Abstract
Polypyrrole nanowires (PPy-NWs) are synthesized by a novel templateless approach based on non-static solution-surface (NSSS) electropolymerization. The mechanism responsible for PPy-NW formation is the simultaneous oxidation of pyrrole and water, with concomitant formation of hydroxyl radicals and dioxygen nanobubbles. In particular, a localized PPy-NW deposition at the solution-air interface is enabled by solution-surface electropolymerization due to the surface excess of the monomer at the interface favored by the large surface tension of the solvent. In the proposed approach, solution-surface electropolymerization is performed in non-static conditions (NSSS), as the solution-air interface is shifted by flowing the electrolyte solution over the electrode surface. This allows a PPy-NW homogeneous deposition on whatever large area electrode to be rapidly achieved. Parameters influencing the morphology of PPy-NWs are studied, particularly focusing on flow rate, pH of the electrolyte solution, and electropolymerization time. The growth process of PPy-NWs is examined and the way of tuning their resulting morphology is discussed. Morphological investigation by scanning electron microscopy and chemical/electrochemical characterization of PPy-NWs by X-ray photoelectron spectroscopy and cyclic voltammetry, respectively, further support the proposed nanowire formation mechanism. Nanowires with diameter in the range of 40–300 nm are obtained, and the possibility of depositing differently sized nanowires with a predetermined spatial distribution on the same substrate is also demonstrated.
Similar content being viewed by others
References
Li C, Bai H, Shi G (2009) Conducting polymer nanomaterials: electrosynthesis and applications. Chem Soc Rev 38:2397–2409
Yoon H, Jang J (2009) Conducting-polymer nanomaterials for high-performance sensor applications: issues and challenges. Adv Funct Mater 19:1567–1576
Surdo S, Strambini LM, Malitesta C, Mazzotta E, Barillaro G (2012) Highly conformal growth of microstructured polypyrrole films by electrosynthesis on micromachined silicon substrates. Electrochem Commun 14:1–4
Liu J, Lin Y, Liang L, Voigt JA, Huber DL, Tian ZR, Coker E, Mckenzie B, Mcdermott M (2003) Templateless assembly of molecularly aligned conductive polymer nanowires: a new approach for oriented nanostructures. Chemistry 9:604–611
Sakaguchi H, Matsumura H, Gong H (2004) Electrochemical epitaxial polymerization of single-molecular wires. Nat Mater 3:551–557
Li M, Wei Z, Jiang L (2008) Polypyrrole nanofiber arrays synthesized by a biphasic electrochemical strategy. J Mater Chem 18:2276
Zang J, Li CM, Bao S-J, Cui X, Bao Q, Sun CQ (2008) Template-free electrochemical synthesis of superhydrophilic polypyrrole nanofiber network. Macromolecules 41:7053–7057
Fakhry A, Debiemme-Chouvy C (2014) Templateless electrogeneration of polypyrrole nanostructures : impact of the anionic composition and pH of the monomer solution. J Mater Chem 2:9859–9865
Fakhry A, Cachet H, Debiemme-Chouvy C (2015) Mechanism of formation of templateless electrogenerated polypyrrole nanostructures. Electrochim Acta 179:297–303
Debiemme-Chouvy C (2009) Template-free one-step electrochemical formation of polypyrrole nanowire array. Electrochem Commun 11:298–301
Lee S, Sung H, Han S, Paik W (1994) Polypyrrole film formation by solution-surface electropolymerization: influence of solvents and doped anions. J Phys Chem 98:1250–1252
Pei Q, Qian R (1992) Electrochemical polymerization of pyrrole in aqueous buffer solutions. J Electroanal Chem 322:153–166
Nath A, Contractor Q (2004) A study of polypyrrole films formed at the liquid/vapor interface. J Electroanal Chem 571:9–14
Song EH, Paik W, Chon J-K (1988) Electrochemical polymerization of pyrrole in aqueous solutions. 1. Comparison of solution-surface-growth and in-solution-growth methods. Bull Kor Chem Soc 9:413–414
Pringle JM, Forsyth M, Wallace GG, Macfarlane DR (2006) Solution—surface electropolymerization : a route to morphologically novel poly (pyrrole) using an ionic liquid. Macromolecules 39:7193–7195
Li M, Zhu H, Mao X, Xiao W, Wang D (2013) Electropolymerization of polypyrrole at the three-phase interline: influence of polymerization conditions. Electrochim Acta 92:108–116
Bak E, Donten ML, Donten M, Stojek Z (2005) Electrodeposition of polymer next to the three-phase boundary. Electrochem Commun 7:1098–1104
Zhu H, Gao L, Li M, Yin H, Wang D (2011) Fabrication of free-standing conductive polymer films through dynamic three-phase interline electropolymerization. Electrochem Commun 13:1479–1483
Gergely A, Inzelt G (2001) Electropolymerization of 3-methylthiophene at liquid 3-methylthiophene/aqueous solution/graphite three-phase junction. Electrochem Commun 3:753–757
Lee JI, Cho SH, Park SM, Kim JK, Kim JK, Yu J-W, Kim YC, Russell TP (2008) Highly aligned ultrahigh density arrays of conducting polymer nanorods using block copolymer templates. Nano Lett 8:2315–2320
Lee HJ, Park SM (2005) Electrochemistry of conductive polymers 37. Nanoscale monitoring of electrical properties during electrochemical growth of polypyrrole and its aging. J Phys Chem B 109:13247–13254
Lu M, Li XH, Li HL (2002) Synthesis and characterization of conducting copolymer nanofibrils of pyrrole and 3-methylthiophene using the template-synthesis method. Mater Sci Eng A 334:291–297
Demoustier-Champagne S, Stavaux P-Y (1999) Effect of electrolyte concentration and nature on the morphology and the electrical properties of electropolymerized polypyrrole nanotubules. Chem Mater 11:829–834
Malitesta C, Losito I, Sabbatini L, Zambonin PG (1995) New findings on polypyrrole chemical structure by XPS coupled to chemical derivatization labelling. J Electron Spectros Relat Phenomena 76:629–634
Bard AJ, Faulkner LR (2001) Electrochemical methods: fundamentals and applications, 2nd edn. John Wiley and Sons, New York (USA)
Wang X, Gu X, Yuan C, Chen S, Zhang P, Zhang T, Yao J, Chen F, Chen G (2004) Evaluation of biocompatibility of polypyrrole in vitro and in vivo. J Biomed Mater Res A 68:411–422
Acknowledgments
This activity was partly funded by the Italian Ministry of University and Research (MIUR) Futuro in Ricerca (FIR) program under Grant no. RBFR122KL1 (SENS4BIO).
Author information
Authors and Affiliations
Corresponding author
Additional information
Dedication in memory of Pier Giorgio Zambonin
Rights and permissions
About this article
Cite this article
Turco, A., Mazzotta, E., Di Franco, C. et al. Templateless synthesis of polypyrrole nanowires by non-static solution-surface electropolymerization. J Solid State Electrochem 20, 2143–2151 (2016). https://doi.org/10.1007/s10008-016-3206-7
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10008-016-3206-7