Tuning of optical properties and phase behavior of Nanomaterial-stabilized blue phase liquid crystals

被引：6

作者：

Tohgha, Urice N. ^{[1
,2
]}

Crenshaw, Ecklin P. ^{[1
,2
]}

McConney, Michael E. ^{[1
]}

Lee, Kyung Min ^{[1
,2
]}

Godman, Nicholas P. ^{[1
]}

机构：

[1] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

[2] Azimuth Corp, Fairborn, OH 45324 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2023年 / 639卷

关键词：

Nanoparticle; Blue phase liquid crystal; Phase behavior; Stabilization; and Optical property;

D O I：

10.1016/j.jcis.2023.02.076

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hypothesis: Nanoparticles of various shapes and sizes can affect the optical properties and blue phase (BP) stabilization of BP liquid crystals (BPLCs). This is because nanoparticles, which are more compatible with the LC host, can be dispersed in both the double twist cylinder (DTC) and disclination defects in BPLCs. Experiments. This study presents the first systematic study of the use of CdSe nanoparticles having various sizes and shapes (spheres, tetrapods and nanoplatelets) to stabilize BPLCs. Unlike previous studies using commercial nanoparticles (NPs), we custom-synthesized NPs with the same core and nearly identical long chain hydrocarbon ligand materials. Two LC hosts were used to investigate the NP effect on BPLCs. Findings. The size and shape of nanomaterials greatly influence the interaction with LCs, and the dispersion of NPs in the LC medium affects the position of the BP reflection band and the stabilization of BPs.

引用

页码：401 / 407

页数：7

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