The effects of silica nanoparticles on blue-phase liquid crystals

Hsu, Che Ju; Huang, Mao Kun; Tsai, Pei Chun; Hsieh, Chia Ting; Kuo, Kuan Lin; You, Chang Feng; Lo, Kuang Yao; Huang, Chi Yen

doi:10.1080/02678292.2017.1324645

Cited by 16 publications

(5 citation statements)

References 31 publications

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“…In the system of BPLC, once the small size of free-moving CDs are trapped in the high-energy defect lines, the free energy and volume energy around the fault line will thus be reduced. This results in a stable spatial arrangement structure of the blue phase and enhanced thermodynamic stability of the CDs-BPLCs [35,43]. Figure 3(a) shows the changes in the temperature domain range of BPLCs with different CDs doping concentrations.…”

Section: Resultsmentioning

confidence: 99%

Carbon dots stabilized photoluminescent blue phase liquid crystals

Chen,

Cui,

Duan

et al. 2023

Nanotechnology

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Blue phase liquid crystals (BPLCs) have significant potential in the field of liquid crystal displays (LCDs) and are proposed as potential next-generation of LCDs candidates. However, BPLCs do not emit light directly and need an extra backlight device. As a result, the blue phase liquid crystal display (BPLCD) retains the disadvantages of low brightness and low energy efficiency, which remarkably limit its application. Recently, as a kind of novel fluorescent carbon nanomaterials, carbon dots (CDs) have captured considerable attention because of their excellent optical properties. Here, CDs were directly synthesized by a simple solvothermal method and introduced into BPLCs. By combining the excellent optical properties of CDs with the blue phase liquid crystal system, the photoluminescent blue phase liquid crystals (CDs-BPLCs) with self-photoluminescence are prepared. Meanwhile, the stability of blue phase liquid crystals can be improved by CDs. Such CDs-BPLCs have enormous potential in the development of novel energy-saving display devices.

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Section: Resultsmentioning

confidence: 99%

Carbon dots stabilized photoluminescent blue phase liquid crystals

Chen,

Cui,

Duan

et al. 2023

Nanotechnology

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“…BP stabilization driven by spherical NPs is reported in several other studies in literature. The NP cores are composed of ZnS, Ni, MnO 2 , Fe 3 O 4 , and SiO 2 , and the sizes range from 2 nm to over 100 nm [46][47][48][49][50][51][52]. The effect is mostly on LC materials exhibiting BPI and, in few cases, BPII.…”

Section: Discussionmentioning

confidence: 99%

“…The first reports came out almost simultaneously for spherical Au nanoparticles dispersed in a LC/chiral dopant mixture [43] and CdSe quantum dots (QDs) [44,45] dispersed in single LC compounds. Subsequent studies used additional types of spherical NPs and QDs, by varying the core composition and diameter, as well as the surface functionalization [46][47][48][49][50][51][52]. Apart from the stabilization effect, it has been also reported that NPs could improve the electro-optical performance of blue phase-based optical displays [53].…”

Section: Introductionmentioning

confidence: 99%

Quantum Dot-Driven Stabilization of Liquid-Crystalline Blue Phases

et al. 2020

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Liquid crystals hosting nanoparticles comprise a fascinating research field, ranging from fundamental aspects of phase transitions to applications in optics and photonics. Liquid-crystalline phases exhibit topological defects that can be used for assembly of nanoparticles in periodical arrays, and at the same time, the nanoparticles can increase the stability range of liquid-crystalline phases. This has been experimentally demonstrated over the past few years in the case of blue phases that are present in some strongly chiral liquid crystals. Experimental results in quantum dot-driven blue phase stabilization are presented here by means of high-resolution calorimetry and polarizing optical microscopy. It is demonstrated that quantum dots essentially stabilize the macroscopically amorphous blue phase III. There are discussed similarities and differences between the effects of spherical and anisotropic nanoparticles on blue phase stabilization; moreover, future prospects and trends in the field are addressed.

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“…The strategy of dispersing spherical NPs in chiral LCs has been widely adopted regarding BP stabilization over the last ten years. Spherical NPs and colloids in a broad range of sizes (from the smallest NPs of 2 nm to the largest colloids of 1.5 µm) and cores composed of Au, MnO 2 , ZhS, BaTiO 3 , CdSe, PbS, Fe 3 O 4 , SiO 2 , and Ni, have been exploited as stabilization agents [58,[84][85][86][87][88][89][90][91][92][93][94]. It is rather impossible to directly compare all these studies because of: (a) essentially different LC hosts (ranging from pure compounds to LC mixtures of variable chemical compositions), (b) NP core composition, size and coating, and (c) different methodologies.…”

Section: Other Studies On Nanoparticle-driven Stabilization Of Blue Phases and Twist-grain Boundary Phasesmentioning

confidence: 99%

Experimental Advances in Nanoparticle-Driven Stabilization of Liquid-Crystalline Blue Phases and Twist-Grain Boundary Phases

et al. 2021

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Recent advances in experimental studies of nanoparticle-driven stabilization of chiral liquid-crystalline phases are highlighted. The stabilization is achieved via the nanoparticles’ assembly in the defect lattices of the soft liquid-crystalline hosts. This is of significant importance for understanding the interactions of nanoparticles with topological defects and for envisioned technological applications. We demonstrate that blue phases are stabilized and twist-grain boundary phases are induced by dispersing surface-functionalized CdSSe quantum dots, spherical Au nanoparticles, as well as MoS2 nanoplatelets and reduced-graphene oxide nanosheets in chiral liquid crystals. Phase diagrams are shown based on calorimetric and optical measurements. Our findings related to the role of the nanoparticle core composition, size, shape, and surface coating on the stabilization effect are presented, followed by an overview of and comparison with other related studies in the literature. Moreover, the key points of the underlying mechanisms are summarized and prospects in the field are briefly discussed.

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The effects of silica nanoparticles on blue-phase liquid crystals

Cited by 16 publications

References 31 publications

Carbon dots stabilized photoluminescent blue phase liquid crystals

Carbon dots stabilized photoluminescent blue phase liquid crystals

Quantum Dot-Driven Stabilization of Liquid-Crystalline Blue Phases

Experimental Advances in Nanoparticle-Driven Stabilization of Liquid-Crystalline Blue Phases and Twist-Grain Boundary Phases

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