Abstract A novel green synthetic route developed toward unveiling a mechanism of formation of single crystalline gold (Au) nanoplates, with a flat surface using an aqueous extract of red beetroot waste (BRW) i.e. peel, at room temperature, the first time. The green method monitored using UV–VIS spectrophotometry, the presence of metallic gold, its structure; orientation and the responsible biomolecules; for reduction validated using EDS, XPS, XRD and FTIR spectroscopies respectively. Based on these significant characterizations, a probable three-step mechanism proposed here for nanoplate synthesis. First, the synthesis of the nanosphere, second its transformation into icosahedrons and ultimately its fragmentation into triangular nanoplates. The green synthetic mechanism for these nanoplates is investigated, validated and evidenced by both HR-TEM and XRD studies. The selected area electron diffraction (SAED) patterns and the assessment of Moire’ fringes confirmed that the nanoplates formed in this manner found single crystalline efficiently oriented in {1 1 1} lattice plane as their basal planes.

中文翻译：

---

揭示甜菜根废物在单晶金纳米片绿色合成中的意外潜力：机理研究

摘要 开发了一种新的绿色合成路线，旨在揭示单晶金 (Au) 纳米片的形成机制，首次使用红甜菜根废物 (BRW) 的水提取物，即在室温下剥离，形成平坦的表面。使用紫外-可见分光光度法监测的绿色方法、金属金的存在、其结构；方向和负责的生物分子；分别使用 EDS、XPS、XRD 和 FTIR 光谱验证还原。基于这些重要的特征，这里提出了一种可能的三步机制用于纳米板合成。首先，纳米球的合成，其次是将其转化为二十面体，并最终碎裂为三角形纳米片。研究了这些纳米片的绿色合成机制，通过 HR-TEM 和 XRD 研究验证和证明。选区电子衍射 (SAED) 图案和莫尔条纹的评估证实，以这种方式形成的纳米板发现单晶有效地以 {1 1 1} 晶格面作为其基面取向。