本研究采用高分子凝胶法在聚乙烯醇基体上制备了ZnS微晶.常温下,采用金相显微镜、X射线衍射仪及荧光分光光度计对样品进行了表征.结果表明,PVA膜中的微晶分布均匀,粒径大小为0.2～1μm.微晶具有明显的立方相结构,衍射峰有宽化现象.发现PL光谱的激发峰与发射峰都为双峰结构,发射最高峰在440nm处,半高宽为50nm左右.在紫外灯照射下,肉眼观看该薄膜样品,发出耀眼的蓝光.探讨了微晶在聚乙烯醇稳定剂中的形成机理,聚乙烯醇在体系中起着包覆、稳定及表面修饰作用.
参考文献
| [1] | Leverenz H W.An Introduction to Luminescence of Solids[M].New YorkWiley,1950 |
| [2] | 李忠奇.红外探测器窗口和光学镜头镀膜技术[J].物理,1987(02):95. |
| [3] | Weimer H;Klocek P et al.Advances in Low-cost Long-wave Infared Polymer Wndows[J].Proceedings of SPIE-The International Society for Optical Engineering,1999,3705:275-281. |
| [4] | Faria S .Electroluminescent Characteristics of Small Particle Size Phosphors[J].Journal of the Electrochemical Society,1988,135:2627. |
| [5] | 仲维卓,王步国,施尔畏,李文军,华素坤.水热条件下ZnS晶体的极性生长机制与双晶的形成[J].人工晶体学报,1998(01):1-7. |
| [6] | Chou K S;Wu T H .Synthesis and Characterization of Monodispersed ZnS:Ag Colloids[J].Journal of Colloid and Interface Science,1991,142(02):378. |
| [7] | Bhargava R N;Gallagher D et al.Optical Properties of Manganese-Doped Nanocrystals of ZnS[J].Physical Review Letters,1994,72(03):416. |
| [8] | Mann S .Molecular Recognition in Biomineralization[J].Nature,1988,332:119. |
| [9] | Celikkaya A;Akinc M .Preparation and Mechanism of Formation of Spherical Submicrometer Zinc Sulfide Powders[J].Journal of the American Ceramic Society,1990,73(08):2360. |
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%