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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
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使用固态自旋传感器的高分辨率磁共振光谱

David R Glenn1, Dominik B Bucher1,2, Junghyun Lee3

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts, USA.

Nature
|March 16, 2018
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新技术, 采用钻石中的空中心来实现小样本的高分辨率核磁共振 (NMR). 这一突破使得单细胞层面的详细分子分析成为可能.

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科学领域:

  • 量子感应
  • 光谱学
  • 纳米技术

背景情况:

  • 固态电子旋转,就像钻石中的空中心一样,可以从纳米尺度样本中敏感地检测核磁共振 (NMR) 信号.
  • 现有的空中心核磁共振方法达到~100 Hz的分辨率,不足以解决关键的分子结构标识符,如标尺合和小化学转移.
  • 传统的NMR提供了高分辨率,但对微或纳米样本缺乏灵敏度.

研究的目的:

  • 使用固态自旋传感器在NMR中实现高光谱分辨率的新测量技术.
  • 在极小的样本体积上进行分析性NMR光谱,直到单细胞尺度.
  • 克服目前纳米辐射灵敏度和分辨率的局限性.

主要方法:

  • 使用钻石中的空中心组合作为固态自旋传感器 (磁力计).
  • 实现了窄带同步读取协议以增强信号检测.
  • 将该技术应用于微米尺度的样本体积 (~10 picolitres) 和热极化核旋转.

主要成果:

  • 获得了大约1赫兹的NMR光谱分辨率,与以前的方法相比显著改善.
  • 在~10 picolitre的样本体积中成功观察到NMR标量合.
  • 使用增强的空中心技术从小分子中解决化学转移光谱.

结论:

  • 开发的技术可以在单细胞水平上进行分析性NMR光谱.
  • 这种进步弥合了高分辨率NMR和纳米级敏感性之间的差距,为化学,结构生物学和材料研究开辟了新的途径.
  • 该方法为皮科升体积化学分析和相关的光学和NMR显微镜铺平了道路.