在AU上通过合式2T3N自组装单层的旋转依赖电荷传输
Andrea Stefani1, Massimo Innocenti2,3, Walter Giurlani2,3
1Department of Physics (FIM), University of Modena, Via Campi 213/A, 41125 Modena, Italy.
The Journal of chemical physics
|September 8, 2023
概括
黄金表面的 chiral oligothiophene 功能化增强了电子自旋选择性. 这种奇拉诱导的旋转选择性效应显著影响了接口上的电荷传输速率.
科学领域:
- 表面科学是一门科学.
- 有机电子学有机电子学
- 奇拉性和旋转物理学的物理.
背景情况:
- 用奇拉分子使黄金表面功能化对于开发先进的电子设备至关重要.
- 了解接口上的电荷传输机制是优化设备性能的关键.
研究的目的:
- 为了使黄金表面具有奇拉性奥利戈提奥芬衍生物的功能,N,N-bis-[2,2 ';5 ',2 ′′]tert-thiophene-5-yl methylcyclohexane-1,2-diamine (2T3N).
- 为了研究这种奇拉界面对电荷转移动力学和旋转选择性的影响.
主要方法:
- 在黄金表面上2T3N的化学吸收.
- 使用X射线光电子循环二元化,X射线光发射谱学和电解的表征.
- 循环电压测量用于研究Fe (III) /Fe (II) 氧化还原对.
- 磁导原子力显微镜. 磁导原子力显微镜.
主要成果:
- 成功创建和特征化了Auidiye2T3N接口.
- 电荷转移速率常数 (k°) 从纯金的1 × 10-1 cm s-1下降到Auidiye2T3N接口的3.3 × 10-2 cm s-1.
- 证据表明,观察到基拉诱导的旋转选择性 (CISS) 效应,旋转极化约为30%.
结论:
- 嵌合体Augadgadgad2T3N接口表现出显著的嵌合体诱导的旋转选择性.
- 这种CISS效应会影响接口上的电荷转移动力学,为旋转电子应用提供了潜在的可能性.
相关概念视频
03:20Nuclear Transmutation
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed protons being...
01:37Energy to Drive Translocation
Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
Generally, polypeptides are unfolded by two distinct...
01:21Generation of Three-Phase Voltage
A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
As the rotor...
01:30The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
01:19Three-Winding Transformers
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
01:26Per-Unit Sequence Models
An ideal Y-Y transformer, grounded through neutral impedances, displays per-unit sequence networks akin to those of a single-phase ideal transformer when subjected to balanced positive- or negative-sequence currents. These currents do not produce neutral currents, and their associated voltage drops.
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...