A one-step electrodeposition of homogeneous and vertically aligned nanotubes with parahydrophobic properties (high water adhesion)
A one-step electrodeposition of homogeneous and vertically aligned nanotubes with parahydrophobic properties (high water adhesion)
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DOI：
10.1039/c5ta09253a
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发表时间：
2016-02
影响因子：
--
通讯作者：
Thierry Darmanin;F. Guittard
中科院分区：
文献类型：
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作者：
Thierry Darmanin;F. Guittard
在这里，我们首次报道了在没有表面活性剂和硬模板的情况下，通过萘并[2，3-b]硫代并[3，4-e][1，4]二恶英(NAFDOT)的一步电聚合，实现了对疏水(高水附力)垂直排列的纳米管。纳米管的形成可能是由于电聚合过程中原位产生的气泡被聚合物稳定所致。纳米管是通过循环伏安法或恒定电位获得的，但它们的形成高度依赖于沉积方法。循环伏安测试发现，纳米管的尺寸非常大(∅≈为300 nm)，并且与沉积扫描次数无关，而只有纳米管的密度增加。在恒定的电势下，所有形成纳米管的种子都是在第一时刻形成的，而纳米管的尺寸随着沉积电荷的增加而增加。在这里，即使聚合物本质上是高度亲水的(杨氏角θY=63.6°)，也可以获得高达135o的θw值。此外，放置在这些基板上的水滴即使倾斜90°也会粘住，显示出极高的附着力。这种材料可以用于水上运输和收获、能源系统和生物传感。
Here, we report for the first time parahydrophobic (high water adhesion) vertically aligned nanotubes by a one-step electropolymerization of naphtho[2,3-b]thieno[3,4-e][1,4]dioxine (NaphDOT) without surfactants and hard templates. The formation of nanotubes is probably due to the stabilization by the polymer of gas bubbles produced in situ during the electropolymerization process. The nanotubes are obtained by cyclic voltammetry or at constant potential, but their formation is highly dependent on the deposition method. From cyclic voltammetry it was found that the size of the nanotubes is extremely large (∅ ≈ 300 nm) and independent of the number of deposition scans, while only the density of nanotubes increases. At constant potential, all the seeds for the nanotube formation are created in the first moments, while the size of the nanotube increases with the deposition charge. Here, θw values up to 135° are obtained even if the polymer is intrinsically highly hydrophilic (Young's angle θY = 63.6°). Moreover, water droplets put on these substrates remain stuck even after an inclination of 90° revealing extremely high adhesion. Such materials could be used in water transportation and harvesting, energy systems and biosensing.