Chen Chuyang, Sun Xudong, Jiang Xuchuan, Niu Dun, Yu Aibing, Liu Zhigang, Li Ji Guang
Nanoscale Res Lett. 2009 May 21;4(9):971-976. doi: 10.1007/s11671-009-9343-5.
This work reports a newly developed two-step hydrothermal method for the synthesis of monodispersed colloidal carbon spheres (CCS) under mild conditions. Using this approach, monodispersed CCS with diameters ranging from 160 to 400 nm were synthesized with a standard deviation around 8%. The monomer concentration ranging from 0.1 to 0.4 M is in favor of generation of narrower size distribution of CCS. The particle characteristics (e.g., shape, size, and distribution) and chemical stability were then characterized by using various techniques, including scanning electron microscopy (SEM), FT-IR spectrum analysis, and thermalgravity analysis (TGA). The possible nucleation and growth mechanism of colloidal carbon spheres were also discussed. The findings would be useful for the synthesis of more monodispersed nanoparticles and for the functional assembly.
这项工作报道了一种新开发的两步水热法，用于在温和条件下合成单分散胶体碳球（CCS）。采用这种方法，合成了直径范围为160至400 nm的单分散CCS，标准偏差约为8%。单体浓度在0.1至0.4 M范围内有利于生成尺寸分布更窄的CCS。然后使用各种技术对颗粒特性（如形状、尺寸和分布）以及化学稳定性进行了表征，包括扫描电子显微镜（SEM）、傅里叶变换红外光谱分析（FT-IR）和热重分析（TGA）。还讨论了胶体碳球可能的成核和生长机制。这些发现将有助于合成更多的单分散纳米颗粒以及进行功能组装。
