Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia.
Department of Physical Education, Faculty of Tarbiyah, Insitut Agama Islam Negeri Batusangkar, Batusangkar 27213, Indonesia.
Int J Mol Sci. 2022 Sep 6;23(18):10239. doi: 10.3390/ijms231810239.
Platinum naturally crystalizes into a three-dimensional crystal due to its highly symmetrical fcc lattice, with a metallic bond which is non-directional and highly isotropic. This inherently means ultimately that 2D crystals of a few atoms thick growth are hardly available in this material. Here, we discovered that a combinative effect of formic acid reductant and hexamethylenetetramine surfactant during the reduction of their metal ions precursor can realize an ultimate thin 2D crystal growth in platinum. High-resolution transmission electron microscopy and filed-emission electron microscopy analysis have also discovered that the 2D crystal of Pt has 111 facets with a lateral dimension that can be up to more than 5 μm × 2 μm. The thickness of the 2D crystal of Pt is 1.55 nm. A mechanism for obtaining ultimate thin 2D crystal of Pt using the present approach is proposed.
由于其高度对称的面心立方晶格，铂自然结晶成三维晶体，具有非定向且各向同性的金属键。这意味着在这种材料中几乎不可能获得几原子厚的二维晶体。在这里，我们发现甲酸还原剂和六亚甲基四胺表面活性剂在还原其金属离子前体时的组合效应可以实现铂的最终超薄二维晶体生长。高分辨率透射电子显微镜和场发射电子显微镜分析还发现，Pt 的二维晶体具有 111 个面，其横向尺寸可达 5 μm×2 μm 以上。Pt 的二维晶体的厚度为 1.55nm。提出了一种使用本方法获得最终超薄二维 Pt 晶体的机制。
