相关实验视频

Updated: Jun 29, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

在酸催化共价有机框架薄膜中控制方向和形态

Dayanni D Bhagwandin^1,2, Kirt A Page^1,2,3, Ly D Tran^1,2

¹Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA. Nicholas.Glavin.1@us.af.mil.

|April 4, 2024

概括

研究人员开发了一种新的接口生长方法,用于半导体共有机框架 (COF). 这种技术可以精确控制COF薄膜特性,这对于先进的电子应用至关重要.

科学领域:

材料科学材料科学材料科学
有机电子有机电子
纳米技术纳米技术

背景情况:

半导体共电有机框架 (COF) 正在获得动力,用于两极电子,有机电化学晶体管 (OECT) 和光探测器的应用.
精确控制COF薄膜特性对于优化它们在这些设备中的性能至关重要.

研究的目的:

研究一种用于合成 imine TAPB-PDA COF 薄膜的接口生长技术.
了解催化剂度如何影响COF薄膜形态和方向.
通过液体-固体接口方法培养的COF薄膜的电子特性进行评估.

主要方法:

使用接口生长技术在液体-液体和液体-固体接口上合成 imine TAPB-PDA COF 薄膜.
在水相中改变酸催化剂度,以研究其对膜形态的影响.
用显微镜和设备测量在Si/SiO2基板上生长的特征性COF薄膜.
制造的OECT设备用于评估合成的COF薄膜的电荷传输特性.

主要成果:

酸度显著影响COF薄膜形态:<1M防止核形成,1-4M产生光滑薄膜,4M以上会增加表面颗粒.
在液体-液体接口上生长的COF薄膜呈现混合的方向.
在Si/SiO2基板上的液体-固体接口上生长的COF薄膜显示了与基板平行的高度定向的层.
液体-固体生长过程产生了具有p型电荷传输的TAPB-PDA COF薄膜,在OECT中在0.9V的门电压下达到10μS的透导率.

结论:

接口生长技术为控制COF薄膜形态和方向提供了一条途径.
液体-固体界面增长对于生产适用于电子设备的高度定向的COF薄膜特别有效.
在OECT中展示的p型电荷传输突出了这些面向COF膜在电子应用中的潜力.

更多相关视频

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

相关概念视频

Acid Strength and Molecular Structure

Acid Strength and Molecular Structure

Binary Acids and Bases
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with...

Molecular Structure and Acidity

Molecular Structure and Acidity

An acid can be deprotonated to form a conjugate base or an anion. If the produced anion is more stable, then the acid is stronger. On the contrary, if the anion is unstable, then the acid is weaker. Hence, to determine the acidity of the compound, the stability of its conjugate base is studied using various factors.
The size effect explains the change in atomic size on acidity. When comparing the acids formed from elements that belong to the same column in the periodic table, their atomic sizes...

Cationic Chain-Growth Polymerization: Mechanism

Cationic Chain-Growth Polymerization: Mechanism

The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...