Liquid crytals (LCs) are probably the most exciting state of matter. They attract scientists across disciplines such as chemistry, physics, materials science, and engineering—theorists and experimentalists alike. These days, you can buy quite affordable LCD TV sets around the corner, but that's just one of the many things liquid crystals can do. The selection of recent research articles presented below illustrates the broad interest in this area of soft condensed matter.
J. W. Goodby, P. J. Collings, T. Kato, C. Tschierske, H. Gleeson,
Handbook of Liquid Crystals
2nd edition, Wiley-VCH, Weinheim, 2014.
Find all articles on liquid crystals in Wiley Online Library...
See the International Liquid Crystal Society's website.
The heart of the crystal: A dumbbell-shaped molecule R−C6H10−CH=CH−C6H4−CH=CH−C6H10−R (R=nC5H11) generates a liquid crystal phase (X phase) between two N phases. The X phase was investigated by X-ray diffraction, scanning electron microscopy, atomic force microscopy and molecular dynamics simulation. A self-organization mechanism is postulated for formation of the layered structure.
Keiki Kishikawa, Yusuke Yamamoto, Go Watanabe, Ayaka Kawamura, Michinari Kohri, Tatsuo Taniguchi
Angew. Chem. Int. Ed., March 22, 2017, https://doi.org/10.1002/anie.201700809 Read article
To demonstrate remote-controllable actuators, a polynorbornene with dendronized azobenzene chromophores is synthesized by ring-opening metathesis polymerization.
Dae-Yoon Kim, Suyong Shin, Won-Jin Yoon, Yu-Jin Choi, Joo-Kyoung Hwang, Jin-Soo Kim, Cheul-Ro Lee, Tae-Lim Choi, Kwang-Un Jeong
Adv. Funct. Mater., March 17, 2017, https://doi.org/10.1002/adfm.201606294 Read article
Spatially-varying, surfactant-free, patterned alignmentof lyotropic chromonic liquid crystals (LCLCs) is demonstrated. The approach is based on photonic metamasks with a pattern of nanoslits that control the polarization of transmitted light. The aligning agent represents an azo dye with an additional layer of photopolymerizable mesogenic monomer that separates the dye from the LCLC while transfering the alignment pattern.
Chenhui Peng, Yubing Guo, Taras Turiv, Miao Jiang, Qi-Huo Wei, Oleg D. Lavrentovich
Adv. Mater., March 15, 2017, https://doi.org/10.1002/adma.201606112 Read article
In this review, smart windows are discussed which reflect excess of solar energy (infrared radiations) in summer and allow entrance into the building during winter, without interfering with visible light, to save significant amounts of energy in heating, cooling and lighting.
Hitesh Khandelwal, Albertus P. H. J. Schenning, Michael G. Debije
Adv. Energy Mater., March 02, 2017, https://doi.org/10.1002/aenm.201602209 Read article
A new liquid-crystalline (LC) n-channel organic semiconductor with a low LUMO (−4.19 eV) is developed based on a donor–acceptor–donor (D-A-D) π architecture (see picture). Solution-processed and low-temperature-annealed (50 °C) semiconductor thin films give field-effect transistors with a good electron mobility of 0.11 cm2 (V s)−1 and high Ion/Ioff ratios of 107 to 108 with excellent ambient stability.
Resul Ozdemir, Donghee Choi, Mehmet Ozdemir, Hyekyoung Kim, Sinem Tuncel Kostakoğlu, Mustafa Erkartal, Hyungsug Kim, Choongik Kim, Hakan Usta
ChemPhysChem, February 22, 2017, https://doi.org/10.1002/cphc.201601430 Read article
A controllable sol–gel strategy toward 2D silica composites: Based on the unique structure and properties of azoimidazolium combining from the imidazolium and the azobenzene unit, a light, thermal, substrate, and mechanical control of the orderliness and its anisotropy of 2D silica lamellar composites are achieved. A method to fabricate Au nanoparticles wrapped inside 2D silica layer is also derived.
Changxu Lin, Mengchun Xu, Wei Zhang, Long Yang, Zheng Xiang, Jinjian Hong, Xiangyang Liu
Adv. Mater. Interfaces, February 08, 2017, https://doi.org/10.1002/admi.201601249 Read article
Perfectly black in any viewing angle: An optically isotropic antiferroelectric liquid crystal display mode is realized by using ternary bent-core liquid crystal mixtures, forming a polar antiferroelectric tilted smectic phase. The newly developed mixtures show an ideal tilt of 45°, permitting perfect black in the transformed, electric-field OFF state, and switch under an applied electric field from below room temperature to 100 °C.
Leah Bergquist, Cuiyu Zhang, Roberta R. Ribeiro de Almeida, Brittany Pellegrene, Miroslaw Salamonczyk, Matthew Kim, Jung-Im Hwang, Kyeong-Jin Kim, Joun-Ho Lee, Antal Jákli, Torsten Hegmann
ChemistryOpen, February 07, 2017, https://doi.org/10.1002/open.201600138 Read article