A bioinspired approach to fabricate fluorescent nanotubes with strong water adhesion by soft template electropolymerization and post-grafting

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:606

Article

Sathanikan, Ananya¹  Ceccone, Giacomo²  Banuls-Ciscar, Jorge²  Pan, Miaobo³  Kamal, Fadwa⁴  Bsaibess, Talia⁴  Gaucher, Anne⁴  Prim, Damien⁴  Meallet-Renault, Rachel³  Colpo, Pascal²  Amigoni, Sonia¹  Guittard, Frederic¹  Darmanin, Thierry¹ 

[1] Univ Cote dAzur, NICE Lab, F-06100 Nice, France

[2] European Commiss, DG Joint Res Ctr, TP125,Via Fermi, I-21027 Ispra, Italy

[3] Univ Paris Saclay, CNRS, Inst Sci Mol Orsay ISMO, F-91405 Orsay, France

[4] Univ Versailles St Quentin, UMR CNRS 8180, Inst Lavoisier Versailles, 45 Ave Etats Unis, F-78035 Versailles, France

关键词: Surface functionalization;    Wettability;    Hydrophobicity;    Surface analysis;    Fluorescence;    Conducting polymers;    Nanotubes;   

DOI  :  10.1016/j.jcis.2021.08.013

来源: Elsevier

【 摘 要 】

Hypothesis: In this original work, we aim to control both the surface wetting and fluorescence properties of extremely ordered and porous conducting polymer nanotubes prepared by soft template electropolymerization and post-grafting. For reaching this aim, various substituents of different hydrophobicity and fluorescence were post-grafted and the post-grafting yields were evaluated by surface analyses. We show that the used polymer is already fluorescent before post-grafting while the post-grafting yield and as a consequence the surface hydrophobicity highly depend on the substituent. Experiments: Here, we have chosen to chemically grafting various fluorinated and aromatic substituents using a post-grafting in order to keep the same surface topography. Flat conducting polymer surfaces with similar properties have been also prepared for determining the surface energy with the Owens-Wendt equation and estimating the post-grafting yield by X-ray Photoemission Spectroscopy (XPS) and Time of Flight Secondary Emission Spectrometry (ToF-SIMS). For example, using fluorinated chains of various length (C4F9, C6F13 and C8F17), it is demonstrated that the surface hydrophobicity and oleophobicity do not increase with the fluorinated chain length due to the different post-grafting yields and because of the presence of nanoroughness after post-grafting. Findings: These surfaces have high apparent water contact angle up to 130.5 degrees but also strong water adhesion, comparable to rose petal effect even if there are no nanotubes on petal surface. XPS and ToF-SIMS analyses provided a detailed characterisation of the surface chemistry with a qualitative classification of the grafted surfaces (F6 > F4 > F8). SEM analysis shows that grafting does not alter the surface morphology. Finally, fluorescence analyses show that the polymer surfaces before post-treatment are already nicely fluorescent. Although the main goal of this paper was and is to understand the role of surface chemistry in tailoring the wetting properties of these surfaces rather than provide specific application examples, we believe that the obtained results can help the development of specific nanostructured materials for potential applications in liquid transport, or in stimuli responsive antimicrobial surfaces. (C) 2021 Elsevier Inc. All rights reserved.

【 授权许可】

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