相关实验视频

Updated: Jun 23, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

在石墨烯上对同质的GaN NW阵列进行两步生长过程

Dyhia Tamsaout¹, Edmond Cambril¹, Laurent Travers¹

¹Centre de Nanoscience et Nanotechnologie (C2N), Université Paris-Saclay, CNRS, 91120 Palaiseau, France.

|February 7, 2025

概括

一个两步的等离子体辅助的分子束表过程显著减少了化 (GaN) 纳米线在石墨烯上生长的潜伏时间. 这种优化的方法还改善了GaN纳米线的高度均性.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
半导体物理半导体物理

背景情况:

化 (GaN) 纳米线 (NW) 对电子和光电子设备至关重要.
在石墨烯基基板上GaN NWs的生长带来了挑战,包括长的潜伏时间和不良的选择性.
等离子体辅助分子束表达 (MBE) 是NW合成的常见技术.

研究的目的:

为了研究在石墨烯上GaN NWs的两步生长过程.
为了减少在石墨烯上GaN核化之前的化时间.
为了提高GaN NW在石墨烯上对SiO2表面增长的选择性.

主要方法:

使用了等离子体辅助的分子束表 (MBE).
测试了两步温度过程:初始低温阶段,然后是高温阶段.
用电子束光刻绘制图案的石墨烯层被用于选择性生长.

主要成果:

两步生长过程显著减少了GaN核化的化时间.
观察到GaN纳米线的高度均性得到改善.
与周围的SiO2表面相比,在石墨烯上增长的选择性得到了提高.

结论:

优化的两步增长过程对对石墨烯控制的GaN纳米线合成有效.
这种方法为在石墨烯平台上制造基于GaN的纳米设备提供了可行的途径.
进一步的研究可以探索温度和持续时间的变化,以获得最佳的NW属性.

关键词:

在 GaN GaN 中.电子光束石版印刷的电子光束石版.化时间化时间分子光束的表达式是epitaxy.纳米电线纳米线.选择性的增长区域增长.

更多相关视频

Analysis of Contact Interfaces for Single GaN Nanowire Devices

Analysis of Contact Interfaces for Single GaN Nanowire Devices

Published on: November 15, 2013

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy

Published on: October 23, 2018

相关概念视频

Step-Growth Polymerization: Overview

Step-Growth Polymerization: Overview

Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...

Molecular Weight of Step-Growth Polymers

Molecular Weight of Step-Growth Polymers

Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...