Synthesis of transparent dispersion of monodispersed silver nanoparticles with excellent conductive performance using high-gravity technology
Synthesis of transparent dispersion of monodispersed silver nanoparticles with excellent conductive performance using high-gravity technology
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利用超重力技术合成具有优异导电性能的单分散纳米银透明分散体
DOI：
10.1016/j.cej.2016.03.076
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发表时间：
2016-07
影响因子：
15.1
通讯作者：
Jian-Feng Chen
中科院分区：
文献类型：
--
作者：
Xing-Wei Han;Xiao-Fei Zeng;Jie Zhang;Haifeng Huan;Jie-Xin Wang;Neil R. Foster;Jian-Feng Chen
银纳米粒子的透明分散对于制备柔性显示器、太阳能电池等印刷电子器件的透明导电涂层具有重要意义。然而，大规模生产透明分散的银纳米粒子仍然是一个巨大的挑战。本文利用旋转填充床(RPB)反应器，采用超重力方法合成了具有优良导电性能的单分散银纳米颗粒透明分散体，易于实现规模化生产。在纳米分散的基础上，进一步制备了透明导电膜。所合成的纳米银颗粒在液体介质中呈单分散状态，平均粒径约为7 nm。与搅拌釜式反应器(STR)相比，RPB法制备的透明分散体中的纳米银颗粒平均直径更小，粒径分布更窄，稳定性更好。具有连续渗流网络结构的透明导电膜具有良好的透明性和导电性。方阻为98.1Ω/-和12.7Ω/-的薄膜的可见光透过率分别可达91%和85%。预计超重力技术将为制备透明电子器件的透明银分散体的大规模制备提供一种有前途的策略。
Transparent dispersion of silver nanoparticles (Ag-NPs) is important for transparent conductive coatings to fabricate the printed electronic devices such as flexible displays and solar cells. However, it is still great challenge to produce the transparent dispersion of Ag-NPs in large scale. In this work, we synthesize the transparent dispersion of monodispersed Ag-NPs with excellent conductive performance by a high-gravity strategy using rotating packed bed (RPB) reactor, which is easy to realize the large scale production. Based on the nano-dispersion, the transparent conductive films are further fabricated. The as-synthesized Ag-NPs are monodispersed in liquid medium with the average diameter about 7 nm. Compared with stirred tank reactor (STR), the Ag-NPs in transparent dispersions prepared by RPB have a smaller average diameter, a narrower particle size distribution (PSD) and better stability. The transparent conductive films with continuous percolated network structure exhibit excellent transparency and conductive properties. The visible transmittance of the films with a sheet resistance of 98.1 Ω/□ and 12.7 Ω/□ can reach 91% and 85% respectively. It is expected that the high-gravity technology would provide a promising strategy for the large-scale preparation of transparent silver dispersion for fabricating transparent electric devices.
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