Shenzhen Engineering Lab for Supercapacitor Materials, Shenzhen Key Laboratory for Advanced Materials, Department of Material Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, University Town, Shenzhen 518055, China.
Nanoscale. 2018 Feb 8;10(6):2812-2819. doi: 10.1039/c7nr07100k.
Three-dimensional ordering of two-dimensional nanomaterials has long been a challenge. Simultaneously, diamond nanomaterials are difficult to synthesize due to the harsh synthesizing conditions required. Here, we report substrate-crystal-orientation dependent growth of diamond nanosheets (DNSs) by chemical vapor deposition, which generates different DNS arrays on different substrates. The DNSs are grown by the in-plane epitaxy of the diamond {111} planes. So the arrays are highly ordered and solely determined by the spatial orientation of the {111} planes in the diamond FCC structure. The DNSs grown on the {110}, {111}, {001}, and {113} oriented substrates show inclination angles ranging from 90 to 29.5°. The DNSs with larger inclination angles grow preferentially, forming parallelogram arrays with inclination angles of 90° on the {110} substrates and parallel-line arrays with inclination angles of 80° on the {113} substrates. The density, thickness, size, and morphology of the DNSs have been well controlled. The present understanding and materials are highly promising for many applications such as sensors, catalysis, photonics, thermal management, and electronics.
二维纳米材料的三维有序排列一直是一个挑战。同时，由于需要苛刻的合成条件，金刚石纳米材料很难合成。在这里，我们通过化学气相沉积报告了基底-晶体取向依赖的金刚石纳米片（DNSs）的生长，这在不同的基底上产生了不同的 DNS 阵列。DNSs 通过金刚石 FCC 结构中{111}面的面内外延生长。因此，这些阵列具有高度的有序性，并且完全由金刚石 FCC 结构中{111}面的空间取向决定。在{110}、{111}、{001}和{113}取向的基底上生长的 DNSs 的倾斜角度范围从 90 度到 29.5 度。具有较大倾斜角度的 DNSs 优先生长，在{110}基底上形成倾斜角度为 90 度的平行四边形阵列，在{113}基底上形成倾斜角度为 80 度的平行线阵列。DNSs 的密度、厚度、尺寸和形态得到了很好的控制。目前的理解和材料在传感器、催化、光子学、热管理和电子等许多应用中具有很高的应用前景。
