Article
Chemistry, Physical
K. P. Praseetha, E. Shiju, K. Chandrasekharan, Soney Varghese
Summary: This study focuses on the third order optical nonlinearity of zinc sulfide quantum dot doped nematic liquid crystals. Experimental methods were used to determine the nonlinear absorption coefficient and nonlinear refraction coefficient of the samples, and the observed increase in optical nonlinearity and related mechanisms were discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Xinlan Tan, Ya Chen, Huaguang Wang, Zexin Zhang, Xinsheng Sean Ling
Summary: By using an external magnetic field to assist a colloidal system of super-paramagnetic anisotropic particles, researchers have successfully overcome the local free energy barriers in metastable states and approached the equilibrium phase, demonstrating a 2D isotropic-nematic phase transition with increasing packing density. The study explored the effects of anisotropy of colloidal particles on the 2D isotropic-nematic transition, comparing experimental results with previous computational work and reaching quantitative agreements.
Article
Multidisciplinary Sciences
Jinghua Jiang, Xinyu Wang, Oluwafemi Isaac Akomolafe, Wentao Tang, Zhawure Asilehan, Kamal Ranabhat, Rui Zhang, Chenhui Peng
Summary: Scientists have designed synthetic molecular motors inspired by nanomotors in nature to drive the motion of microscale objects through cooperative reorganization. In this study, topological vortices are imprinted in monolayers of azobenzene molecules, which induce the collective motion of liquid crystal molecules and the spatiotemporal evolutions of nematic disclination networks. The collective transport and reconfiguration of colloidal assemblies can be controlled by manipulating the irradiated polarization, opening opportunities for programmable colloidal machines and smart composite materials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Materials Science, Multidisciplinary
Prabir K. Mukherjee
Summary: The nematic to isotropic phase transition in mixtures of nematic liquid crystal and quantum dots nanoparticles has been studied. The effects of quantum dots nanoparticles on the nematic order parameter, transition temperature, and splay elastic constant were discussed. The results showed a decrease in the nematic order parameter, transition temperature, and splay elastic constant with the increase in volume fraction of quantum dots nanoparticles.
Article
Physics, Multidisciplinary
Ping Wu, Yubing Tu, Zhuying Wang, Shuikang Yu, Hongyu Li, Wanru Ma, Zuowei Liang, Yunmei Zhang, Xuechen Zhang, Zeyu Li, Ye Yang, Zhenhua Qiao, Jianjun Ying, Tao Wu, Lei Shan, Ziji Xiang, Zhenyu Wang, Xianhui Chen
Summary: The observation of unidirectional electron-phonon coupling in a kagome lattice material suggests a strong link between superconductivity and the nematic state in that class of materials. Understanding the nature of the nematic state and its consequences for the electronic band structure and superconductivity has become a key issue in condensed matter physics.
Article
Chemistry, Multidisciplinary
Martin Haehsler, Hajnalka Nadasi, Martin Feneberg, Sebastian Marino, Frank Giesselmann, Silke Behrens, Alexey Eremin
Summary: Self-assembly is a crucial mechanism for designing multifunctional materials, especially in soft hybrid materials where components of different natures interact to form structures with specific functions. A novel magnetic hybrid material was demonstrated, showing the manipulation of molecular tilt through a delicate balance between topologically-assisted colloidal self-assembly of magnetic nanoparticles and anisotropic molecular interactions in a liquid crystal matrix.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Baihong Chen, Changyue Liu, Zengting Xu, Zhijian Wang, Rui Xiao
Summary: In this study, both polydomain and monodomain liquid crystal elastomers (LCEs) were synthesized and their shape change with temperature under a certain stress level was characterized. A thermo-order-mechanical coupling model was developed to predict the shape change of LCEs, showing good consistency with experimental results.
MECHANICS OF MATERIALS
(2024)
Article
Chemistry, Multidisciplinary
Shweta Mishra, V. Manjuladevi, R. K. Gupta, Sandeep Kumar
Summary: By incorporating CdS nanowires into nematic liquid crystal, the weakly first-order discontinuous isotropic-nematic phase transition evolves into a continuous phase transition, affecting the dielectric permittivity and bulk conductivity. In addition, the nanocomposites show increased ionic conductivity with higher concentrations of CdS nanowires.
