Growth of a semiconductor nanoparticle ring during the drying of a suspension droplet
Growth of a semiconductor nanoparticle ring during the drying of a suspension droplet
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DOI：
10.1021/la980702q
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发表时间：
1999-02-16
期刊：
影响因子：
3.9
通讯作者：
Yamaguchi, Y
中科院分区：
文献类型：
--
作者：
Maenosono, S;Dushkin, CD;Yamaguchi, Y
提出了关于包括胶体半导体纳米颗粒（量子点）的阵列的生长过程的第一研究。两种类型的颗粒，CdS和CdSe/CdS（核/壳），分别悬浮在吡啶和水，已被使用。将含有颗粒的液滴置于固体基质上，并使溶剂在氮气气氛中蒸发。结果，在液滴周边形成环形多层，环的宽度取决于颗粒的体积分数。环生长的动力学描述的理论模型，占实验参数的影响。所报道的研究可以作为制备更复杂和有序的半导体纳米颗粒阵列的背景，其光学性质可以用于发光和转换器件。
The first study on the growth process of an array comprising colloidal semiconductor nanoparticles (quantum dots) is presented. Two types of particles, CdS and CdSe/CdS (core/shell), suspended in pyridine and water, respectively, have been used. A liquid drop containing the particles is placed on a solid substrate, and the solvent is allowed to evaporate in a nitrogen atmosphere. As the result, a ring-shaped multilayer forms at the drop periphery, with the ring width depending on the particle volume fraction. The kinetics of ring growth is described by a theoretical model which accounts for the effect of experimental parameters. The reported study can serve as background for the preparation of more sophisticated and ordered arrays of semiconductor nanoparticles whose optical properties can be utilized in light-emitting and -converting devices.