1
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Malotke F, Thiele T, Gutmann JS, Giese M. Direct Digital Photonic Patterning of Hydrogen-Bonded Cholesteric Liquid-Crystalline Films. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37917042 DOI: 10.1021/acsami.3c10684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
A modular tool box for photoresponsive cholesteric liquid crystals based on hydrogen-bonded assemblies is reported. By employing 3-azopyridines as photoswitch in cholesteric liquid-crystalline thin films, a fast and reversible blue shift is observed upon irradiation, allowing tuning of the structural color over the whole visible electromagnetic spectrum. Investigations of the materials via X-ray diffraction studies indicate that the blue shift is attributed to the photoinduced destruction of smectic clusters in the cholesteric phase, resulting in a contraction of the helical structure. Unprecedently, the use of a stereolithography 3D printer (SLA) allowed direct transfer of digital information into a multicolor photonic pattern, an important step toward photonic imaging and data storage.
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Affiliation(s)
- Florian Malotke
- University of Duisburg-Essen, Universitätsstr. 7, 45141 Essen, Germany
| | - Tobias Thiele
- University of Duisburg-Essen, Universitätsstr. 7, 45141 Essen, Germany
| | - Jochen S Gutmann
- University of Duisburg-Essen, Universitätsstr. 7, 45141 Essen, Germany
| | - Michael Giese
- University of Duisburg-Essen, Universitätsstr. 7, 45141 Essen, Germany
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2
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He Y, Zhang S, Bisoyi HK, Qiao J, Chen H, Gao J, Guo J, Li Q. Irradiation‐Wavelength Directing Circularly Polarized Luminescence in Self‐Organized Helical Superstructures Enabled by Hydrogen‐Bonded Chiral Fluorescent Molecular Switches. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111344] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yanrong He
- Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Education College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Shu Zhang
- Institute of Advanced Materials School of Chemistry and Chemical Engineering Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research Southeast University Nanjing 211189 China
| | - Hari Krishna Bisoyi
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent Ohio 44242 USA
| | - Jinghui Qiao
- Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Education College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Hong Chen
- Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Education College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - JingJing Gao
- Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Education College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers Ministry of Education College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Quan Li
- Institute of Advanced Materials School of Chemistry and Chemical Engineering Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research Southeast University Nanjing 211189 China
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent Ohio 44242 USA
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3
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He Y, Zhang S, Bisoyi HK, Qiao J, Chen H, Gao J, Guo J, Li Q. Irradiation-Wavelength Directing Circularly Polarized Luminescence in Self-Organized Helical Superstructures Enabled by Hydrogen-Bonded Chiral Fluorescent Molecular Switches. Angew Chem Int Ed Engl 2021; 60:27158-27163. [PMID: 34549501 DOI: 10.1002/anie.202111344] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Indexed: 12/31/2022]
Abstract
Two light-driven chiral fluorescent molecular switches, (R,S,R)-switch 1 and (R,S,R)-switch 2, are prepared by means of hydrogen-bonded (H-bonded) assembly of a photoresponsive (S) chiral fluorescent molecule, respectively with a cyano substitution at different positions as an H-bond acceptor and an opposite (R) chiral molecule as an H-bond donor. The resulting two switches exhibit tunable and reversible Z/E photoisomerization irradiated with 450 nm blue and 365 nm UV light. When doped into an achiral liquid crystal, both switches are found to be able to form a CPL tunable luminescent helical superstructure. In contrast to the tunable CPL characteristics of the system incorporating switch 2, exposure of the system incorporating switch 1 to 365 nm and 450 nm radiation can lead to controllable different photostationary CPL behavior, including switching-off and polarization inversion. In addition, optical information coding is demonstrated using the system containing switch 1.
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Affiliation(s)
- Yanrong He
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Shu Zhang
- Institute of Advanced Materials, School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University, Nanjing, 211189, China
| | - Hari Krishna Bisoyi
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio, 44242, USA
| | - Jinghui Qiao
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Hong Chen
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - JingJing Gao
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Quan Li
- Institute of Advanced Materials, School of Chemistry and Chemical Engineering, Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research, Southeast University, Nanjing, 211189, China.,Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio, 44242, USA
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4
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Juan A, Lin S, He Y, Fan Q, Guo J. Near-infrared light-induced photoisomerization and photodissociation of a chiral fluorescent photoswitch in cholesteric liquid crystals assisted by upconversion nanoparticles. SOFT MATTER 2021; 17:1404-1408. [PMID: 33325967 DOI: 10.1039/d0sm02109a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Upconversion-luminescence-induced reflective color switching and fluorescence tuning of a cholesteric liquid crystal (CLC) cells were investigated. The CLC system was constructed by co-doping a chiral fluorescence photoswitch, switch 5, and upconversion nanoparticles (UCNPs) into nematic LC media. Under irradiation with 980 nm NIR light, the UCNPs emit both 450 nm blue light and 365 nm UV light to induce the simultaneous Z-to-E and E-to-Z photoisomerization of switch 5. This continuous rotation-inversion movement further leads to an irreversible photoisomerization and photodissociation of dicyanodistyrylthiophene moieties in switch 5. As a result, the reflective color of the CLC cell changed from blue to red and the fluorescence intensity decreased as well when exposed to 980 nm NIR light. Finally, optically written reflective-photoluminescent dual mode CLC cells were further demonstrated.
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Affiliation(s)
- Ao Juan
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Siyang Lin
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Yanrong He
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Qingyan Fan
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
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5
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Wang L, Urbas AM, Li Q. Nature-Inspired Emerging Chiral Liquid Crystal Nanostructures: From Molecular Self-Assembly to DNA Mesophase and Nanocolloids. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1801335. [PMID: 30160812 DOI: 10.1002/adma.201801335] [Citation(s) in RCA: 160] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/17/2018] [Indexed: 05/22/2023]
Abstract
Liquid crystals (LCs) are omnipresent in living matter, whose chirality is an elegant and distinct feature in certain plant tissues, the cuticles of crabs, beetles, arthropods, and beyond. Taking inspiration from nature, researchers have recently devoted extensive efforts toward developing chiral liquid crystalline materials with self-organized nanostructures and exploring their potential applications in diverse fields ranging from dynamic photonics to energy and safety issues. In this review, an account on the state of the art of emerging chiral liquid crystalline nanostructured materials and their technological applications is provided. First, an overview on the significance of chiral liquid crystalline architectures in various living systems is given. Then, the recent significant progress in different chiral liquid crystalline systems including thermotropic LCs (cholesteric LCs, cubic blue phases, achiral bent-core LCs, etc.) and lyotropic LCs (DNA LCs, nanocellulose LCs, and graphene oxide LCs) is showcased. The review concludes with a perspective on the future scope, opportunities, and challenges in these truly advanced functional soft materials and their promising applications.
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Affiliation(s)
- Ling Wang
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, USA
| | - Augustine M Urbas
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, 45433, USA
| | - Quan Li
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, USA
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6
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Paul T, Saha J. Origin and structure of liquid crystalline Blue Phase III. Sci Rep 2020; 10:16016. [PMID: 32994422 PMCID: PMC7525552 DOI: 10.1038/s41598-020-72086-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 08/24/2020] [Indexed: 12/02/2022] Open
Abstract
We report here an off-lattice NVT molecular dynamics simulation study of a system of polar chiral ellipsoidal molecules, which spontaneously exhibits Blue Phase III (BPIII), considering coarse-grained attractive-repulsive pair interaction appropriate for anisotropic liquid crystal mesogens. We have observed that suitable selection of chiral and dipolar strengths not only gives rise to thermodynamically stable BPIII but novel Smectic and Bilayered BPIII as well. Further, we have demonstrated that the occurrence of BPIII and its layered counterparts depend crucially on molecular elongation.
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Affiliation(s)
- Tanay Paul
- Department of Physics, University of Calcutta, 92, A. P. C. Road, Kolkata, 700009, India
| | - Jayashree Saha
- Department of Physics, University of Calcutta, 92, A. P. C. Road, Kolkata, 700009, India.
