纯掺杂单壁碳纳米管中磷的成键环境研究
On the bonding environment of phosphorus in purified doped single-walled carbon nanotubes
摘要：
本文采用高真空化学气相沉积法，通过三甲基膦的热分解制备了磷掺杂的单壁碳纳米管。此外，一种改进的密度梯度超离心过程已被应用于仔细纯化我们的掺杂材料。拉曼和X射线光电子能谱学的结合使用使我们能够提供第一个洞察到结合到碳晶格中的P的键合环境，避免了合成副产物产生的竞争信号。这项研究代表了第一步，对直接取代发生时，P原子的成键构型的识别。
英文摘要：
In this work, phosphorous-doped single-walled carbon nanotubes have been synthesized by the thermal decomposition of trimethylphosphine using a high-vacuum chemical vapor deposition method. Furthermore, a modified density-gradient-ultracentrifugation process has been applied to carefully purify our doped material. The combined use of Raman and X-ray photoelectron spectroscopy allowed us to provide the first insight into the bonding environment of P incorporated into the carbon lattice, avoiding competing signals arising from synthesis byproducts. This study represents the first step toward the identification of the bonding configuration of P atoms when direct substitution takes place.
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