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相关概念视频

Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...

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相关实验视频

Updated: Jun 20, 2026

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
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通过一种可扩展,可处理溶液的方法,构成调节的过渡金属二甲基化物纳米片通过.

Rebekah A Wells1, Nicolas J Diercks1, Victor Boureau2

  • 1Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland. Rebekah.Wells@epfl.ch.

Nanoscale horizons
|February 5, 2024
PubMed
概括

我们开发了一种可扩展的液相脱皮方法,以创建可调节的二维 (2D) 过渡金属二二原化 (TMD) 纳米板. 这种方法使得用于先进电子设备的大面积TMD材料的成本高效生产成为可能.

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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

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相关实验视频

Last Updated: Jun 20, 2026

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
10:41

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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
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Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

354

科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 固态物理 固态物理

背景情况:

  • 通过合金,二维 (2D) 过渡金属二甲基化物 (TMD) 提供可调节的光电子特性.
  • 合金2DTMD的当前制造方法对于大面积设备生产是不可扩展的.
  • 开发具有成本效益的,大规模合成合金TMD对于下一代电子产品至关重要.

研究的目的:

  • 引入一种通用,可扩展的方法,用于生产可调整组合的2DTMD纳米片.
  • 通过这种方法合成的合金TMD中证明光电子特性可调性.
  • 为了使大面积 (m^2) 合金TMD设备的成本效益高的生产.

主要方法:

  • 利用商业可用的粉末和液相脱皮,用于TMD纳米板合成.
  • 系统地将 (Mo) 和 (W) 与硫 (S) 或 (Se) 合金,以创建各种TMD组合物.
  • 使用高分辨率扫描传输电子显微镜 (STEM) 和光谱技术对合成的纳米片进行表征.

主要成果:

  • 成功地生产了大量可组合调节的2DTMD纳米片,包括Mo(1-x) W(x) S2,Mo0.5W0.5Se2,MoSSe,WSSe和Mo0.5W0.5SSe.
  • 证明光电子特性可以通过调整合金TMD的组成来精确调整.
  • 证实了合成纳米片的原子结构和化学/光电子特性.

结论:

  • 开发的液相脱皮方法是升级定制TMD纳米片的重大进步.
  • 这种横向方法促进了具有可调节性质的多种TMD组合的制作.
  • 这些发现为合金TMD在大面积电子设备中的广泛应用铺平了道路.