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相关概念视频

P-N junction01:11

P-N junction

684
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Tonicity in Plants01:20

Tonicity in Plants

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Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
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Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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The Hall Effect01:30

The Hall Effect

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Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Standard Electrode Potentials03:02

Standard Electrode Potentials

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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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相关实验视频

Updated: Sep 13, 2025

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在天然叶子中的高离子Seebeck效应.

Hungu Kang1, Hongwoo Lee2, Cheljong Hong2

  • 1Department of Chemistry, Korea University, Seoul, 02841, South Korea.

Advanced materials (Deerfield Beach, Fla.)
|July 27, 2025
PubMed
概括

植物可以利用离子Seebeck效应从热量中产生电力. 树叶产生显著的热电压,提供一个可生物降解的平台,用于可持续的能源转换.

关键词:
离子 Seebeck 在线观看离子 离子 是一种离子.叶子 叶子 叶子热电压是一个热电压.

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A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
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A Rapid Laser Probing Method Facilitates the Non-invasive and Contact-free Determination of Leaf Thermal Properties
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科学领域:

  • 植物生理学 植物生理学
  • 材料科学 材料科学 材料科学
  • 收集能源 收集能源

背景情况:

  • 植物积极运输用于生命过程的离子.
  • 植物中热电的离子Seebeck效应尚未被探索.
  • 了解植物生物热电特性对于新能源应用至关重要.

研究的目的:

  • 为了研究植物组织的热电特性.
  • 探索热能转化为电能的工厂的潜力.
  • 分析植物中观察到的热电效应背后的机制.

主要方法:

  • 使用了天然的Ficus elastica叶子.
  • 在温和的温度梯度下测量了离子热电压.
  • 研究了叶子干燥和电极选择的作用.
  • 应用了介电电容模型进行分析.

主要成果:

  • 菲克斯弹性树叶产生离子热电压高达7V.
  • 在室温下达到5.6的高离子值.
  • 通过细胞的阴离子热扩散被确定为主要机制.
  • 活着的叶子在光诱导的梯度下产生热力.

结论:

  • 植物组织具有未知的能量收集功能.
  • 叶子干燥和电极选择显著放大了热电响应.
  • 可生物降解的植物性材料为热电能转换提供了一个可持续的平台.
  • 在体内离子热电测定显示了实时生物能量监测的潜力.