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Shen Jun, Chongqing Research Institute, Chinese Academy of Sciences / Guo Wei, BIT "ACS Appl. Nano Mater.": Chemical vapor deposition...

 Last Update: 2021-08-28
 Source: Internet
 Author: User

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Dendritic morphology, as the defining feature of a large number of natural things such as pine trees, snowflakes, and neuronal cells, is widespread in nature
.

So far, whether it is for natural or synthetic materials, the formation mechanism of dendritic structure based on a certain non-equilibrium growth process is still unclear

In terms of application, compared with the single-layer, few-layer and multi-layer structures of the same material, the dendritic structure has the advantages of larger specific surface area and more surface active units.

It is often used as a catalyst (applied to HER , OER, etc.

Recently, Associate Researcher Shen Jun from Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences and Professor Guo Wei from Beijing Institute of Technology published a titled " Isomeric Compound Dendrites on a Monolayer WS ₂ Substrate: Morphological Engineering and Formation Mechanism " on " ACS Applied Nano Materials ".

Article ( DOI: 10.

Highlights of this article

(1) Controllable synthesis with a six-axis symmetrical dendritic structure, with a fractal dimension D of 1.

90 (in line with the diffusion restriction mechanism DLA)

(2) First-principles simulation of precursor monomer types, adsorption energy and adsorption sites in the process of dendrite growth

(3) First-principles simulation of the diffusion path and formation process of the precursor monomer in the process of dendrite growth

This work will help to further understand the details of the non-equilibrium growth kinetics of two-dimensional crystals, and provide new insights for the growth of allotrope dendrite structures on two-dimensional crystal substrates through morphological engineering
.

At the same time, the unique dendritic structure will also contribute to a wide range of applications in sensors ( gas or humidity ) and phototransistors

The first author of the thesis is associate researcher Shen Jun of the Chongqing Research Institute of the Chinese Academy of Sciences, and the corresponding authors of the thesis are Dr.

Zhan Li of the Chongqing Research Institute of the Chinese Academy of Sciences and Professor Guo Wei of Beijing Institute of Technology