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相关概念视频

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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一个简单的空腔增强激光式加热器用于反射样品.

Kai Golibrzuch1,2,3, Alec M Wodtke1,2,3

  • 1Institute for Physical Chemistry, University of Göttingen, 37077 Göttingen, Germany.

The Review of scientific instruments
|January 30, 2025
PubMed
概括

这项研究介绍了一种简单,廉价的二极管激光加热系统,用于表面科学. 它有效地将样品加热到高温,并具有精确的控制,克服了传统方法的局限性.

科学领域:

  • 表面科学是一门科学.
  • 真空技术是真空技术的一种.
  • 材料科学 是一种材料科学.

背景情况:

  • 表面科学仪器需要高真空和精确的温度控制,用于诸如分子束表达和催化等实验.
  • 传统的热和电子轰炸加热方法在真空室中会导致排气并干扰实验.
  • 光学加热提供了直接的样品能量传递,但对于反射金属样品来说,通常被认为是复杂和低效的.

研究的目的:

  • 为表面科学应用开发一种简单,廉价和高效的光学加热系统.
  • 在真空环境中克服传统加热方法的局限性.
  • 为了提高金属样品的激光加热效率.

主要方法:

  • 一个采样加热器使用商业二极管激光器和形镜来创建一个稳定的光学腔.
  • 通过光纤将26W的激光功率引导到直径为1厘米的PT样本.
  • 实现可编程温度控制和稳定性监控.

主要成果:

  • 一个直径为1厘米的Pt样品在1分钟内被加热到1400K,仅使用26W的激光功率.
  • 证明了出色的可编程温度控制和长期稳定性.
  • 样本被加热到900°C,但室内压力增加微不足道.

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Custom-designed Laser-based Heating Apparatus for Triggered Release of Cisplatin from Thermosensitive Liposomes with Magnetic Resonance Image Guidance
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A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
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Custom-designed Laser-based Heating Apparatus for Triggered Release of Cisplatin from Thermosensitive Liposomes with Magnetic Resonance Image Guidance

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结论:

  • 开发的二极管激光加热系统是表面科学传统方法的简单,具有成本效益的替代方案.
  • 光学腔设计提高了加热效率,即使对于反射金属样品.
  • 这种方法提供了精确的温度控制和最小的真空干扰,适合高级表面分析.