Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Negatively surface-charged sulfate cellulose nanocrystals (CNCs) are always slowly self-assembled into left-handed cholesteric mesophases. In this work, macroscopic spiral patterns induced by counterclockwise vortex flowing or chiral doping were investigated. Results show that iridescent patterns of the arithmetic spiral, rose spiral, or latitude ripples were generated under the vortex rotation, indicating a severe microphase separation of CNCs. Moreover, the spiral pattern and rotational symmetry were highly correlated to the twisting and flowability of CNCs as well as chiral dopants. Alternatively, the cholesteric pitch and maximum reflective wavelength (λ) of CNCs were strongly increased by sinistral dopants other than the dextral ones, indicating an enhanced torsion of left-handed CNC mesophases by the dextral dopants. In addition, macroscopic spiral patterns distinctly existed in dextrally doped CNCs owing to a synergistic chiral enhancement. Therefore, the mechanochiral or chemical chiral transition from microscopic twisting to macroscopic spiral provides a potential inspiration for chiral self-organization of biological macromolecules.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.biomac.2c01033 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Deterministic control of nanomagnetic spiral trajectories using an electric field.
Nat Commun
June 2025
Laboratory for Neutron Scattering and Imaging (LNS), PSI Center for Neutron & Muon Science, Paul Scherrer Institut (PSI), Villigen, Switzerland.
The intertwined nature of magnetic and electric degrees of freedom in magnetoelectric (ME) materials is well described by ME-coupling theory. When an external electric field is applied to a ME material, the ME coupling induces unique and intriguing magnetic responses. Such responses underpin the utilisation of ME materials across diverse applications, ranging from electromagnetic sensing to low-energy digital memory technologies.
View Article and Find Full Text PDFModulating the Curvature of Protein Self-Assembled Spiral Nanotubules.
ACS Appl Mater Interfaces
May 2025
Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 9190401, Israel.
Structural transformations from ribbons to twisted ribbons to helical ribbons are often observed across supramolecular assemblies and macroscopic structures and can be described under a consistent theoretical framework. Conical molecular self-assembled structures, however, are rarely observed, may require more than one subunit, their dimensions are hard to control, and are poorly understood. Cytoskeleton microtubule (MT) is a dynamic protein-polymer that self-assembles from αβ-tubulin heterodimer, providing mechanical support to Eukaryotic cells.
View Article and Find Full Text PDFMechanically deformable organic ferroelectric crystal with plasticity optimized by fluorination.
Nat Commun
March 2025
Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, People's Republic of China.
The ability of plastic deformation exerts in bulk crystals would offer great promise for ferroelectrics to achieve emerging and exciting applications. However, conventional ferroelectric crystals generally suffer from inherent brittleness and are easy to fracture. Here, by implementing fluorination on anion, we successfully design a flexible organic ferroelectric phenylethylammonium trifluoromethanesulfonate (PEA-TFMS) with interesting plasticity in its bulk crystals.
View Article and Find Full Text PDFEnantio- and Diastereoselective Synthesis and Spiral-Stair-Like Single Helix Assembly of Figure-Eight Cyclophenylenes.
Angew Chem Int Ed Engl
May 2025
Department of Chemical Science and Engineering, Institute of Science Tokyo, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.
Helix assemblies of chiral molecules can transfer microscopic unimolecular chirality to macroscopic supramolecular chirality, enhancing various chiral properties. In addition to the commonly observed spiral-column-like helix assembly, a small number of spiral-stair-like helix assemblies have also been reported in aromatic nanocarbons with multiple chirality-related irregularities. However, they require separation of diastereomers and/or enantiomers or do not have stable chirality.
View Article and Find Full Text PDFAnatomic Study of Hip Pericapsular Muscle Arrangement on the Joint Capsule.
JB JS Open Access
March 2025
Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Background: Despite the recognized importance of pericapsular muscles in hip stability, their specific roles in stability remain debated. For anatomically elucidating how the pericapsular muscles can act on the femoral head and neck through the joint capsule, this study aimed to investigate pericapsular muscle arrangement on the joint capsule with a positional relation to the femoral head and neck and their histological relationships.
Methods: Eight hips of 7 anatomic donors (average age, 72.