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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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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...
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PRISM:三维亚衍射相位分辨成像光谱方法.

Artur Dobrowolski1, Jakub Jagiełło2, Beata Pyrzanowska2

  • 1Łukasiewicz Research Network - Institute of Microelectronics and Photonics, al. Lotników 32/46, Warsaw, 02-668, Poland. artur.dobrowolski@imif.lukasiewicz.gov.pl.

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|September 28, 2024
PubMed
概括

我们开发了一种名为Phases-Resolved Imaging Spectroscopic Method (PRISM) 的新方法,用于使用共聚焦拉曼光谱进行高分辨率3D材料成像. PRISM实现了微衍射分辨率,用于详细的材料相位分析.

关键词:
原子层沉积的原子层沉积.化学蒸气沉积化学蒸气沉积石墨烯是一种石墨烯.采用成像方法的成像方法.干扰增强 干扰增强 干扰增强离子蚀刻 离子蚀刻激光 激光器 激光器 激光器灯光 灯光 灯光 灯光光的吸收 光的吸收.光散射是指光的散射.材料的相位分辨率是材料的相位分辨率微柱子是一个微柱子.微观结构 微观结构微型沟是一个微型沟.纳米结构是一种纳米结构.视觉光学 视觉光学是指光学在等离子体中,我们可以得到等离子体.拉曼光谱法 拉曼光谱法扫描电子显微镜扫描电子显微镜信号减弱 信号减弱 信号减弱频谱学是一种光谱学.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 频谱学是一种光谱学.
  • 纳米技术纳米技术

背景情况:

  • 混焦拉曼光谱是一种强大的材料分析工具.
  • 现有的方法在实现亚衍射分辨率和详细的3D重建方面存在局限性.
  • 精确的材料相位成像对于先进的材料开发至关重要.

研究的目的:

  • 引入一种新的方法,PRISM,用于3D材料重建.
  • 为了实现低衍射和物质分辨率成像.
  • 用拉曼数据提高材料成像的质量.

主要方法:

  • 使用对焦拉曼数据在一个反向散射几何与532nm设置.
  • 实施阶段分辨率成像光谱方法 (PRISM).
  • 采用直接 (信号远程衰减比) 和间接 (光-物质相互作用) 模式用于空间信息,并分析Raman-active模式用于相位信息.

主要成果:

  • 展示了各种标本的3D重建 (无形Al2O3,SiC,石墨烯,AlGaN微柱).
  • 实现了亚衍射横向分辨率 (100nm) 和纳米尺度的垂直精度.
  • 展示了该方法对各种材料系统的适用性.

结论:

  • 在材料成像质量方面,PRISM提供了显著的进步.
  • 该方法与标准拉曼光谱学设置兼容.
  • 在纳米尺度上,PRISM提供了对材料组成和结构的详细见解.