过透射电子显微镜（TEM），高分辨率TEM和选择区域电子衍射（SAED）分析确认了Au NCs组件的晶体性质。原子力显微镜（AFM）分析与场发射扫描电子显微镜（FESEM）分析相结合，证实了Au NCs组件的2D性质。发现由Au NCs和Zn2 +之间的反应形成的2D晶体纳米片的厚度接近均匀，平均值为3.8±1.65 nm。