School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Electrical Science and Engineering, Southeast University, 210096, Nanjing, China.
Chem Commun (Camb). 2023 Feb 23;59(17):2433-2436. doi: 10.1039/d2cc06813c.
Phosphorene nanoribbons (PNRs) combine the flexibility of one-dimensional (1D) nanomaterials with the large specific surface area and the edge and electron confinement effects of two-dimensional (2D) nanomaterials. In spite of the substantial advances in bulk black phosphorus (BP) manufacturing, achieving PNRs without degradation is still a big challenge. In this work, we present a strategy for the space-confined chemical vapor transport synthesis of quasi-one-dimensional surface-passivated monocrystalline PNRs on a silicon substrate. The growth mechanism of the PNRs is proposed by combining experimental results and DFT calculations, indicating that the P molecules can break, restructure, and epitaxially nucleate on the surface of the AuSnP catalyst, and finally prefer to grow along the zigzag (ZZ) direction to form PNRs. The low gas flow rate and an appropriate phosphorus molecule concentration allow the growth of PNRs with structural integrity, which can be regulated by the amount of red phosphorus and the confined space.
磷烯纳米带（PNRs）结合了一维（1D）纳米材料的柔韧性与二维（2D）纳米材料的大比表面积和边缘及电子限制效应。尽管在块状黑磷（BP）制造方面取得了重大进展，但在不降解的情况下实现 PNRs 仍然是一个巨大的挑战。在这项工作中，我们提出了一种在硅衬底上通过空间限制的化学气相输运法合成准一维表面钝化单晶 PNRs 的策略。通过结合实验结果和 DFT 计算提出了 PNRs 的生长机制，表明 P 分子可以在 AuSnP 催化剂的表面上断裂、重构和外延形核，最终优先沿着锯齿形（ZZ）方向生长形成 PNRs。低气体流速和适当的磷分子浓度允许具有结构完整性的 PNRs 生长，其可以通过红磷的量和受限空间来调节。
