Ferroelectricity occurs in crystals with broken spatial inversion symmetry. In conventional perovskite oxides, concerted ionic displacements within a 3D network of transition-metal-oxygen polyhedra (MO ) manifest spontaneous polarization. Meanwhile, some 2D networks of MO foster geometric ferroelectricity with magnetism, owing to the distortion of the polyhedra. Because of the fundamentally different mechanism of ferroelectricity in a 2D network, one can further challenge an uncharted mechanism of ferroelectricity in a 1D channel of MO and estimate its feasibility. Here, ferroelectricity and coupled ferromagnetism in a 1D FeO tetrahedral chain network of a brownmillerite SrFeO epitaxial thin film are presented. The result provides a new paradigm for designing low-dimensional MO networks, which is expected to benefit the realization of macroscopic ferro-ordering materials including ferroelectric ferromagnets.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/adma.201808104 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Activation and Reactivity of the Deubiquitinylase OTU Cezanne-2 from MD Simulations and QM/MM Calculations.
J Chem Inf Model
January 2025
Molecular Simulations and Design Group, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106 Magdeburg, Germany.
Cezanne-2 (Cez2) is a deubiquitinylating (DUB) enzyme involved in the regulation of ubiquitin-driven cellular signaling and selectively targets Lys11-linked polyubiquitin chains. As a representative member of the ovarian tumor (OTU) subfamily DUBs, it performs cysteine proteolytic isopeptide bond cleavage; however, its exact catalytic mechanism is not yet resolved. In this work, we used different computational approaches to get molecular insights into the Cezanne-2 catalytic mechanism.
View Article and Find Full Text PDFSupramolecular DNA Nanodevice Assembled via RCA and HCR Cascade Reaction on Tetrahedral DNA Nanostructure for Sensitive Detection and Intracellular Imaging of Dual-miRNAs Associated with Liver Cancer.
Anal Chem
January 2025
Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
Herein, a supramolecular DNA nanodevice was formed via the rolling circle amplification (RCA) and hybridization chain reaction (HCR) cascade reaction on a tetrahedral DNA nanostructure (TDN) to achieve simultaneous sensitive detection and intracellular imaging of dual-miRNAs related to liver cancer. The supramolecular DNA nanodevice effectively addressed the limitations of low probe loading capacity in traditional TDN nanodevices by enriching plenty of signal probes around a single TDN, significantly enhancing the fluorescence signal. Impressively, the supramolecular DNA nanodevice with a TDN fulcrum and dense DNA structure imparted the nanodevice with strong rigidity, ensuring the stability of the signal probes to decrease aggregation quenching for further increasing the fluorescence response.
View Article and Find Full Text PDFCrystal structure of (μ-7-{[bis-(pyridin-2-ylmeth-yl)amino-1κ ,','']meth-yl}-5-chloro-quinolin-8-olato-2κ;1:2κ )tri-chlorido-1κ,2κ -dizinc(II).
Acta Crystallogr E Crystallogr Commun
October 2024
Osaka Research Institute of Industrial Science and Technology, 1-6-50 Morinomiya, Joto-ku, Osaka 536-8553, Japan.
The title compound, [Zn(CHClNO)Cl], is a dinuclear zinc(II) complex with three chlorido ligands and one penta-dentate ligand containing quinolin-8-olato and bis-(pyridin-2-ylmeth-yl)amine groups. One of the two Zn atom adopts a tetra-hedral geometry and coordinates two chlorido ligands with chelate coord-ination of the N and O atoms of the quinolin-8-olato group in the ligand. The other Zn atom adopts a distorted trigonal-bipyramidal geometry, and coordinates one chlorido-O atom of the quinolin-8-olato group and three N atoms of the bis-(pyridin-2-ylmeth-yl)amine unit.
View Article and Find Full Text PDFFour-component protein nanocages designed by programmed symmetry breaking.
Nature
December 2024
Department of Biochemistry, University of Washington, Seattle, WA, USA.
Four, eight or twenty C3 symmetric protein trimers can be arranged with tetrahedral, octahedral or icosahedral point group symmetry to generate closed cage-like structures. Viruses access more complex higher triangulation number icosahedral architectures by breaking perfect point group symmetry, but nature appears not to have explored similar symmetry breaking for tetrahedral or octahedral symmetries. Here we describe a general design strategy for building higher triangulation number architectures starting from regular polyhedra through pseudosymmetrization of trimeric building blocks.
View Article and Find Full Text PDFA sulfur-templated Ni-Ni' coordination polymer that relies on a polarizable nickel nitrosyl hub.
Dalton Trans
December 2024
Department of Chemistry, Texas A & M University, College Station, Texas 77843, USA.
The templating properties of a diaza-nickel--dithiolate towards triphenylphosphine gold(I), yielding a [Ni(NS)·2Au(PPh)] complex (T. A. Pinder, S.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!