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相关概念视频

Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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Thermodynamic Potentials01:26

Thermodynamic Potentials

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Thermodynamic potentials are state functions that are extremely useful in analyzing a thermodynamic system. They have dimensions of energy. The four important thermodynamic potentials are internal energy, enthalpy, Helmholtz free energy, and Gibbs free energy. These thermodynamic potentials can be expressed using two of the following variables: pressure, volume, temperature, and entropy. These two variables are expressed as the rate of change of the thermodynamic potential with respect to other...
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Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

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sp3d and sp3d 2 Hybridization
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Equilibrium Conditions for a Particle01:23

Equilibrium Conditions for a Particle

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When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
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Fermi Level Dynamics01:12

Fermi Level Dynamics

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The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
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Molecular Orbital Theory II03:51

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Molecular Orbital Energy Diagrams
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相关实验视频

Updated: Jun 29, 2025

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
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DL_POLY Quantum 2.0:用于高级路径积分模拟的模块化通用软件.

Nathan London1, Dil K Limbu1,2, Mohammad R Momeni1

  • 1Division of Energy, Matter and Systems, School of Science and Engineering, University of Missouri-Kansas City, Kansas City, Missouri 64110, USA.

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概括
此摘要是机器生成的。

DL_POLY Quantum 2.0通过使用路径积分方法结合核量子效应来增强分子动力学模拟. 这种先进的软件可以进行大规模的长时间模拟,并计算诸如光谱和扩散系数之类的关键性质.

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科学领域:

  • 计算化学计算化学
  • 量子力学就是量子力学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 分子动力学 (MD) 模拟对于理解材料特性至关重要.
  • 在MD中整合量子力学效应在计算上具有挑战性.
  • 现有的软件往往缺乏用于量子效应的全面工具.

研究的目的:

  • 为了介绍DL_POLY Quantum 2.0,一个用于MD模拟的先进软件.
  • 为了使核量子效应 (NQE) 可以纳入大规模模拟中.
  • 为量子增强模拟提供灵活和用户友好的平台.

主要方法:

  • 使用费曼的途径积分形式主义用于量子力学.
  • 采用模块化结构,以便轻松集成NQE.
  • 具有高度并行的计算套件以提高效率.
  • 实施先进的动态方法和整合方案.

主要成果:

  • DL_POLY Quantum 2.0成功地将NQEs纳入了MD模拟中.
  • 该软件允许进行大规模和长时间的模拟.
  • 包括用于计算相关函数,二极点和速度的模块.
  • 提供用于红外吸收光谱和扩散系数计算的工具.

结论:

  • DL_POLY Quantum 2.0 是一个强大的工具,用于量子增强分子动力学.
  • 它显著提升了模拟复杂系统与量子效应的能力.
  • 该软件为计算化学和材料科学研究人员提供了全面的解决方案.