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在 Bilayer Moiré 材料中使用 Gomb-Net 进行原子识别
Austin C Houston1, Sumner B Harris2, Hao Wang3
1Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, United States.
Nano letters
|June 2, 2025
概括
一个新的深度学习模型,Gomb-Net,现在可以识别双层材料的单个层中的原子,克服moiré模式干扰. 这一突破使得以前不可能的详细原子分析成为可能,揭示了对物质物理学的洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 深度学习应用程序
背景情况:
- 范德瓦尔斯 (vdW) 双层材料中的莫伊尔图案使原子分辨率成像复杂化.
- 标准的成像技术在moiré边缘存在时难以提供原子规模的洞察力.
研究的目的:
- 开发一种用于检测扭曲双层异构结构单个层中的原子位置和身份的方法.
- 克服莫伊尔模式对原子尺度分析所造成的局限性.
主要方法:
- 开发了一个名为Gomb-Net.Net的深度学习模型.
- 使用Gomb-Net识别原子坐标和物种,有效地解开moiré模式.
- 应用该方法来分析原子替代位点分布在扭曲的分数Janus WS2-WS2 ((1-x) Se2x异构结构中.
主要成果:
- Gomb-Net成功地识别了每个层中的原子位置和物种,从而实现了特定层的映射.
- 该模型解卷复杂的莫雷模式,优于常见的细分模型.
- 发现Se原子的特定层植入点不受局部moiré调制的影响.
结论:
- 这一进步使得先前无法获得的复杂物质系统中的原子识别成为可能.
- 这些发现为在原子尺度上探索物质物理学开辟了新的途径.
- Gomb-Net为VDW异构结构提供了前所未有的层级特定洞察力.
相关概念视频
UV–Vis Spectroscopy of Conjugated Systems
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...
One of the factors influencing λmax is the extent of conjugation in the...
UV–Vis Spectroscopy: Molecular Electronic Transitions
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...
UV–Vis Spectroscopy: Woodward–Fieser Rules
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the contributions...
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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

