Video Experimental Relacionado
Updated: May 1, 2026
11:07
Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
9.6K
Una perovskita molecular con enlaces de coordinación conmutables para ferroeléctricos multiaxiales de alta
Wei-Jian Xu1, Peng-Fei Li2, Yuan-Yuan Tang2
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, China.
Journal of the American Chemical Society
|April 13, 2017
Resumen
Los investigadores diseñaron una nueva perovskita molecular, TMC-1, que exhibe ferroelectricidad multiaxial a través de la conmutación de enlaces. Este descubrimiento ofrece una nueva vía para materiales ferroeléctricos avanzados y electrónica flexible.
Área de la Ciencia:
- Ciencias de los materiales
- Química del estado sólido
- La cristalografía
Sus antecedentes:
- Los mecanismos ferroeléctricos en cristales moleculares generalmente implican transiciones de orden-desorden o desplazamiento, sin ruptura de enlaces químicos.
- Los materiales ferroeléctricos existentes a menudo tienen limitaciones en su número de direcciones ferroeléctricas o complejidad de fabricación.
Objetivo del estudio:
- Para demostrar un mecanismo ferroeléctrico de conmutación de enlaces diseñable en cristales moleculares.
- Introducir una nueva perovskita molecular, TMC-1, con propiedades ferroeléctricas multiaxiales.
- Explorar el potencial de TMC-1 para la electrónica flexible de próxima generación.
Principales métodos:
- Síntesis y caracterización de la perovskita molecular [CH3) 3NOH] 2 [KFe (CN) 6] (TMC-1).
- Fabricación de películas delgadas TMC-1 de alta calidad mediante un proceso de solución.
- Investigación de las propiedades ferroeléctricas a escala macroscópica y microscópica.
Principales resultados:
- TMC-1 exhibe una transición de conmutación de enlaces bajo presión ambiental, un nuevo mecanismo ferroeléctrico.
- TMC-1 muestra ferroelectricidad multiaxial con 24 direcciones ferroeléctricas equivalentes y una alta temperatura de Curie de 402 K.
- Las películas delgadas TMC-1 de alta calidad muestran excelentes propiedades ferroeléctricas, adecuadas para aplicaciones en dispositivos.
Conclusiones:
- El mecanismo de conmutación de enlaces en TMC-1 abre nuevas vías para el diseño de materiales ferroeléctricos avanzados.
- TMC-1 es un candidato prometedor para la electrónica flexible de próxima generación debido a sus propiedades únicas y fácil fabricación.
- La estrategia de ensamblaje molecular proporciona un nuevo enfoque para adaptar las funcionalidades ferroeléctricas.
Más Videos Relacionados
Videos de Conceptos Relacionados
02:32Bonding in Metals
45.5K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
45.5K
02:51Metal-Ligand Bonds
19.3K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
19.3K
02:42Valence Bond Theory
8.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.9K
03:02Colors and Magnetism
12.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.1K
01:28Types Of Superconductors
1.7K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.7K
01:31Ferromagnetism
2.8K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.8K