Scanning Probe Characterization of Heterostructured Colloidal Nanomaterials.
Scanning Probe Characterization of Heterostructured Colloidal Nanomaterials.
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DOI：
10.1021/cr500280t
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发表时间：
2015-07
期刊：
影响因子：
62.1
通讯作者：
S. Nanayakkara;J. van de Lagemaat;J. Luther
中科院分区：
文献类型：
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作者：
S. Nanayakkara;J. van de Lagemaat;J. Luther
材料结通过控制电流1 - 5形成了现代固态技术的基础，并且是数字电子、电子开关、信号放大和处理、6 - 9传感、发光二极管、10 - 12激光器、13，14和光电子学的关键部件。15− 19异质结产生于不同的半导体接触并形成突变界面。结物理学由每种材料的带隙、电子亲和势和化学势或费米能级以及能级或能带如何跨材料界面对齐（这可能受到偶极子或界面缺陷/合金化的影响）来控制。20，21多年来，对薄膜异质结的材料界面和薄膜特性进行工程设计，已经导致了许多先进器件的发展。纳米尺度和量子限制材料为光学和光电器件提供了新的物理特性，并激发了先进的合成方法，通过选择性地排列单个域来实现复杂功能，从而创建包含材料结的多组分纳米结构。纳米材料中异质结构的一些例子包括核壳量子点（QD）中的光致发光操纵，22 - 25减缓冷却，26减少闪烁，22，25，27具有等离子体辅助吸收增强28和掺杂的材料，29电荷分离界面，30 - 32能量泛函，33，34和应变35效应。这种纳米异质结构为现代化工业提供了有前途的新材料，如生物传感，36，37光催化，38 - 42和光催化。
Material junctions form the basis of modern solid-state technology by controlling current flow 1− 5 and are key components in digital electronics, electronic switches, signal amplification and processing, 6− 9 sensing, light-emitting diodes, 10− 12 lasers, 13, 14 and photovoltaics. 15− 19 A heterojunction arises when dissimilar semiconductors come into contact and form an abrupt interface. The junction physics are controlled by the band gap, electron affinity, and chemical potential or Fermi level of each material as well as how the energy levels or bands align across the material interface (which can be influenced by dipoles or interfacial defects/alloying). 20, 21 Over the years, engineering the material interface and film characteristics of thin-film heterojunctions has resulted in the development of many advanced devices.Nanoscale and quantum-confined materials offer new physics for optical and optoelectronic devices and have inspired advanced synthetic methods to create multicomponent nanostructures containing material junctions by selectively arranging individual domains for complex functionalities. Some examples of heterostructuring in nanomaterials include photoluminescence manipulation in core− shell quantum dots (QDs), 22− 25 slowed cooling, 26 reduced blinking, 22, 25, 27 materials with plasmon-assisted absorption enhancement 28 and doping, 29 charge-separating interfaces, 30− 32 energy funneling, 33, 34 and strain 35 effects. Such nanoheterostructures offer promising new materials for modernizing industries such as biological sensing, 36, 37 photovoltaics, 38− 42 and photocataly-