论文标题
介孔氧化铝和基于二氧化硅的结晶纳米复合材料，带有量身定制的各向异性：方法，结构和特性
Mesoporous alumina- and silica-based crystalline nanocomposites with tailored anisotropy: methodology, structure and properties
论文作者
论文摘要
我们提出了几种最近合成的纳米复合材料，这些纳米复合材料由液晶以及嵌入介孔氧化铝和二氧化硅纳米渠道的有机分子晶体组成。由于选择了液晶中孕激素，因此选择了通过自发吸收浸入纳米渠道中的黑质和手性胆汁脱脂的客体分子。可以通过修饰表面锚定来定制的纳米通道内的分子顺序，其特征是光学偏振法（线性和/或圆形双折射）与X射线衍射结合使用。为了合成固体晶体纳米复合材料，铁硫酸铁甘氨酸硫酸盐（TGS）纳米晶体通过缓慢蒸发饱和的水溶液中吸收到多孔宿主中，将纳米晶体沉积到纳米渠道中。通过X射线衍射，扫描电子显微镜和介电技术来探索它们的质地和物理化学特性。
We present several recently synthesized nanocomposites consisting of liquid crystals as well as an organic molecular crystal embedded into the nanochannels of mesoporous alumina and silica. As liquid-crystalline mesogens achiral, nematogen and chiral cholesteric guest molecules infiltrated into nanochannels by spontaneous imbibition were chosen. The molecular ordering inside the nanochannels, which can be tailored by modifying the surface anchoring, was characterized by optical polarimetry (linear and/or circular birefringence) in combination with X-ray diffraction. For the synthesis of the solid crystalline nanocomposites ferroelectric triglycine sulfate (TGS) nanocrystals were deposited into the nanochannels by slow evaporation of saturated water solutions imbibed into the porous hosts. Their textural and physicochemical properties were explored by x-ray diffraction, scanning electron microscopy and dielectric techniques.
