E. Filatov, A. Chepurov, V. Sonin, A. Zadesenets, S. Gromilov, E. Zhimulev
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引用次数: 0
摘要
以表面多孔的天然金刚石晶体为底物,在500℃和800℃的温度下合成了单相双金属Pt-Co纳米颗粒。孔内金属纳米颗粒以不同上层结构有序程度的Pt0.50Co0.50单相固溶体形式存在。对这两种纳米合金进行了详细的表征,发现它们与空间群P4/mmm呈四方对称。在500℃下得到的样品,晶格参数为a = 2.673(2), C = 3.735(3) Å, C /a = 1.397(1);在800℃下得到的样品,参数为- a = 2.688(2), C = 3.697(3) Å, C /a = 1.375(1)。在实验参数范围内,金刚石与Pt-Co颗粒没有明显的化学相互作用。结果表明,金属材料在蚀刻孔内具有很强的锚定效应。成功地合成了嵌套在洞穴中的双金属Pt-Co颗粒,为研究其磁性提供了便利。Pt-Co在特定钻石成分中的存在也可以用于标记钻石晶体,作为一种微妙识别的手段,以及确认在地球深处溶解钻石时捕获大量金属的可能性。
Porous Natural Diamond with Embedded Metal (Pt0.50–Co0.50)
Natural diamond crystals with a highly porous surface were used as substrates for synthesizing single-phase bimetallic Pt–Co nanoparticles at temperatures of 500 °C and 800 °C. The metal nanoparticles inside the pores were determined to take the form of single-phase Pt0.50Co0.50 solid solutions with different degrees of superstructure ordering. A detailed characterization of both nanoalloys revealed a tetragonal symmetry with a space group, P4/mmm. For the sample obtained at 500 °C, the lattice parameters were a = 2.673(2), c = 3.735(3) Å, and c/a = 1.397(1); for the samples obtained at 800 °C, the parameters were—a = 2.688(2), c = 3.697(3) Å, and c/a = 1.375(1). Within the experimental parameters, no significant chemical interaction of the diamond with the Pt–Co particles was identified. The results demonstrate a strong anchoring effect of the metallic material within the etching pores. The successful synthesis of bimetallic Pt–Co particles embedded inside the caverns can facilitate a study of their magnetic properties. The presence of Pt–Co in specific diamond compositions can also be used for marking diamond crystals as a means for their subtle identification, as well as confirming the possibility of capturing significant amounts of metal along with diamonds during their dissolution in the deep Earth.
期刊介绍:
Chemical research focused on precision enables more controllable predictable and accurate outcomes which in turn drive innovation in measurement science sustainable materials information materials personalized medicines energy environmental science and countless other fields requiring chemical insights.Precision Chemistry provides a unique and highly focused publishing venue for fundamental applied and interdisciplinary research aiming to achieve precision calculation design synthesis manipulation measurement and manufacturing. It is committed to bringing together researchers from across the chemical sciences and the related scientific areas to showcase original research and critical reviews of exceptional quality significance and interest to the broad chemistry and scientific community.