排序方式: 共有8条查询结果,搜索用时 15 毫秒
1
1.
2.
3.
离子液体的可设计性,使得新型表面活性离子液体不断涌现,从而将具有不同功能基团的离子液体引入到了传统的有序分子聚集体中,这也将有助于实现有序分子聚集体的可控性和功能化。本文综合评述了表面活性离子液体在水溶液及离子液体中的胶束化行为,重点总结了烷基碳链长度、阴离子结构和阳离子结构对表面活性离子液体聚集行为的影响,介绍了新型功能性表面活性离子液体在水溶液中的胶束化行为,分析了表面活性离子液体与传统表面活性剂复配体系的协同增效作用,并探讨了表面活性离子液体构建的胶束体系的发展方向。 相似文献
4.
利用偏光显微镜(POM)、小角X射线散射(SAXS)及傅里叶变换红外(FTIR)光谱技术研究了嵌段共聚物PluronicL64(PEO13PPO30PEO13)(PEO:聚氧乙烯;PPO:聚氧丙烯)在室温离子液体1-丁基-3-甲基咪唑四氟硼酸盐[Bmim][BF4]中的聚集行为.绘制了L64/[Bmim][BF4]体系的相图,当L64浓度介于40%-65%(w,质量分数)之间时,L64可与[Bmim][BF4]形成层状液晶.SAXS结果表明,液晶层间距随L64浓度的增加而降低.温度对液晶微结构影响较大,液晶层间距随温度的升高而增大,极性头截面积则减小.并且,在一定温度范围内,升温可使体系的有序性增强.但是,随温度的进一步升高,[Bmim][BF4]与PEO链段之间的氢键被破坏,双折射现象消失,液晶有序性降低.此外,分析了层状液晶的形成机理,[Bmim][BF4]与L64分子间的氢键作用力、静电作用力以及疏溶剂力是液晶形成的驱动力. 相似文献
5.
6.
We investigate continuous variable entanglement produced in two distant coupled cavities, in which two four-level atoms are driven by classical fields respectively. Under the large detuning condition, an effective Hamiltonian containing the square of the creation (annihilation) operator of the cavity field is derived. Due to the nonlinearity, entanglement formally created by the beam splitter type interaction is transformed into the nondegenerate parametric down conversion type. Employing the operator algebraic method, we study the time evolution of the entanglement condition, and show that the system provides us an advantage in achieving a larger photon number with better entanglement. We also discuss the dissipation of the cavities affecting the entanglement. 相似文献
7.
Controlling multiple optomechanically induced transparency in the distant cavity-optomechanical system 下载免费PDF全文
We theoretically investigate a two-cavity optomechanical system in which each optical cavity couples to a mechanical resonator via radiation pressure force,and the two optical cavities couple to each other via a distant waveguide.Our study shows that the multiple optomechanically induced transparency can be observed from the output field at the probe frequency.The number and width of the transparent windows can be tuned by the classical driving power Pl.We also analyze the distance of the two outermost transparency windows,which shows a linear relation with the parameters Pl andλ.Our approach is feasible for controlling multipartite induced transparency,which represents a valuable step towards quantum networks with photonic and phononic circuits. 相似文献
8.
利用偏光显微镜(POM)和小角X射线散射(SAXS)技术研究了不同极性的助溶剂对嵌段聚合物L64(PEO13PPO30PEO13,PEO:聚氧乙烯;PPO:聚氧丙烯)和1-丁基-3-甲基咪唑四氟硼酸盐([Bmim][BF4])形成的层状液晶结构的影响。极性较小的对二甲苯、庚烷、环己烷和异辛烷均可少量增溶于层状液晶中,并使得液晶的结构更有序。极性较大的水分子与L64和[Bmim][BF4]之间均可形成氢键和静电作用力,这种竞争性作用力,使得L64和[Bmim][BF4]之间的静电作用力减弱,层状液晶结构被破坏。基于液晶纹理织构和SAXS谱图,提出了助溶剂对层状液晶结构影响的作用机理。 相似文献
1