Delayed Capillary Flow of Elastomers: An Efficient Method for Fabrication and Nanofunctionalization of Flexible, Foldable, Twistable, and Stretchable Electrodes from Pyrolyzed Paper. (18th November 2019)

• Record Type: Journal Article
• Authors: Damasceno, Sergio; Corrêa, Cátia Crispilho; Gouveia, Rubia Figueredo; Strauss, Mathias; Bufon, Carlos César Bof; Santhiago, Murilo
• Is Part Of: Advanced Electronic Materials. Volume 6:Number 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-11-18
• Subjects: flexible electrodes -- nanofilms -- polydopamine -- pyrolyzed paper -- stretchable electrochemical devices; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201900826
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Pyrolyzed cellulose‐based materials are extensively used in many fields for many different applications due to their excellent electrical properties. However, pyrolyzed materials are extremely fragile and prone to crack. To address this issue, a new fabrication method is reported to delay the capillary flow of elastomeric materials into the porous structure of the paper. By changing the surface chemistry and porosity of the material, the capillary flow of the elastomer through the porous structure is delayed. Delayed capillary flow of elastomers (DCFE method) ensures both extremely high mechanical stability and electrochemical performance to the devices. Impressively, the electrochemical devices can be bent, folded, twisted, and stretched at 75% of their original length without hindering their electrochemical response. Moreover, cooperative nanofilms are prepared using a co‐deposition process with Meldola's blue (MB) and polydopamine (PDA). While MB guarantees electrocatalytic properties toward nicotinamide adenine dinucleotide (NADH) electrooxidation, PDA increases the wettability of the surfaces and contribute to addressing hydrophobicity issues of elastomer‐based devices. Remarkably, the nanofilms have unprecedented properties by self‐collecting aqueous liquids. Furthermore, extreme mechanical tests do not impact the electrochemical performance of the nanofilms. Abstract : Stretching the mechanical and electrochemical properties of highly conductive pyrolyzed paper sheets is demonstrated. A new bioinspired method is developed to prepare flexible electrochemical devices with both good mechanical and electrochemical properties using materials that are prone to crack easily. Moreover, a bioinspired polydopamine bionanofilm with remarkable electrocatalytic and hydrophilic properties is developed.