Article
Chemistry, Multidisciplinary
Beibei Wang, Bangqi Yin, Zhao Zhang, Yixuan Yin, Yang Yang, Haiqiao Wang, Thomas P. Russell, Shaowei Shi
Summary: By using the interactions between nanoparticles and polymeric ligands, nanoparticle surfactants can be generated at the liquid-liquid interface, increasing the binding energy. Through a simplified model, it is found that competitive ligands can reduce the binding energy, leading to the dissociation and disassembly of the surfactants at the interface and allowing the construction of responsive and reconfigurable all-liquid systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Ali Ghanadzadeh Gilani, Nazanin Khoshroo, Przemyslaw Kula, Natan Rychlowicz
Summary: The phase diagrams and optical properties of a series of nematic binary mixtures composed of 9CHBT and 11CHBT were investigated. The study revealed unique temperature characteristics and optical properties of the eutectic mixture.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
M. A. Aliev, N. Yu Kuzminyh, E. A. Ugolkova
Summary: The nematic ordering of a racemic mixture and an enantiopure melt of trimer chains were inspected within the Landau theory of phase transitions. It was found that the phase diagrams for a racemic mixture may contain regions of stability of isotropic, prolate uniaxial, oblate uniaxial, and biaxial nematic phases depending on the values of angles and monomer unit fractions. Chiral nematic states are found for an enantiopure melt, depending on the architecture of the chains.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Multidisciplinary Sciences
Runa Koizumi, Dmitry Golovaty, Ali Alqarni, Bing-Xiang Li, Peter J. Sternberg, Oleg D. Lavrentovich
Summary: The morphogenesis of living systems involves unusual topological shape transformations. In this study, a droplet of a nematic liquid crystal changes its equilibrium shape from a simply connected tactoid to a torus. This topological transformation is caused by the interplay of nematic elastic constants, facilitating splay and bend of molecular orientations in tactoids but hindering splay in toroids. This elastic anisotropy mechanism provides insights into topology transformations in morphogenesis and opens possibilities for controlling and transforming the shapes of liquid crystal droplets and related soft materials.
Article
Chemistry, Multidisciplinary
Mitsuaki Yamauchi, Seiya Yamamoto, Sadahiro Masuo
Summary: The study demonstrates a novel supramolecular coassembly system that forms highly ordered QD arrangement structures via self-assembly, enabling photocontrollable photoluminescence properties. The assembled system undergoes structural changes under light, but recovers its original structure and properties over time.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Paniz Rahmani, Melissa Goodlad, Yehan Zhang, Yichen Li, Tao Ye
Summary: This study develops a one-step ligand-exchange method to produce water-soluble QD-DNA conjugates with high photoluminescence. These bioconjugates can be used for DNA-directed self assembly and demonstrated fluorescence quenching by adjacent gold nanoparticles. Such QD-AuNP dimers can serve as biosensors with improved sensitivity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Kousuke Ishida, Yugo Onishi, Masaya Tsujii, Kiyotaka Mukasa, Mingwei Qiu, Mikihiko Saito, Yuichi Sugimura, Kohei Matsuura, Yuta Mizukami, Kenichiro Hashimoto, Takasada Shibauchi
Summary: This study demonstrates the presence of a diverging nematic susceptibility electronic nematic QCP in nonmagnetic FeSe1-x Te-x. In contrast to FeSe1-x S-x, FeSe1-x Te-x exhibits a superconducting dome centered at the QCP. This difference is related to the relative strength of nematic and spin fluctuations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Meeting Abstract
