Lejček L, Novotná V, Glogarová M
Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21 Prague 8, Czech Republic.
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Jan;89(1):012505. doi: 10.1103/PhysRevE.89.012505. Epub 2014 Jan 21.
We show how the inclusions of the nanoparticles or the clusters of nanoparticles in the liquid-crystalline smectic-A phase lead to layer deformations and may create a tilt in their vicinity, thus inducing locally a smectic-A-smectic-C transition. We have studied a freestanding film of "de Vries" compound, which exhibits the smectic-A-smectic-C transition without layer shrinkage, mixed with functionalized gold nanoparticles. The tilt induced by nanoparticle clusters, which decorate the edge dislocations, has been observed in the smectic-A phase. The tilt of liquid-crystal molecules near nanoparticles is a consequence of interaction of liquid-crystalline molecules with the surface of nanoparticles. The observed tilt may prove the concept of existence of a disordered tilt in the smectic-A phase of de Vries compounds. The tilt distribution near nanoparticles is discussed using both the smectic-A elasticity and local smectic-A-smectic-C transition.
我们展示了纳米颗粒或纳米颗粒团簇包含在液晶近晶-A相中如何导致层变形，并可能在其附近产生倾斜，从而局部诱导近晶-A-近晶-C转变。我们研究了一种“德弗里斯”化合物的独立薄膜，它在不发生层收缩的情况下表现出近晶-A-近晶-C转变，并与功能化金纳米颗粒混合。在近晶-A相中观察到由装饰位错边缘的纳米颗粒团簇引起的倾斜。纳米颗粒附近液晶分子的倾斜是液晶分子与纳米颗粒表面相互作用的结果。观察到的倾斜可能证明了德弗里斯化合物近晶-A相中存在无序倾斜这一概念。使用近晶-A弹性和局部近晶-A-近晶-C转变来讨论纳米颗粒附近的倾斜分布。
