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首页> 外文期刊>RSC Advances >Transparent, stretchable, and conductive SWNT films using supramolecular functionalization and layer-by-layer self-assembly
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Transparent, stretchable, and conductive SWNT films using supramolecular functionalization and layer-by-layer self-assembly

机译：使用超分子官能化和层间自组装的透明，可拉伸和导电SWNT薄膜

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We demonstrate films of single-walled carbon nanotubes (SWNTs) on the elastomer polydimethylsiloxane (PDMS) that are stretchable, conductive, and transparent. Our fabrication method uses the supramolecular functionalization of SWNTs with conjugated polyelectrolytes to generate aqueous dispersions of positively- and negatively-charged SWNTs, followed by layer-by-layer self-assembly onto a PDMS substrate. Adding bilayers of positively- and negatively-charged SWNTs to the surface causes the sheet resistance and the % transmittance of the film to both progressively decrease. The sheet resistance decreases sharply in the first five bilayers as the layer-by-layer process efficiently establishes the percolation network, whereas the % transmittance declines more gradually. Films with 25 bilayers are transparent (75% at 550 nm) and conductive (560 ± 90 Ω □ ~(?1) ). The combination of electrostatic and π-stacking forces very effectively bind the SWNTs within the film, producing smooth film surfaces (root-mean-square roughness of 18 nm) and enabling the films to remain conductive up to 80% elongation. We demonstrate the use of the SWNT films as transparent conductive electrodes in light-emitting devices and as soft strain sensors that are both wearable and transparent.
机译：我们在弹性体聚二甲基硅氧烷（PDMS）上展示了单壁碳纳米管（SWNT）的薄膜，可伸展，导电和透明。我们的制造方法使用具有共轭的聚电解质的SWNT的超分子官能化，以产生正极和带负电的SWNT的水性分散体，然后用逐层自组装到PDMS基板上。向表面添加正极和带负电的SWNT的双层导致薄膜的电阻和薄膜的透射率逐渐减小。在第一五个双层中，在第一五个双层中急剧地降低了薄层电阻，因为逐层过程有效地建立了渗透网络，而％透射率更加逐渐下降。具有25个双层的薄膜是透明的（550nm处的75％）和导电（560±90Ω□〜（？1））。静电和π堆叠力的组合非常有效地结合薄膜内的SWNT，产生光滑的膜表面（18nm的根平方 - 平方粗糙度），并使薄膜保持高达80％的伸长率。我们证明了SWNT薄膜在发光装置中用作透明导电电极，并且作为可穿戴和透明的软应变传感器。

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