用拉曼光谱手段对CVD方法生长的金刚石膜,特别是其中最有争议的1145cm-1附近的拉曼峰进行了研究。用不同波长激光激发得到此峰的拉曼谱与量子尺寸选择效应所预期规律的相反,反驳了将1145cm-1附近的拉曼峰指认为纳米晶金刚石本征峰的说法。而通过对不同样品的比较,从侧面支持了将它归结为杂质,即反式聚乙炔的指认。更进一步通过分析不同尺寸的样品中杂质峰的相对强度,提出了这个峰的强度或许可以作为金刚石晶粒尺寸判据的建议。 Raman spectroscopy was used to investigate the growth of CVD diamond films, especially the most controversial Raman peak around 1145 cm-1. Contrary to the expectation of the Raman spectrum of this peak excited by the different wavelength laser excitation and the expectation of the quantum size selection effect, we argue that the Raman peak around 1145cm-1 is regarded as the intrinsic peak of nanocrystalline diamond. And by comparing different samples, from the side to support the attributed to it as impurities, that is, the identification of trans-polyacetylene. Further, by analyzing the relative intensities of impurity peaks in different size samples, the strength of this peak may be suggested as a criterion for the grain size of diamond.