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Accelerating Fluids01:17

Accelerating Fluids

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When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
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X-ray Diffraction of Biological Samples01:10

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X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
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Updated: Jul 1, 2025

Polymer Microarrays for High Throughput Discovery of Biomaterials
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加快二维材料的发现

Anupma Thakur1, Babak Anasori1,2

  • 1School of Materials Engineering, Purdue University, West Lafayette, IN, USA.

Science (New York, N.Y.)
|March 14, 2024
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此摘要是机器生成的。

这项研究引入了一种大规模的理论驱动的方法来预测新的二维 (2D) 材料. 这种方法显著扩大了已知的二维材料领域,用于未来的研究和应用.

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科学领域:

  • 材料科学
  • 凝聚物质物理学
  • 计算化学

背景情况:

  • 新的二维 (2D) 材料的发现对于电子和储能等领域的发展至关重要.
  • 预测具有理想性质的新型二维材料仍然是一个重大挑战.

研究的目的:

  • 开发和应用一个大规模的,理论驱动的计算方法来预测新的二维材料.
  • 系统地探索现有的材料发现理论框架的潜力.

主要方法:

  • 基于已知物理理论的高通量计算选方法.
  • 使用密度功能理论 (DFT) 计算来评估候选材料的稳定性和电子性质.
  • 开发了确定热力学稳定和动态可行的二维材料的标准.

主要成果:

  • 已经成功地预测了大量以前未被发现的二维材料.
  • 确定了一些具有独特电子和结构特性的有前途的候选产品.
  • 理论框架在指导寻找新材料方面是有效的.

结论:

  • 一种可扩展的,以理论为导向的方法可以有效地加速发现新的二维材料.
  • 这些预测材料对实验家和理论家来说是一个宝贵的资源.
  • 这项工作为下一代二维材料的合理设计铺平了道路.