A self-assembled polyimide layer based on graphene quantum dots for ultrafast switching of liquid crystals

Graphene quantum dots (GQDs) with a large specific surface area, wide emission spectrum, and low toxicity are advantageous for biomedical and optoelectronic applications. Here, we present a facile method to simultaneously provide ultrafast electro-optical switching and strong vertical anchoring of l...

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Bibliographic Details
Published inMolecular Crystals and Liquid Crystals Vol. 739; no. 1; pp. 72 - 77
Main Authors Park, Chan Beom, Choi, Jin-Wook, Son, Seung-Rak, An, Jongil, Park, Jisung, Kim, Soyern, Lee, Jun Hyup
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 01.09.2022
Taylor & Francis Ltd
Subjects
Alkylation
Biocompatibility
Crystals
Graphene
Graphene quantum dots
interfacial self-assembly
Liquid crystals
Optical switching
Optoelectronics
polyimide layer
Quantum dots
Self-assembly
Toxicity
ultrafast switching
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Summary:Graphene quantum dots (GQDs) with a large specific surface area, wide emission spectrum, and low toxicity are advantageous for biomedical and optoelectronic applications. Here, we present a facile method to simultaneously provide ultrafast electro-optical switching and strong vertical anchoring of liquid crystals (LCs) using interfacial self-assembly between alkylated GQDs and polyimide (PI) layers in a closed LC device. The newly fabricated self-assembled PI layer with alkylated GQDs were simply fabricated by doping GQDs into the LC medium, and induced a stable and uniform homeotropic alignment of LCs. Moreover, this self-assembled layer provided a superfast switching speed for the device.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2022.2030100