Creation of optical functional materials using gold nanorods aligned every a nanometer by an electric field

我们用硫醇封端的LC分子取代了用于稳定金纳米棒的表面活性剂，以增加纳米棒的液晶特性。对纳米棒的电子显微镜观察表明，在纳米棒的排列上可以看到棒间的相互作用。对纳米棒在溶液中进行了SAXS实验，研究了它们之间的取向相互作用，而不受电子显微镜网格表面的影响。从SAXS剖面得到的距离分布函数表明，随着纳米棒长宽比的增加，端到端的相互作用比并排的作用更明显。在纳米棒两端优先取代的LC分子中的氰基联苯基团可以通过静电相互作用来排列它们。在棒间相互作用的基础上，我们对LC封顶的纳米棒施加了电场，以便使它们沿场排列。我们观察到，当电场作用于溶液池中的纳米棒时，SAXS强度随着AR的增加而减小。

We have substituted thiol-terminated LC molecules for the surfactant used to stabilize gold nanorods in order to add LC character to the nanorods. TEM observation of the nanorods indicates inter-rod interactions are seen on the arrangement of the nanorods. SAXS experiments were carried out for the nanorods in a solution to investigate orientational interaction between them without the influence of TEM grid surface. Distance distribution functions obtained from SAXS profiles show end-to-end interactions are more predominant than side-by-side as the aspect ratio of a nanorod increases. Cyanobiphenyl groups in the LC molecules preferably substituted at both ends of nanorods can interact electrostatically to arrange them.On the basis of inter-rod interactions, we have applied an electric field to LC-capped nanorods in order to align them along the field. We have observed that SAXS intensities decrease with increasing AR, when an electric field is applied to nanorods in a solution cell.