Biophysics
Amanda J. Tan, Eric Roberts, Kevin A. Mitchell, Linda S. Hirst
BIOPHYSICAL JOURNAL
(2018)
Article
Multidisciplinary Sciences
Sheida T. Riahinasab, Amir Keshavarz, Charles N. Melton, Ahmed Elbaradei, Gabrielle Warren, Robin L. B. Selinger, Benjamin J. Stokes, Linda S. Hirst
NATURE COMMUNICATIONS
(2019)
Article
Multidisciplinary Sciences
Joseph Lopes, David A. Quint, Dail E. Chapman, Melissa Xu, Ajay Gopinathan, Linda S. Hirst
SCIENTIFIC REPORTS
(2019)
Article
Physics, Multidisciplinary
Amanda J. Tan, Eric Roberts, Spencer A. Smith, Ulyses Alvarado Olvera, Jorge Arteaga, Sam Fortini, Kevin A. Mitchell, Linda S. Hirst
Article
Multidisciplinary Sciences
Mark Bartolo, Jussi J. Amaral, Linda S. Hirst, Sayantani Ghosh
SCIENTIFIC REPORTS
(2019)
Article
Mathematics, Applied
Kevin A. Mitchell, Amanda J. Tan, Jorge Arteaga, Linda S. Hirst
Summary: Active fluids composed of self-propelled agents can generate complex large-scale coherent flows. Laboratory realization of such fluids with microtubules driven by motor proteins exhibits chaotic advection and pronounced fractal structures. The power spectrum decays as k(-beta) for large wavenumbers in these systems, and a mathematical model based on local compressibility and periodic injection of density variations reproduces this behavior.
Article
Multidisciplinary Sciences
Kristian Thijssen, Dimitrius A. Khaladj, S. Ali Aghvami, Mohamed Amine Gharbi, Seth Fraden, Julia M. Yeomans, Linda S. Hirst, Tyler N. Shendruk
Summary: The coupling between flows and material properties makes rheological matter widely applicable, and the study proposes a method for controlling flow, topology, and composition within active films by using micropatterned structures within an underlying oil layer to establish rheological coupling.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Molly Phillips, Alauna C. Wheeler, Matthew J. Robinson, Valerie Leppert, Manping Jia, Marco Rolandi, Linda S. Hirst, Chris T. Amemiya
Summary: Cartilaginous fishes have gel-filled sensory organs called Ampullae of Lorenzini (AoL) to detect electric fields. The study found that while proteins are responsible for the viscosity of the gel, their removal did not affect proton conductivity. Further research is needed to explore specific molecular interactions inside AoL gel at the nanoscale.
Article
Multidisciplinary Sciences
Fereshteh L. Memarian, Joseph D. Lopes, Fabian Jan Schwarzendahl, Madhuvanthi Guruprasad Athani, Niranjan Sarpangala, Ajay Gopinathan, Daniel A. Beller, Kinjal Dasbiswas, Linda S. Hirst
Summary: The study demonstrates the formation of dynamic lanes and long-range active nematic alignment by directly coupling kinesin motors to a lipid bilayer during microtubule gliding. The lipid membrane promotes filament-filament alignment and enhances globally aligned active nematic state formation.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Physical
Devika Gireesan Sudha, Jocelyn Ochoa, Linda S. Hirst
Summary: A study on using self-assembling colloidal system to investigate particle aggregation in liquid crystal is presented, observing aggregate structure changes with temperature variations and exploring driving mechanisms using fluorescence microscopy. The analysis suggests that aggregate dynamics depend on a combination of factors.
Proceedings Paper
Crystallography
Dimitrius A. Khaladj, Amanda J. Tan, Linda S. Hirst
LIQUID CRYSTALS XXIII
(2019)
Article
Nanoscience & Nanotechnology
Amir Keshavarz, Sheida T. Riahinasab, Linda S. Hirst, Benjamin J. Stokes
ACS APPLIED NANO MATERIALS
(2019)
Article
Physics, Fluids & Plasmas
Noe Atzin, Orlando Guzman, Oscar Gutierrez, Linda S. Hirst, Sayantani Ghosh
Article
Physics, Fluids & Plasmas
Andrew DeBenedictis, Timothy J. Atherton, Andrea L. Rodarte, Linda S. Hirst