| 1. | The emission wavelength of qds was controlled by the size of the core and each single - color of qds has narrow symmetrical emission peak 量子点的发射波长取决于核心粒子的大小,而每一种单色量子点的发射波长窄而对称。 |
| 2. | These emission peaks are located in the directions of the specular reflection of laser , the target normal and the back - reflection of laser respectively 这些超热电子发射峰分别沿着激光反射方向、靶法线方向和激光背反射方向。 |
| 3. | Excitation at 493nm , the emission peaks of pff5 in chloroform solution is 540nm and 580nm . using pff5 as the emitter , an efficiency single layer led has been fabricated . 3 利用pff5作为发射层,研制单层高效的聚合物发光二极管,研究器件的伏安特性、电压亮度特性和电致发光光谱。 |
| 4. | The effective excite wavelength range is 350 - 355nm for the exciton - exciton collision peak and we observed a blue emission peak at about 472nm caused by zinc vacancy . 3 对激子-激子碰撞峰来说,有效的激发波长在350 - 355nm处,同时在472nm左右存在有一个由锌空位造成的深能级的蓝光发射峰。 |
| 5. | Compared with pl of pure nanotube , the emission peak energy shift value was larger . this may result from the formation of oxygen vacancies in the nanotube during the process of surface - modification ( 2 )使用十六醇对纳米管钛酸进行了化学修饰,结果表明纳米管表面与十六醇发生酯化反应。 |
| 6. | Mda ( 20mm ) reduced sharply the typical fluorescence of proteins ( excitation 280nm / emission 350nm ) and produced age pigment - like fluorescence with a strong emission peak at 460 nm excited at 395 nm when incubated at 37 通过对脂质过氧化的次级产物? ?各类双功能醛及其它单功能醛对不同生物溶液流变性及荧光特性的作用的对比研究。 |
| 7. | Four blue light emission peaks were found in the pl spectra of porous silicon which was subjected to rapid thermal process ( rtp ) . similar results can be got after porous silicon samples were subjected to rtp in different gases 结果表面,在不同的气氛中( n 》 o ) ar ,空气)中rtp处理后,均可得到多孔硅的蓝光发射,而且具有很好的重复性。 |
| 8. | After hf dipping , four blue emission peaks in pl spectra still can be observed . so the blue emission was not from sio2 or the defects in sio2 . it is possible that the blue light emission was from the skeleton of porous silicon 在其他文献报道中,用同样类型的硅片制备的多孔硅,却没有发现这一现象,这说明要实现多孔硅的蓝光发射的要求是很苛刻的。 |
| 9. | We researched the influences of systhesis temperature , heat preservation time , eu + concentration , reduction surrounding feeling and flux on luminescent properties of sral2o4 : eu2 + phosphors , optimized the experiment conditions and reduced systhesis temperature about 100 c . we found that the systhesized sample ' s luminescent brightness is better with increasing systhesis temperature , but the phase component is more complex . we found that the luminescence brightness of sample appear a increasing process at first , and then a reducing one with the raise of eu2 + concentration , it indicated that the luminescence brightness is not better if the eu2 + concentration is too high or low . we found that the systhesized sample can not bright at too long heat preservation time , and the luminescence brightness is lower at too short heat preservation time . we found that particle diameter is bigger , the wavelength of emission peak is longer 研究发现合成温度高,合成样品的发光效果好,但物相组成也较复杂; eu ~ ( 2 + )离子在一定掺杂浓度范围内,合成样品的发光亮度先是出现一个提高过程,然后是一个降低过程,说明eu ~ ( 2 + )离子浓度高或低都不利于合成样品发光;保温时间较长,合成样品不发光,保温时间较短,合成样品发光效果不好,只有合适的保温时间才能合成发光效果好的样品;合成样品的粒径大小与发射峰的位置具有一定的关系,粒径越大,发射峰越偏向长波方向;助熔剂对样品的合成温度和发光性能都有影响,助熔剂的量较低时,主要表现为助熔作用,对发光影响不大,助熔剂的量较高时,使得样品发光亮度降低和余辉时间缩短;还原方式的不同,合成样品的发光性能也不一样。 |
| 10. | It was the first time that the silica nanoparticles was coated with gd2o3 : eu rare - earth oxides , then the core - shell structure compound particles were obtained . the characterizations showed that the thickness of uniform coating is in 10 - 20nm ; the silica core is linked with the gd2o3 : eu shell by chemical bond si - o - gd ; because of the size effects and interface effects of nano - crystal coating , the diffraction and emission peaks become broadened . and at the same time , the transfer temperature of silica from amorphous to crystal is decreased 首次在纳米sio2表面包覆一层gd2o3 : eu稀土复合氧化物,得到了核-壳结构的复合颗粒,表征结果表明,均匀包覆层的厚度为10 - 20nm ; sio2核和gd2o3 : eu壳层物质之间通过化学键si - o - gd键的作用结合在一起;由于包覆层纳米晶的尺寸效应和界面效应使xrd衍射峰和荧光光谱发射峰出现了宽化现象。 |