Formation of long range ordered arrangement of quantum dots with the help of lateral centripetal flow |
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Authors: | Yunzhi Fu Jinru Li Long Jiang |
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Institution: | a Key Laboratory of Colloid and Interface Sciences, Chinese Academy of Sciences, Zhong Guan Cun, No. 2 Bei Yi Jie, Beijing 100080, PR China b Chemistry and Chemical Engineering Department, Suzhou University, Su Zhou 215006, PR China |
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Abstract: | A simple “chimney” method was used to eliminate the voids in an arrangement of quantum dots sized 2 nm on a solid substrate, which resulted in a large well ordered superlattice of area in the order more than 1 μm2. Based on the principle of speeding up the interparticle interaction of nanoparticles to overcome the particle-substrate one, a lateral centripetal force originated from a glass tube acting as a chimney in a simple evaporation device is imposed. This method allows the packing process to be controlled in a mechanical force field, that is, with the same nanogold dispersion different patterns on a substrate—from separate dots to an ordered compact monolayer or even a multilayer structure—could be easily obtained. |
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Keywords: | Gold nanoparticle Self-assembly of quantum dots Nanopattering Adhesion Lateral centripetal flow Brownian movement Surface structure Crystallization |
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