Deposition of Quantum Dots in a Capillary Tube

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• 作者：Yong Lin Kong ; Fran莽ois Boulogne ; Hyoungsoo Kim ; Janine Nunes ; Jie Feng ; Howard A. Stone
• 刊名：Langmuir
• 出版年：2015
• 出版时间：November 17, 2015
• 年：2015
• 卷：31
• 期：45
• 页码：12560-12566
• 全文大小：420K
• ISSN：1520-5827

文摘

The ability to assemble nanomaterials, such as quantum dots, enables the creation of functional devices that present unique optical and electronic properties. For instance, light-emitting diodes with exceptional color purity can be printed via the evaporative-driven assembly of quantum dots. Nevertheless, current studies of the colloidal deposition of quantum dots have been limited to the surfaces of a planar substrate. Here, we investigate the evaporation-driven assembly of quantum dots inside a confined cylindrical geometry. Specifically, we observe distinct deposition patterns, such as banding structures along the length of a capillary tube. Such coating behavior can be influenced by the evaporation speed as well as the concentration of quantum dots. Understanding the factors governing the coating process can provide a means to control the assembly of quantum dots inside a capillary tube, ultimately enabling the creation of novel photonic devices.