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Portable Electrochemical Sensing of Indole-3-acetic Acid Based on Self-assembled MXene and Multi-walled Carbon Nanotubes Composite Modified Screen-printed Electrode |
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| Authors: | Yuxue Chen Yunxiu Sun Yanyan Niu Baoli Wang Zejun Zhang Lina Zeng Lin Li Wei Sun |
| Institution: | 1. Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158 China;2. Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158 China
These authors contributed to the work equally as co-first authors;3. College of Physics and Electronic Engineering, Hainan Normal University, Haikou, 571158 China |
| Abstract: | As a typical plant hormone, indole-3-acetic acid (IAA) can regulate the biological activities including division, growth and differentiation of plant cells. In this paper, a MXene and multi-walled carbon nanotubes composite was prepared by self-assembly procedure, which was modified on screen-printed electrode (SPE) to construct a wireless portable electrochemical sensor. Electrochemical investigations of IAA were studied by cyclic voltammetry and an irreversible oxidation process could be observed. The excellent electroanalytical method of IAA was realized on the modified SPE with the detection range as 0.05–125.0 μmol/L and the detection limit as 16.7 nmol/L. The sensor was used for IAA content analysis in different part of pea seedlings with satisfactory results. |
| Keywords: | MXene Multi-walled carbon nanotubes Electrochemistry Indole-3-acetic acid |