Single-walled carbon nanotubes (SWNTs) with lengths of several hundred nanometers were crystallized from dilute solutions, and slender lath-shaped SWNT crystals were obtained. The SWNTs were oriented along the long axis of the lath-shaped crystal, and the obtained crystals were two-dimensional crystals comprising hexagonally close-packed SWNTs. A relatively long SWNT acted as a crystalline nucleus. The length of the SWNT used for crystallization affected the morphology and growth rate of the crystals. Higher crystallization temperature shortened the time to precipitation, and the diffusion of SWNTs dominated the crystal growth of SWNT crystals. Because the short SWNTs were rigid with a wide length distribution, their tube ends were inevitably included in the crystals, resulting in crystal defects, such as lattice curvature and edge dislocations. These defects were directly observed by high-resolution electron microscopy. The mechanism for the crystallization of the SWNTs was proposed based on the observed morphologies, crystal defects, and crystallization process.

从稀溶液中结晶出长度为几百纳米的单壁碳纳米管（SWNT），得到纤细的板条状SWNT晶体。将SWNT沿着板条状晶体的长轴取向，并且所获得的晶体是包含六方紧密堆积的SWNT的二维晶体。相对较长的SWNT充当晶核。用于结晶的SWNT的长度影响晶体的形态和生长速率。较高的结晶温度缩短了沉淀时间，SWNTs的扩散主导了SWNT晶体的晶体生长。由于短的单壁碳纳米管是刚性的，具有宽的长度分布，因此其管端不可避免地包含在晶体中，从而导致晶体缺陷，例如晶格曲率和边缘错位。这些缺陷可以通过高分辨率电子显微镜直接观察到。根据观察到的形貌，晶体缺陷和结晶过程，提出了单壁碳纳米管结晶的机理。