| 1. | Study of photoluminescence enhancement of silver nanoparticles embedded in bao thin film 纳米粒子可见光波段的光致荧光增强现象研究 |
| 2. | Non - destructive testing . industrial radiology . identification card for radiographic papers used with fluorescent intensifier screens 无损检验.工业放射学.荧光增强屏上用射线照相纸的识别卡 |
| 3. | Nano - zns : mn2 + dispersed in pvb film has the same enhancement after exposure in solar light . the material has potential on measuring the dosage of uv irradiation of solar light 薄膜样品在太阳光辐照下同样有荧光增强行为,预示该样品可以作为一种紫外辐照剂量的记录材料。 |
| 4. | ( 4 ) light - induced spectral change and its restore processes in the dark in nanocrystalline y2o3 : tb were studied . it was observed that the intensity in 4f5d band increased by ultraviolet and visible irradiation ( 4 )研究了光辐照引起的y _ 2o _ 3 : tb荧光增强现象,观察到颗粒尺寸越小辐照光波长越短,光诱导荧光增强效果越明显。 |
| 5. | Two restore components were observed , corresponding to two defects , the internal and the surface . the studies on electron spin resonance ( epr ) spectra indicate that optical irradiation eliminated the dangling y - o bonds in the surface 首次对y _ 2o _ 3纳米晶电子顺磁共振谱进行了研究,结果表明光辐照引起荧光增强原因与光辐照对钇的悬空键的消除有关。 |
| 6. | We consider that surface state act as quenching centers . with the irradiation , the surface state decreases and therefore luminescence of mn2 + increases . reduction of quenching centers is the result of chemical change by obtaining energy from zns excited by uv light 荧光增强的原因是由于zns基质向mn2 +离子和表面态的能量传递是两个相互竞争的过程,紫外光辐照下表面猝灭中心数目不断减少从而mn2 +离子的发光增强。 |
| 7. | In this thesis , we studied optical properties of eu3 + and mn2 + doped zns nanocrystallites . the new results are as follows : 1 . zns : mn2 + ethanol colloids were synthesized and dispersed into pvb film . the luminescence enhancement of mn2 + was observed after ultraviolet irradiation 制备出纳米zns : mn2 +乙醇溶胶和pvb薄膜样品,均观察到紫外光辐照下的荧光增强现象,增长倍数超过20倍,高于以前的报导,并发现样品在固体薄膜和溶胶中有不同的荧光增强行为。 |
| 8. | Life time of mn2 + in nano - zns was measured and was found to be close to that of the bulk materials . therefore the quenching centers quench the exciton but not the mn2 + ion self . 2 . the increasing curves are different in film and ethanol colloids because there is diffusion process of quenching centers in colloids 对薄膜样品的荧光增强曲线的拟合表明,颗粒表面猝灭中心数目随辐照时间的衰减函数是非e指数形式;同时考虑溶液中猝灭中心通过向颗粒表面的扩散而逐渐耗尽,很好地解释了溶胶的增强曲线与固体薄膜的增强曲线的不同。 |
| 9. | Exogenous vc completely abolished the fluorescence increase induced by nacl or nacl + aba , but exogenous cat ( 20u / ml ) could only abolish h2o2 generation in the region of plasma membrane , and had no effects on the h2o2 generation inside the guard cells , such as the regions of chloroplasts 胞外vc ( 10mm )可完全阻断nacl及nacl + aba诱导的荧光增强,而胞外cat ( 20 ml )只能抑制nacl及nacl + aba处理时保卫细胞质膜部位的荧光增强,对胞内叶绿体部位的回雨大学研霓圭扬士学伍茫文荧光增强无明显作用。 |
| 10. | Furthermore , an enhanced up - conversion emission at 604nm induced by ultraviolet irradiation was observed for the nanosized zirconia powders doped with eu3 + ions . the relation between the enhanced fluorescence and the annealing temperature was investigated , and we found that the fluorescence increment decreased with increasing of the annealing temperature 同时我们观察到了eu ~ ( 3 + )掺杂的二氧化锆纳米材料在紫外光照射下有荧光增强现象,研究了荧光增强幅度和样品退火温度及尺寸的关系,发现随退火温度的提高,样品荧光增强的幅度变小。 |