水平反应器中碳纳米管生长过程中气体流场分布的实验与模拟

IF 2.9 3区物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-08-13 DOI:10.1016/j.physe.2024.116074

Qianpeng Dong , Chenyu Gao , Wenjuan Bai , Lianlian Wang , Dianming Chu , Yan He

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引用次数: 0

摘要

通过化学气相沉积法在水平反应器中生长碳纳米管（CNTs），实验发现不同的加热温度和瓷舟位置会影响CNTs的形态和产量。利用计算流体动力学（CFD）软件模拟了不同操作参数下水平反应器中的气体流场分布，结果发现水平反应器中的气体流动呈涡流推进，这种气体循环是由于气流之间存在温差导致密度不同而引起的。随着加热温度和氮气速度的增加，这种漩涡会扭曲层流，进而削弱 CNT 的生长。

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Experimentation and simulation of gas flow field distribution during the growth of carbon nanotubes in a horizontal reactor

Carbon nanotubes (CNTs) were grown in a horizontal reactor by chemical vapor deposition, and it was found in the experiments that different heating temperatures and the position of the porcelain boat affect the morphology and yield of CNTs. Computational fluid dynamics (CFD) software is used to simulate the gas flow field distribution in the horizontal reactor under different operating parameters, and the results revealed that the gas flow in the horizontal reactor was advancing with vortex, and this gas circulation is induced by the difference in density due to the existence of temperature difference between the gas streams. As the heating temperature and nitrogen gas velocity increase, this vortex distorts the laminar flow, which in turn weakens the growth of CNTs.

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来源期刊

Physica E-low-dimensional Systems & Nanostructures 物理-纳米科技

CiteScore

7.30

自引率

6.10%

发文量

356

审稿时长

65 days

期刊介绍： Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures