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2D Materials ◽  
2022 ◽  
Author(s):  
Bo Zhang ◽  
Lihui Zhang ◽  
Chengxiang Chen ◽  
Mengyue Gu ◽  
Yonghong Cheng ◽  
...  

Abstract Violet phosphorene, a recently determined semiconducting two-dimensional elemental structure, is a promising electronic and optoelectronic material. The nano-tribological properties of violet phosphorene nanoflakes are essential for their micro device applications. A friction anisotropy has been demonstrated for the violet phosphorene nanoflakes by lateral force microscope due to the sub-nanorod components of violet phosphorus. The friction forces of the violet phosphorene nanoflakes have been demonstrated to be valley along sub-nano rod direction and peak across the sub-nanorod direction with a period of 180°, resulting in a fast identification of the surface structure direction of violet phosphorene. The friction of violet phosphorene nanoflakes has also been shown to increase with increasing scanning pressure. However, it is not sensitive to scanning speed or layers. The friction of the violet phosphorene nanoflakes have also been demonstrated to increase when exposure to air for hours. The friction and adhesion features of violet phosphorene nanoflakes provide valuable foundation for violet phosphorene based devices.


Author(s):  
Ji-Huan He ◽  
Na Qie ◽  
Chun-Hui He ◽  
Khaled Gepreel

The pull-in voltage is crucial in designing an optimal nano/micro-electromechanical system (N/MEMS). It is vital to have a simple formulation to calculate the pull-in voltage with relatively high accuracy. Two simple and effective methods are suggested for this purpose; one is an ancient Chinese algorithm and the other is an extension of He’s frequency formulation.


Author(s):  
Danyang LI ◽  
Haoxiang Xu ◽  
Jiqin Zhu ◽  
Dapeng Cao

Atomically dispersed bi-atom catalysts (BACs) exhibit remarkable catalytic performance in a variety of reactions due to the adjacent coordination-unsaturated metal active sites, as well as interatomic synergistic effect. However, high-efficiently...


Author(s):  
Jean-Baptiste Vendeville ◽  
Mathew John Kyriakides ◽  
Yuiko Takebayashi ◽  
Sylvain Rama ◽  
James Preece ◽  
...  

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