Search research articles

关于 JoVE

概览领导团队博客 JoVE 帮助中心

作者

出版流程编辑委员会范围与政策同行评审常见问题投稿

图书馆员

用户评价订阅访问资源图书馆顾问委员会常见问题

研究

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments 存档

教育

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual 教师资源中心教师网站

使用条款与条件

相关概念视频

Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序

Same author

Dose-Dependent and Irreversible Photodarkening of InP/ZnSe/ZnS Quantum Dots.

ACS nano·2026

Same author

Photocurrent Saturation Mechanisms in Colloidal Quantum Dot Photodetectors.

Nano letters·2026

Same author

Mid-Infrared Stimulated Emission from Bulk Lead Sulfide Nanocrystals Formed by Aggregative Growth.

ACS nano·2026

Same author

Ultrafast Thermometry of Gold Nanoparticles: Resolving Particle and Medium Temperature Dynamics via Transient Absorption Spectroscopy.

ACS nano·2026

Same author

Halide-Exchange Arrest Enables Reabsorption-Free CsPbCl<sub>3</sub>/CsPbI<sub>3</sub> Perovskite Core/Shell Nanocrystals.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

Same author

Electrochemical Control over Electron Density of InAs Quantum Dots.

Journal of the American Chemical Society·2026

Search research articles

相关实验视频

Updated: Jul 6, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

在II-VI量子点中进行表面重建.

Jordi Llusar¹, Indy du Fossé², Zeger Hens³

¹BCMaterials, Basque Center for Materials, Applications, and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain.

|January 3, 2024

概括

使用密度函数理论 (DFT) 对较大的体量子点 (QD) 的模拟揭示了表面几何学决定了电子属性. 较大的QD模型显示带隙变化和局部能量水平,受表面重建的影响.

关键词:

密度函数理论密度函数理论量子点是一个量子点.半导体半导体半导体表面的重建表面的重建表面状态表示表面状态.

更多相关视频

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

相关实验视频

Last Updated: Jul 6, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

科学领域:

材料科学材料科学材料科学
量子化学是一个量子化学.
纳米技术纳米技术

背景情况:

密度函数理论 (DFT) 对于理解体量子点 (QDs) 是至关重要的.
当前的DFT模拟通常使用比实验模型小的QD模型,可能缺少大小依赖的效果.
需要更大的QD模型来准确地表示实验结构,并研究像核心形成这样的现象.

研究的目的:

通过使用 DFT 调查体量子点 (QD) 的电子特性,作为它们大小的函数.
了解QD模型尺寸的增加如何影响带隙,HOMO和LUMO本地化.
探索表面空隙和带被动化对QD电子结构的影响.

主要方法:

使用密度函数理论 (DFT) 的计算.
模拟的体量子点 (QD) 模型,直径增加到大约4.5纳米.
研究了表面空缺和随后用Z型配体重新填充的影响.

主要成果:

增加QD模型大小导致带间隙消失,HOMO/LUMO水平局部化在特定的方面.
在较大的QD模型中观察到表面轨道的横向合和表面带的形成.
通过空缺和Z型联结体进行表面重建,扩大了带间隙和分散的HOMO/LUMO水平.

结论:

体量子点的表面几何和面体结构显著影响其电子性质.
模型大小是QD的DFT研究中的关键因素,影响电子结构的预测.
通过空位管理和连接物选择,表面工程提供了一条调整 QD 电子特征的途径.