Nanocasting Technique for Preparing Biomimetic Polyaniline with Artificial Hierarchical Surface Structures of a Natural Leaf for Gas Sensing
SSRN, ISSN: 1556-5068
2023
- 200Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
In this study, polyaniline (PANI) was synthesized with artificial biomimetic hierarchical surface structures (Bio-PANI) by using a nanocasting technique for application in gas sensing. First, oxidative polymerization of aniline monomers was performed in 1.0 M HCl solution containing ammonium persulfate (oxidant). Subsequently, a polydimethyl siloxane mold was used as a soft template to transfer the surface pattern of a natural Xanthosoma sagittifolium leaf (XSL) to the surface of PANI coating, which was then subjected to FTIR spectroscopy. The surface structure and wettability of natural XSL and artificial Bio-PANI surfaces were investigated through SEM and contact angle measurements, respectively. Electrochemical cyclic voltammetry and four-point probe technique, respectively, indicated considerably enhanced reversible redox and doping/dedoping capacities of Bio-PANI compared with those of PANI. For gas-sensing assessments, fabricating interdigitated electrodes (IDEs) coated with PANI or Bio-PANI. Gas-sensing properties of the IDEs were evaluated in terms of the sensors’ responsivity, repeatability, and selectivity. Notably, the Bio-PANI-coated IDE exhibited quicker and higher sensor response (~456%) than did the PANI-coated IDE. This difference may be attributed to the higher surface area of the Bio-PANI coating than that of the PANI coating, which markedly increased the responsivity of Bio-PANI to H2S gas compared with that of PANI.
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