Development of highly-stable binder-free chemical sensor electrodes for p-nitroaniline detection

• Published in: Journal of colloid and interface science Vol. 494; pp. 300 - 306
• Main Authors: Ahmad, Rafiq, Tripathy, Nirmalya, Ahn, Min-Sang, Hahn, Yoon-Bong
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 15.05.2017
• Subjects: Binder-free; Chemical sensor; Highly-stable; p-nitroaniline detection; ZnO nanorods; ZnO nanorods; p-nitroaniline detection; Highly-stable; Chemical sensor; Binder-free
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2017.01.099

[Display omitted] •Solution-based, direct growth of ZnO nanorods on FTO electrode.•Used successfully for the detection of p-nitroaniline chemical.•As-fabricated sensor showed excellent sensitivity and outstanding long-term stability.•The chemical sensors were highly reproducible and repeatable. Herein, pre-seeded fluorine doped tin oxide (FTO) glass substrates were used as an electrode for zinc oxide nanorods (ZnO NRs) growth by a low-temperature solution route in order to fabricate binder-free high-sensitive chemical sensor. The vertically-grown ZnO NRs exhibited a more favorable active morphology and improved sensing properties for p-nitroaniline (pNA) detection. On investigation with different concentrations of pNA, the ZnO NRs/FTO electrode showed an excellent sensitivity (10.18μAμM−1cm−2) and low detection limit (0.5μM) with good selectivity, outstanding long-term stability, and high reproducibility. Collectively, the present work emphasizes the potency of ZnO NRs/FTO electrodes for fabrication of an efficient and reliable chemical sensing device with improved performances.