相关实验视频
Updated: Jan 21, 2026

07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
11.1K
通过metaheuristic优化和基于物理的神经网络来解决Eu2+激活多位点体中的能量转移动态
Byung Do Lee1, Young Hoon Seo1, Min Young Cho1
1Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, South Korea.
Nature communications
|January 19, 2026
概括
由人工智能和高性能计算驱动的物理接地模型现在提供了对发光衰变的准确分析. 这些方法揭示了供体-接受体转移作为体中主要的放松途径.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
- 固态物理 固态物理
背景情况:
- 传统的多指数适配光发衰变缺乏物理基础,只提供经验上的便利性.
- 严格的非线性速率方程模型以前受到计算成本的限制.
- 人工智能和计算技术的进步现在使复杂的放松动态的可处理,基于物理的分析成为可能.
研究的目的:
- 为了研究在原型的Eu2+激活中呈现波长灭的捐赠者-受体相互作用.
- 应用先进的计算方法进行量化分析的发光衰变动态.
- 为了比较元启发驱动的模拟和物理信息的神经网络来提取速率常数.
主要方法:
- 使用元启发驱动的Runge-Kutta模拟来模拟发光衰变.
- 采用物理信息的神经网络 (PINNs) 作为一个补充的分析框架.
- 在La2.544Ca1.456Si12O4.456N16.544:Eu2+中分析了供体接受体相互作用.
主要成果:
- 通过模拟和PINN方法成功提取了定量辐射和非辐射速率常数.
- 这两种方法都趋于一致的速率常数,验证了模型.
- 确立了捐赠者-接受者能量传输作为主要的放松途径.
结论:
- 先进的计算技术为光衰变提供了物理上有意义的见解.
- 捐赠者-接受者转移显著影响放松动态,超过辐射和同物种相互作用.
- 这种方法提供了一种量化,基于物理的理解,可以超越.
相关概念视频
Activation Energy
86.4K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
86.4K
Energy Transfer in Chemical Reactions
10.7K
Chemical reactions require sufficient energy to cause the matter to collide with enough precision and force that old chemical bonds can be broken and new ones formed. In general, kinetic energy is the form of energy powering any type of matter in motion. Imagine a person building a brick wall. The energy it takes to lift and place one brick on top of another is the kinetic energy—the energy matter possesses because of its motion. Once the wall is in place, it stores potential energy.
10.7K
Bond Dissociation Energy and Activation Energy
10.7K
Bond energy is the energy required to break a bond homolytically. These values are usually expressed in units of kcal/mol or kJ/mol and are referred to as bond dissociation energies when given for specific bonds or average bond energies when indicated for a given type of bond over many compounds. Firstly, the bond dissociation energy for a single bond is weaker than that of a double bond, which in turn is weaker than that of a triple bond. Secondly, hydrogen forms relatively strong bonds with...
10.7K
Enzymes and Activation Energy
22.8K
The activation energy (or free energy of activation), abbreviated as Ea, is the small amount of energy input necessary for all chemical reactions to occur. During chemical reactions, certain chemical bonds break, and new ones form. For example, when a glucose molecule breaks down, bonds between the molecule's carbon atoms break. Since these are energy-storing bonds, they release energy when broken. However, the molecule must be somewhat contorted to get into a state that allows the bonds to...
22.8K
Optimal Foraging
13.7K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
13.7K
What is Energy?
58.4K
The universe is composed of matter in different forms, and all forms of matter contain energy. The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal (fossilized...
58.4K

