A self-assembled polyimide layer based on graphene quantum dots for ultrafast switching of liquid crystals. Issue 1 (1st September 2022)

• Record Type: Journal Article
• Authors: Park, Chan Beom; Choi, Jin-Wook; Son, Seung-Rak; An, Jongil; Park, Jisung; Kim, Soyern; Lee, Jun Hyup
• Is Part Of: Molecular crystals and liquid crystals. Volume 739:Issue 1(2023)
• Page Start: 72
• Page End: 77
• Publication Date: 2022-09-01
• Subjects: Graphene quantum dots -- interfacial self-assembly -- liquid crystals -- polyimide layer -- ultrafast switching; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2022.2030100
• Languages: English
• ISSNs: 1542-1406

Abstract

Abstract: 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.