掺杂

This thesis demonstrates the pre-polymers in a polymer-dispersed cholesteric liquid crystals can be polymerized into a polymer film, which can eliminate the aligning capability of the homogeneous alignment layer. Thereafter, the textures of the cholesteric liquid crystals in UV-cured region can be changed from reflective planar texture to the scattered focal conic one. Additionally, the clearing temperature of the liquid crystals can be reduced by doping with chiral dopant or monomers. The cause is the increase of the impurity concentration in LCs. In other words, if the monomers are polymerized, the clearing temperature of LCs in that region should increase due to the decrease of the impurity concentration. Therefore, impurities associated with doping with monomeric and chiral dopants cause the clearing temperature of LCs in cured region to differ from that in uncured region.

本文中，我们提出在高分子聚合物薄膜之胆固醇液晶(polymer-dispersed cholesteric liquid crystals，简称PDCLCs)中，利用紫外光使PDCLC中的单体聚合成薄膜，此即为光引致聚合反应，而该薄膜将原本在表面所作的配向膜覆盖且破坏其配向能力，使胆固醇液晶由原本反射的planar结构转换成散射的focal conic结构；另外，有关液晶材料的相变温度会由於掺杂手性分子或单体而降低，此因液晶材料内『杂质』浓度增加，而造成的液晶材料之不纯度增加，最终导致相变温度降低，若搭配上述光引致聚合反应，则由於光照区之单体聚合，使该区域单体占总材料之比例下降，即不纯度降低，进而使液晶材料之相变温度上升，该区域之相变温度与未照光区有所不同。

All of thses might imply that the sensitization mechanisms of the doped formate and were independent of each other and not conflicting.

2经化学增感的乳剂：普通乳剂使用的常规化学增感方法对甲酸盐掺杂的乳剂仍然十分有效。

The second general problem of cell fractionation is the contamination of each fraction by others.

细胞组分分离的第二个普遍问题是各组分的相互掺杂。

The results showed that the mobility of free carriers is the key inluencing factor on the electrical conductivity of intrinsic nc-Si: H films but the effect of free carrier concentration is finite, while the free carrier concentration and mobility are both the main influencing factors on the electrical conductivity of phosphorus-doped nc-Si: H films. Its transportability can be reasonably explained by a HQD model.

研究结果表明影响本征纳米硅电导率的主导因素是载流子的迁移率，而自由载流子浓度影响有限；影响掺磷纳米硅薄膜电导率的因素既包括磷掺杂产生的自由载流子，又包括迁移率，其输运过程可用量子点隧穿模型合理解释。

The N and Al elements hindered phase transfer of TiO_2, restrained growth of nano-TiO_2 particles and improved the crystallization temperature. Degradation ability of N and Al co-doped TiO_2 thin films annealed at 500℃to acid fuchsin whether under UV light or under artificial simulated sun light was the best.

无论是在紫外光下还是人工模拟太阳光下，其对酸性品红的降解效果存在一个最佳退火温度。500℃退火处理N和Al共掺杂TiO_2薄膜的光催化活性最高。

The results indicate that the products were PANI doped with gallic acid or ferulic acid.

结果表明，所制备材料确为阿魏酸、没食子酸掺杂的PANI。

The preparation of the nano-TiO〓 powder mixed with copper ions by hydrthermal method and the preparative condition of the ZnO nano-stick by gaseous phase deposition method were discussed in this chapter.

本部分研究了利用水热法制备掺杂铜离子的纳米TiO〓粉体和利用气相沉积法制备氧化锌纳米棒的制备条件。

The influence of the Gd〓 doping to the crystal growth is discussed.

分析了Gd〓掺杂对晶体生长的影响。

Experiments were made to investigate how the spectrum of the stimulated Raman scatting gain changes with germania concentration and different pump power.

研究了受激拉曼散射增益系数和增益谱与泵浦功率、光纤掺杂浓度的关系，得出增益系数和峰值频移量由光纤特性决定，而与泵浦功率无关的结论。

In order to improve the conductivity of LiFePO4 samples, the chemical reagents were intermingled with grape sugar and various kinds of electric carbon and then obtained a variety of samples by high temperature solid-state reaction.

在此基础上，我们进行了各种碳源的掺杂，以改善其导电性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。