Polypyrrole Whelk‐Like Arrays toward Robust Controlling Manipulation of Organic Droplets Underwater,Small

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Polypyrrole Whelk‐Like Arrays toward Robust Controlling Manipulation of Organic Droplets Underwater
Small ( IF 13.0 ) Pub Date : 2017-08-28 , DOI: 10.1002/smll.201701938
Xianyong Lu ₁ , Zhuang Kong ₁ , Guozheng Xiao ₁ , Chao Teng ₂ , Yunan Li ₁ , Guangyuan Ren ₁ , Shuangbao Wang ₁ , Ying Zhu ₁ , Lei Jiang ₂

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Whelk‐like polypyrrole (PPy) arrays film is successfully prepared by electropolymerization of pyrrole in the presence of low‐surface‐energy tetraethylammonium perfluorooctanesulfonate (TEAPFOS) as dopant. The underwater wettability of PPy whelk‐like arrays can be successfully tuned by electrical doping/dedoping of PFOS ions. Interestingly, CCl₄ droplets with microliter‐size as a representative sample are gathered together to form a larger droplet underwater at the potential of +0.8 V (vs Ag/AgCl), because PPy is in its PFOS‐doped states. Note that CCl₄ droplet can climb uphill successfully on the inclined whelk‐like arrays PPy film under the applied potential of −1.0 V (vs Ag/AgCl), which may be attributed to wettability gradient derived from different oxidation states of PPy induced by electrochemical potential. These results may provide a simple strategy for on‐demand manipulation of organic droplets underwater at low voltage.

中文翻译：

Polypyrrole Whelk-like阵列可对水下有机液滴进行鲁棒控制

在低表面能全氟辛烷磺酸四乙铵（TEAPFOS）作为掺杂剂的情况下，通过吡咯的电聚合成功制备了类似Whelk的聚吡咯（PPy）阵列膜。可以通过电掺杂/去掺杂PFOS离子成功地调节PPy螺状阵列的水下润湿性。有趣的是，以微升大小的CCl ₄小滴为代表的样本聚集在一起，以+0.8 V（vs Ag / AgCl）的势能在水下形成更大的小滴，因为PPy处于PFOS掺杂状态。注意CCl ₄在-1.0 V（vs Ag / AgCl）的施加电势下，液滴可以在倾斜的类似Wyk状的阵列PPy膜上成功地爬上山坡，这可能归因于由电化学电势引起的不同PPy氧化态引起的可湿性梯度。这些结果可能为在低压下按需操作水下有机液滴提供一种简单的策略。

更新日期：2017-08-28

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