当前位置：
X-MOL 学术
›
ACS Appl. Nano Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Mesomorphic Ceramic Films Synthesized via Lyotropic Self-Assembly of Metal Oxide Nanorods Complete with Sintering
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-22 , DOI: 10.1021/acsanm.0c01668 Wenshi Zhang 1 , Shaw H. Chen 1 , James N. Hilfiker 2 , Mitchell Anthamatten 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-10-22 , DOI: 10.1021/acsanm.0c01668 Wenshi Zhang 1 , Shaw H. Chen 1 , James N. Hilfiker 2 , Mitchell Anthamatten 1
Affiliation
|
Mesomorphic ceramics are broadly defined as solid systems with morphologies intermediate between isotropic materials and single crystals. To illustrate this materials concept, a class of mesomorphic ceramics with nematic-like superstructures has been synthesized via lyotropic liquid crystals of titanium dioxide, TiO2, in an isotropic solvent for a demonstration of uniaxially oriented solid films. A lyotropic dispersion of ligand-capped anatase nanorods at 60 wt % in chlorobenzene was calcined and sintered with prior manual shear to form an optically anisotropic, 2.3 ± 0.3 μm-thick solid film. In the course of sintering, nanorods fuse into low-aspect ratio grains that form nematic domains. Shear-induced alignment of nanorods followed by thermal treatment creates uniaxial orientation across millimeters, which exhibits high optical transparency and a nearly constant birefringence of 0.018 ± 0.002 from 650 to 1700 nm. Distinct from liquid-crystal templating, this new approach yields superstructures of nanoparticles with relative ease and at lower costs. The present study opens a pathway toward robust, ceramic-based solid films for diverse application.
中文翻译：
通过烧结完成金属氧化物纳米棒的溶质自组装合成的介晶陶瓷膜
介晶陶瓷被广泛定义为固态系统，其形态介于各向同性材料和单晶之间。为了说明这种材料概念，通过二氧化钛TiO 2的溶致液晶合成了一类具有向列状超结构的介晶陶瓷。在各向同性溶剂中用于演示单轴取向固体膜。将煅烧的配体封端的锐钛矿型纳米棒以60 wt％的溶溶性分散在氯苯中，并用现有的手动剪切机烧结，以形成厚度为2.3±0.3μm的光学各向异性固体膜。在烧结过程中，纳米棒融合成低纵横比的晶粒，形成向列域。纳米棒的剪切诱导排列，然后进行热处理，产生了跨毫米的单轴取向，这表现出很高的光学透明性，并且在650至1700 nm范围内具有几乎恒定的0.018±0.002双折射。与液晶模板不同，此新方法可相对容易地以较低的成本生产纳米粒子的超结构。本研究为各种应用提供了通往坚固的陶瓷基固体膜的途径。
更新日期：2020-11-25
中文翻译：
通过烧结完成金属氧化物纳米棒的溶质自组装合成的介晶陶瓷膜
介晶陶瓷被广泛定义为固态系统，其形态介于各向同性材料和单晶之间。为了说明这种材料概念，通过二氧化钛TiO 2的溶致液晶合成了一类具有向列状超结构的介晶陶瓷。在各向同性溶剂中用于演示单轴取向固体膜。将煅烧的配体封端的锐钛矿型纳米棒以60 wt％的溶溶性分散在氯苯中，并用现有的手动剪切机烧结，以形成厚度为2.3±0.3μm的光学各向异性固体膜。在烧结过程中，纳米棒融合成低纵横比的晶粒，形成向列域。纳米棒的剪切诱导排列，然后进行热处理，产生了跨毫米的单轴取向，这表现出很高的光学透明性，并且在650至1700 nm范围内具有几乎恒定的0.018±0.002双折射。与液晶模板不同，此新方法可相对容易地以较低的成本生产纳米粒子的超结构。本研究为各种应用提供了通往坚固的陶瓷基固体膜的途径。
京公网安备 11010802027423号