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7
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Li J, Bisoyi HK, Lin S, Guo J, Li Q. 1,2-Dithienyldicyanoethene-Based, Visible-Light-Driven, Chiral Fluorescent Molecular Switch: Rewritable Multimodal Photonic Devices. Angew Chem Int Ed Engl 2019; 58:16052-16056. [PMID: 31487106 DOI: 10.1002/anie.201908832] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Indexed: 12/20/2022]
Abstract
Reported here is the first example of a 1,2-dithienyldicyanoethene-based visible-light-driven chiral fluorescent molecular switch that exhibits reversible trans to cis photoisomerization. The trans form in solution almost completely transforms into the cis form, accompanied by a 10-fold decrease in its fluorescence intensity within 60 seconds when exposed to green light (520 nm). The reverse isomerization proceeds upon irradiation with blue light (405 nm). When doped into commercially available achiral liquid crystal hosts, this molecular switch efficiently induces luminescent helical superstructures, that is, a cholesteric phase. The intensity of the circularly polarized fluorescence as well as the selective reflection wavelength of the induced cholesteric phases can be reversibly tuned using visible light of two different wavelengths. Optically rewritable photonic devices using cholesteric films containing this molecular switch are described.
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Affiliation(s)
- Juntao Li
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Hari Krishna Bisoyi
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, USA
| | - Siyang Lin
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education, and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Quan Li
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, USA
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8
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Li J, Bisoyi HK, Lin S, Guo J, Li Q. 1,2‐Dithienyldicyanoethene‐Based, Visible‐Light‐Driven, Chiral Fluorescent Molecular Switch: Rewritable Multimodal Photonic Devices. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908832] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Juntao Li
- Key Laboratory of Carbon Fibers and Functional PolymersMinistry of Education, and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Hari Krishna Bisoyi
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary ProgramKent State University Kent OH 44242 USA
| | - Siyang Lin
- Key Laboratory of Carbon Fibers and Functional PolymersMinistry of Education, and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional PolymersMinistry of Education, and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Quan Li
- Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary ProgramKent State University Kent OH 44242 USA
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9
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Kim Y, Tamaoki N. Photoresponsive Chiral Dopants: Light‐Driven Helicity Manipulation in Cholesteric Liquid Crystals for Optical and Mechanical Functions. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900034] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuna Kim
- Research Institute for Electronic ScienceHokkaido University N-20, W-10, Kita-Ku, Sapporo Hokkaido 001-0020 JAPAN
| | - Nobuyuki Tamaoki
- Research Institute for Electronic ScienceHokkaido University N-20, W-10, Kita-Ku, Sapporo Hokkaido 001-0020 JAPAN
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10
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Lin S, Li J, Krishna Bisoyi H, Juan A, Guo J, Li Q. Dicyanodistyrylthiophene‐Based Emissive Chiral Photoswitches: Effect of the Position of the Cyano Group on Reversible Photoisomerization and Fatigue Resistance. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201800250] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Siyang Lin
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Juntao Li
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Hari Krishna Bisoyi
- Liquid Crystal Institute and Chemical Physics Interdisciplinary ProgramKent State University Kent, Ohio 44242 USA
| | - Ao Juan
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers and College of Materials Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Quan Li
- Liquid Crystal Institute and Chemical Physics Interdisciplinary ProgramKent State University Kent, Ohio 44242 USA
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11
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Unclogging electron-transporting channels via self-assembly for improving light harvesting and stability of dye-sensitized solar cells. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Li J, Bisoyi HK, Tian J, Guo J, Li Q. Optically Rewritable Transparent Liquid Crystal Displays Enabled by Light-Driven Chiral Fluorescent Molecular Switches. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1807751. [PMID: 30633403 DOI: 10.1002/adma.201807751] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 12/14/2018] [Indexed: 06/09/2023]
Abstract
Functional soft materials exhibiting distinct functionalities in response to a specific stimulus are highly desirable towards the fabrication of advanced devices with superior dynamic performances. Herein, two novel light-driven chiral fluorescent molecular switches have been designed and synthesized that are able to exhibit unprecedented reversible Z/E photoisomerization behavior along with tunable fluorescence intensity in both isotropic and anisotropic media. Cholesteric liquid crystals fabricated using these new fluorescent molecular switches as chiral dopants exhibit reversible reflection color tuning spanning the visible and infrared region of the spectrum. Transparent display devices have been fabricated using both low chirality and high chirality cholesteric films that operate either exclusively in fluorescent mode or in both fluorescent and reflection mode, respectively. The dual mode display device employing short pitch cholesteric film is able to function on demand under all ambient light conditions including daylight and darkness with fast response and high resolution. Moreover, the proof-of-concept for a "remote-writing board" using cholesteric films containing one of the light-driven chiral fluorescent molecular switches with ease of fabrication and operation is disclosed herein. Such optically rewritable transparent display devices enabled by light-driven chiral fluorescent molecular switches pave a new way for developing novel display technology under different lighting conditions.
