用原子力显微镜在有机非线性光学晶体CdHg(SCN)4(H6C2OS)2(CMTD)的(001)面上观察到了许多奇特的心形螺旋生长丘,这种心形线不同于由反向双螺位错发展而成的瑞德环(Frank-Read).我们认为这种心形螺旋生长丘的相邻层交替生长除了与21螺旋轴有关外,还与在台阶源附近形成的结构畴有关.在由心形缺口推展出去的直线"划痕"两侧的台阶流上观察到的相互垂直分布的二维核,使我们认为直线"划痕"可能是90°的结构畴.实验结果说明晶体的结构及台阶源附近的分子键合方向及强度使不同晶体的生长具有独特的规律性.
参考文献
| [1] | Frank F C .The Influence of Dislocations on Crystal Growth[J].Discussions of the Faraday Society,1949,5:48. |
| [2] | Guo Shiyi;Yuan Duorong;Xu Dong et al.Growth of Cadmium Mercury Thiocyanate Dimethyl-Sulphoxide Single Crystal for Laser Frequency Doubling[J].Progress in Crystal Growth and Characterization of Materials,2000,40:75. |
| [3] | Wang Kunpeng;Sun Daliang et al.Research on the (001) Surface Morphology and the Crystal Habits of CMTD crystals[J].The Journal of Functional Materials,2003(34):315. |
| [4] | Wang Kunpeng;Sun Daliang.Spiral Growth Mechanisms of CMTD Crystals[J].Journal of Crystal Growth |
| [5] | Wang Kunpeng;Sun Daliang;Zhang Jianxiu .The Terraced Nuclear Growth Model of CMTD Crystals[J].人工晶体学报,2003,32(05) |
| [6] | Pina C M;Becker U;Risthaus P;Bosbach D .Putnis A. Molecular-scale Mechanisms of Crystal Growth in Barite[J].Nature,1998,395:483. |
| [7] | Jiang X N;Xu D;Sun D L et al.Investigation of Growth Modes of Cadmium Mercury Thiocyanate Crystal by Atomic Force Microscopy[J].Journal of Crystal Growth,2001,233:196. |
| [8] | Jiang X N;Xu D;Yuan D R et al.Effect of Excessive Amount of Cd(Ⅱ) Cations on Surface Morphology of Prismatic {110} Faces of Cadmium Mercury Thiocyanate Crystals[J].Journal of Crystal Growth,2001,236:267. |
| [9] | Verma A R.Crystal Growth and Dislocations[M].Butterworths, London,1953 |
| [10] | 姜雪宁 .配合物型晶体表面形貌与生长机理的研究[D].山东大学,2002. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%