以四元微乳液(十六烷基三甲基溴化铵/水/正己烷/正戊醇)为介质,在130℃水热环境下合成了直径30～80nm,长170～1110nm的六方相硫化镉纳米棒,并以XRD、TEM、HRTEM、EDS等手段进行表征。实验发现,硫化镉纳米棒生成的中间状态是由许多三角形的小晶粒串联而成的塔形纳米棒,且随时间的延长,塔形棒晶逐渐模糊而成表面光滑且沿c轴方向生长的棒晶。由此推断在水热微乳液环境中纳米棒是由三角形单晶沿c轴串联而成塔形中间体并在S2-的持续补给下形成的。
Hexagonal cadmium sulfide nanorods with diameters of 30～80 nm and lengths up to 170～1110 nm were prepared in CTAB/water/hexane/n-pentanol quaternary
microemulsion under hydrothermal conditions at 130℃. The products were characterized by XRD, TEM, HRTEM, and EDS. The mediate tower-shaped
rods, being composed of triangular crystals coordinated along c-axis, were observed. While aging, sharp edges of the tower-shaped rods were greatly
blurred with the final product of smooth rods. Based on the facts, a direction aggregation process from triangular crystals to the final smooth
rods with the continuous provision of sulfide was proposed for the growth mechanism of nanorods.
参考文献
| [1] | Henglein A. Chem. Rev., 1989, 89: 1861--1873. [2] Yang J, Zeng J, Yu S, et al. Chem. Mater., 2000, 12: 3259--3263. [3] Wu J, Jiang Y, Li Q, et al. J. Cryst. Growth., 2002, 235: 421--424. [4] Li Y, Wan J, Gu Z. Mater. Sci. Eng., 2000, A286: 106--109. [5] Zhan J, Yang X, Wang D, et al. Adv. Mater., 2000, 12 (18): 1348--1351. [6] Xu D, Xu Y, Chen D, et al. Chem. Phys. Lett., 2000, 325: 340--344. [7] Tojo C, Blanco M C, Rivadulla F, et al. Langmuir., 1997, 13: 1970--1977. [8] Giustini M, Palazzo G, Colafemmina G, et al. J. Phys. Chem., 1996, 100: 3190--3198. [9] Qi L, Ma J, Cheng H, et al. J. Phys. Chem. B., 1997, 101: 3460--3463. [10] Hopwood J D, Mann S. Chem. Mater., 1997, 9: 1819--1828. [11] Chen M, Xie Y, Lu J, et al. J. Mater. Chem., 2002, 12: 748--753. [12] So W W, Jang J S, Rhee Y W, et al. J. Colloid Interf. Sci., 2001, 237: 136--141. |
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