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Affiliation(s)
- Juntao Li
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education; College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Hari Krishna Bisoyi
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, USA
| | - Jiajun Tian
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education; College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers, Ministry of Education; College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Quan Li
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, OH, 44242, USA
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13
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Qiao J, Lin S, Li J, Tian J, Guo J. Reversible chirality inversion of circularly polarized luminescence in a photo-invertible helical cholesteric superstructure. Chem Commun (Camb) 2019; 55:14590-14593. [DOI: 10.1039/c9cc08090b] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The first example of photo-driven reversible chirality inversion of circularly polarized luminescence in a helical cholesteric superstructure is reported.
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Affiliation(s)
- Jinghui Qiao
- Key Laboratory of Carbon Fibers and Functional Polymers
- Ministry of Education, and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Siyang Lin
- Key Laboratory of Carbon Fibers and Functional Polymers
- Ministry of Education, and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Juntao Li
- Key Laboratory of Carbon Fibers and Functional Polymers
- Ministry of Education, and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jiajun Tian
- Key Laboratory of Carbon Fibers and Functional Polymers
- Ministry of Education, and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jinbao Guo
- Key Laboratory of Carbon Fibers and Functional Polymers
- Ministry of Education, and College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
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14
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Wang L, Chen D, Gutierrez-Cuevas KG, Bisoyi HK, Fan J, Zola RS, Li G, Urbas AM, Bunning TJ, Weitz DA, Li Q. Optically Reconfigurable Chiral Microspheres of Self-Organized Helical Superstructures with Handedness Inversion. MATERIALS HORIZONS 2017; 4:1190-1195. [PMID: 29403644 PMCID: PMC5796552 DOI: 10.1039/c7mh00644f] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Optically reconfigurable monodisperse chiral microspheres of self-organized helical superstructures with dynamic chirality were fabricated via a capillary-based microfluidic technique. Light-driven handedness-invertible transformations between different configurations of microspheres were vividly observed and optically tunable RGB photonic cross-communications among the microspheres were demonstrated.
