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相关概念视频

Light as Energy01:35

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
The Antenna Complex01:15

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Energy Transfer in Chemical Reactions01:16

Energy Transfer in Chemical Reactions

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. Potential...
Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...

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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
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全素的合颗粒使结构色彩和光热转换成为可能.

Hai Liu1, Yanhua Guan1, Ruonan Wang1

  • 1State Key Laboratory of Biobased Fiber Materials, College of Light Industry and Engineering, Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, China.

Small (Weinheim an der Bergstrasse, Germany)
|November 29, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了全有机合性素颗粒 (CLPs) 用于结构色彩和光热转换. 定制CLP尺寸优化近红外光学特性和光热效率,提供可持续的功能材料.

关键词:
合体无形数组的合体无形数组.红色的线性蛋白质 (lignin) 是一种颗粒颗粒的粒子是什么光热转换的光热转换结构色彩 结构色彩

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 生物材料是一种生物材料.

背景情况:

  • 模仿自然光学控制正在扩展到功能应用,如光热转换.
  • 现有的光子结构主要使用金属和无机材料,缺乏有机成分.

研究的目的:

  • 报告一种制造全有机合性木质素颗粒 (CLPs) 的方法.
  • 为了使用这些新型有机粒子实现结构色彩和光热转换.

主要方法:

  • 通过分子间和分子内相互作用促进的红素聚合形成稳定的CLP.
  • 量身定制CLP粒子大小,以实现不同的光学行为和光热效率.
  • 多尺度模拟用于分析结构色彩,分子相互作用和中尺度光子效应.

主要成果:

  • 较小的CLP表现出蓝移结构颜色,增强的π-π堆叠和分子结合.
  • 中等尺度分析显示了增强的Mie散射和局部电磁场封闭.
  • π结合和光子场效应的协同合导致了高效的光热转换.

结论:

  • 这项工作介绍了全有机CLP用于可调节的结构色彩和光热转换.
  • 提供了对有机光子材料光热转换的机械洞察.
  • 告知可持续的,功能性的合体无形数组的合理设计.