RIKEN Center for Emergent Matter Science (CEMS) 5 articles published in JoVE Chemistry High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal Satoshi Aya1, Péter Salamon2, Daniel A. Paterson3, John M. D. Storey3, Corrie T. Imrie3, Fumito Araoka1, Antal Jákli4, Ágnes Buka2 1RIKEN Center for Emergent Matter Science (CEMS), 2Institute for Solid State Physics and Optics, Wigner Research Center for Physics, Hungarian Academy of Sciences, 3Department of Chemistry, School of Natural and Computing Sciences, University of Aberdeen, 4Chemical Physics Interdisciplinary Program and Liquid Crystal Institute, Kent State University This protocol demonstrates the preparation of a photorheological material that exhibits a solid phase, various liquid crystalline phases, and an isotropic liquid phase by increasing temperature. Presented here are methods for measuring the structure-viscoelasticity relationship of the material. Chemistry An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation Shoichi Tokunaga*1, Mengyan Zeng*1,2, Yoshimitsu Itoh1, Fumito Araoka3, Takuzo Aida3 1Department of Chemistry and Biotechnology, The University of Tokyo, 2Department of Chemistry, Tsinghua University, 3RIKEN Center for Emergent Matter Science A protocol for the fabrication of a reflective cholesteric liquid crystalline display device containing a redox-responsive chiral dopant allowing quick and low-voltage operation is presented. Chemistry Spatiotemporally Controlled Nuclear Translocation of Guests in Living Cells Using Caged Molecular Glues as Photoactivatable Tags Rina Mogaki1, Kou Okuro1, Akio Arisaka1, Takuzo Aida1,2 1Department of Chemistry and Biotechnology, School of Engineering, University of Tokyo, 2Riken Center for Emergent Matter Science This protocol describes light-triggered nuclear translocation of guests in living cells using caged molecular glue tags. This method is promising for site-selective nuclear-targeting drug delivery. Engineering Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating Feng Qin1, Toshiya Ideue1, Wu Shi2, Yijin Zhang3,4, Ryuji Suzuki1, Masaro Yoshida5, Yu Saito1, Yoshihiro Iwasa1,5 1Quantum-Phase Electronics Center (QPEC) and Department of Applied Physics, The University of Tokyo, 2Materials Sciences Division, Lawrence Berkeley National Laboratory, 3Institute of Scientific and Industrial Research, Osaka University, 4Max Planck Institute for Solid State Research, 5RIKEN Center for Emergent Matter Science (CEMS) Here, we present a protocol to control the carrier number in solids by using the electrolyte. Engineering Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets Satoshi Aya1, Fumito Araoka1 1RIKEN Center for Emergent Matter Science (CEMS) Here, we present a protocol to trigger an orientational transition of a liquid crystal in response to temperature. Methodologies are described for preparing a sample in order to observe the transition and the detailed transitional evolution.