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Affiliation(s)
- Ling Wang
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, United States
| | - Dong Chen
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Karla G. Gutierrez-Cuevas
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, United States
| | - Hari Krishna Bisoyi
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, United States
| | - Jing Fan
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Rafael S. Zola
- Departamento de Física, Universidade Tecnológica Federal do Paraná-Apucarana, PR 86812-460, Brazil
| | - Guoqiang Li
- Department of Ophthalmology and Visual Science and Department of Electrical and Computer Engineering, Ohio State University, Columbus, OH 43212, United States
| | - Augustine M. Urbas
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
| | - Timothy J. Bunning
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433, United States
| | - David A. Weitz
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Quan Li
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio 44242, United States
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15
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Yu M, Wang L, Nemati H, Yang H, Bunning T, Yang DK. Effects of polymer network on electrically induced reflection band broadening of cholesteric liquid crystals. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24317] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Meina Yu
- Department of Materials Science and Engineering; College of Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University; Beijing 100871 People's Republic of China
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University; Kent Ohio 44242
| | - Ling Wang
- Department of Materials Science and Engineering; College of Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University; Beijing 100871 People's Republic of China
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University; Kent Ohio 44242
| | - Hossein Nemati
- Air Force Research Laboratory; Materials and Manufacturing Directorate, Wright Patterson Air Force Base; Ohio 45433
| | - Huai Yang
- Department of Materials Science and Engineering; College of Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University; Beijing 100871 People's Republic of China
| | - Timothy Bunning
- Air Force Research Laboratory; Materials and Manufacturing Directorate, Wright Patterson Air Force Base; Ohio 45433
| | - Deng-Ke Yang
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University; Kent Ohio 44242
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16
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Jo SY, Kim BC, Jeon SW, Bae JH, Walker M, Wilson M, Choi SW, Takezoe H. Enhancement of the helical twisting power with increasing the terminal chain length of nonchiral bent-core molecules doped in a chiral nematic liquid crystal. RSC Adv 2017. [DOI: 10.1039/c6ra27158h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We measured the helical twisting power (HTP) of nonchiral bent-core molecules doped in a chiral nematic liquid crystal, and found that HTP increases with the terminal chain length.
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Affiliation(s)
- Seong-Yong Jo
- Department of Advanced Materials Engineering for Information and Electronics (BK21Plus)
- Kyung Hee University
- Yongin-shi
- Korea
| | - Byeong-Cheon Kim
- Department of Advanced Materials Engineering for Information and Electronics (BK21Plus)
- Kyung Hee University
- Yongin-shi
- Korea
| | - Sung-Wook Jeon
- Department of Advanced Materials Engineering for Information and Electronics (BK21Plus)
- Kyung Hee University
- Yongin-shi
- Korea
| | - Jae-Hyun Bae
- Department of Advanced Materials Engineering for Information and Electronics (BK21Plus)
- Kyung Hee University
- Yongin-shi
- Korea
| | | | | | - Suk-Won Choi
- Department of Advanced Materials Engineering for Information and Electronics (BK21Plus)
- Kyung Hee University
- Yongin-shi
- Korea
| | - Hideo Takezoe
- Toyota Physical and Chemical Research Institute
- Nagakute
- Japan
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17
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Yu M, Zhou X, Jiang J, Yang H, Yang DK. Matched elastic constants for a perfect helical planar state and a fast switching time in chiral nematic liquid crystals. SOFT MATTER 2016; 12:4483-4488. [PMID: 27116620 DOI: 10.1039/c6sm00546b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Chiral nematic liquid crystals possess a self-assembled helical structure and exhibit unique selective reflection in visible and infrared light regions. Their optical properties can be electrically tuned. The tuning involves the unwinding and restoring of the helical structure. We carried out an experimental study on the mechanism of the restoration of the helical structure. We constructed chiral nematic liquid crystals with variable elastic constants by doping bent-dimers and studied their impact on the restoration. With matched twist and bend elastic constants, the helical structure can be restored dramatically fast from the field-induced homeotropic state. Furthermore, defects can be eliminated to produce a perfect planar state which exhibits high selective reflection.
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Affiliation(s)
- Meina Yu
- Department of Materials Science and Engineering, College of Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, P. R. China and Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
| | - Xiaochen Zhou
- Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
| | - Jinghua Jiang
- Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
| | - Huai Yang
- Department of Materials Science and Engineering, College of Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, P. R. China
| | - Deng-Ke Yang
- Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
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18
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Bisoyi HK, Li Q. Light‐Directed Dynamic Chirality Inversion in Functional Self‐Organized Helical Superstructures. Angew Chem Int Ed Engl 2016; 55:2994-3010. [DOI: 10.1002/anie.201505520] [Citation(s) in RCA: 190] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 08/10/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Hari Krishna Bisoyi
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA
| | - Quan Li
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA
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19
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Bisoyi HK, Li Q. Lichtgesteuerte dynamische Chiralitätsumkehr in funktionalen selbstorganisierten helikalen Überstrukturen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201505520] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hari Krishna Bisoyi
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA
| | - Quan Li
- Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA
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