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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...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
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Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices

Published on: July 8, 2016

在导电和绝缘表面上通过光晶化制备金属-TCNQ电荷转移复合物.

Anthony P O'Mullane1, Nigel Fay, Ayman Nafady

  • 1School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.

Journal of the American Chemical Society
|January 30, 2007
PubMed
概括

研究人员开发了一种简单的光化学方法来合成金属-7,7,8,8-四亚诺基诺二甲 (TCNQ) 电荷转移复合体. 该技术允许对各种金属-TCNQ材料在各种基板上进行受控沉积,以实现潜在的电子应用.

科学领域:

  • 材料科学 材料科学 材料科学
  • 摄影化学的使用.
  • 纳米技术纳米技术

背景情况:

  • 金属有机电荷转移复合物,特别是金属-7,7,8,8-四亚诺基诺二甲 (TCNQ) 化合物,对于先进的电子应用至关重要.
  • 这些复合物的现有合成方法可能是基质特定的,缺乏多功能性.
  • 控制这些材料在各种表面上的形态和沉积仍然是一个挑战.

研究的目的:

  • 开发一种通用和多功能的光化学方法来合成金属-TCNQ电荷转移复合物.
  • 为了研究这些复合物的基质独立沉积.
  • 探索这些材料在内存存储和切换设备中的潜力.

主要方法:

  • 在乙二中对TCNQ的光激发与牺牲电子供体和金属子.
  • 用光化学方法将TCNQ减少为TCNQ(-) 单离子.
  • M(x+) [TCNQ]x晶体沉积到导电和非导电基板上.
  • 使用光学和扫描电子显微镜,IR和拉曼光谱学进行表征.

主要成果:

  • 建立了一种用于金属-TCNQ合成的通用光化学方法.
  • 沉积复合物的形态与金属有所不同:CuTCNQ (微棒),KTCNQ (微棒),AgTCNQ (纳米线),Co[TCNQ]2 (H2O) 2 (纳米棒/线).

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Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures

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  • CuTCNQ和AgTCNQ复合体显示出对内存存储和交换设备的承诺.

    • 结论:

    • 开发的光化学技术为合成各种金属-TCNQ复合物提供了一个简单而有效的途径.
    • 这种方法可以在任何基板上对金属-TCNQ材料进行受控的图案设计.
    • 这些发现为使用金属-TCNQ材料制造先进电子元件开辟了新的途径.