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相关概念视频

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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Leveling Effect and Non-Aqueous Acid-Base Solutions02:11

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This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
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Chemical Reactions in Aqueous Solutions03:03

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Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
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An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
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An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
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Characterizing Individual Protein Aggregates by Infrared Nanospectroscopy and Atomic Force Microscopy
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基于原子力显微镜的光热红外显微镜用于水环境,使用基于石墨烯的微流体细胞.

Yasuhiko Fujita1, Mariko Takahashi1, Hirohmi Watanabe1

  • 1Research Institute for Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) Kagamiyama 3-11-32 Higashihiroshima 739-0046 Japan Yasuhiko.fujita@aist.go.jp.

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概括

我们展示了基于原子力显微镜的光热诱导共振 (PTIR) 对水中的化聚合物. 该技术通过分析PTIR光谱的变化来检测聚合物胀,为聚合物行为提供了新的见解.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 频谱学是一种光谱学.

背景情况:

  • 在水性环境中研究水合聚合物对传统的表征技术提出了挑战.
  • 原子力显微镜 (AFM) 提供高分辨率的表面成像,但将其与液体中的光谱方法集成是复杂的.

研究的目的:

  • 开发和演示一种新的方法来分析水合聚合物在水中使用基于AFM的光热诱导共振 (PTIR).
  • 研究PTIR在水性条件下检测聚合物结构变化 (如胀) 的潜力.

主要方法:

  • 使用微流体细胞与原子薄的石墨烯层作为一个红外透明窗口.
  • 在微流体细胞内对水合聚合物进行光热诱导共振 (PTIR) 测量.
  • 分析了光谱变化以确定聚合物胀.

主要成果:

  • 成功证明了在水环境中对水合聚合物的PTIR测量.
  • 观察到PTIR频谱的明显变化与聚合物膨胀相关.
  • 验证了石墨烯作为微流体PTIR有效的红外透明窗口的使用.

结论:

  • 基于AFM的PTIR是一种可行的技术,用于在水溶液中表征化聚合物.
  • 通过分析光谱变化,PTIR可以有效地检测聚合物胀.
  • 这种方法为研究生物相关条件下的聚合物动态和相互作用开辟了新的途径.