Unknown

Dataset Information

0

Frequency-Driven Self-Organized Helical Superstructures Loaded with Mesogen-Grafted Silica Nanoparticles.


ABSTRACT: Adding colloidal nanoparticles into liquid-crystal media has become a promising pathway either to enhance or to introduce novel properties for improved device performance. Here we designed and synthesized new colloidal hybrid silica nanoparticles passivated with a mesogenic monolayer on the surface to facilitate their organo-solubility and compatibility in a liquid-crystal host. The resulting nanoparticles were identified by 1 H?NMR spectroscopy, TEM, TGA, and UV/Vis techniques, and the hybrid nanoparticles were doped into a dual-frequency cholesteric liquid-crystal host to appraise both their compatibility with the host and the effect of the doping concentration on their electro-optical properties. Interestingly, the silica-nanoparticle-doped liquid-crystalline nanocomposites were found to be able to dynamically self-organize into a helical configuration and exhibit multi-stability, that is, homeotropic (transparent), focal conic (opaque), and planar states (partially transparent), depending on the frequency applied at sustained low voltage. Significantly, a higher contrast ratio between the transparent state and scattering state was accomplished in the nanoparticle-embedded liquid-crystal systems.

SUBMITTER: Gutierrez-Cuevas KG 

PROVIDER: S-EPMC5540573 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

altmetric image

Publications

Frequency-Driven Self-Organized Helical Superstructures Loaded with Mesogen-Grafted Silica Nanoparticles.

Gutierrez-Cuevas Karla G KG   Wang Ling L   Zheng Zhi-Gang ZG   Bisoyi Hari K HK   Li Guoqiang G   Tan Loon-Seng LS   Vaia Richard A RA   Li Quan Q  

Angewandte Chemie (International ed. in English) 20161001 42


Adding colloidal nanoparticles into liquid-crystal media has become a promising pathway either to enhance or to introduce novel properties for improved device performance. Here we designed and synthesized new colloidal hybrid silica nanoparticles passivated with a mesogenic monolayer on the surface to facilitate their organo-solubility and compatibility in a liquid-crystal host. The resulting nanoparticles were identified by <sup>1</sup> H NMR spectroscopy, TEM, TGA, and UV/Vis techniques, and t  ...[more]

Similar Datasets

| S-EPMC5796552 | biostudies-literature
| S-EPMC5827101 | biostudies-literature
| S-EPMC3888975 | biostudies-literature
| S-EPMC5452312 | biostudies-literature
| S-EPMC5971106 | biostudies-literature
| S-EPMC9824822 | biostudies-literature
| S-EPMC3799337 | biostudies-literature
| S-EPMC7263784 | biostudies-literature
| S-EPMC5347555 | biostudies-literature
| S-EPMC7454033 | biostudies-literature