Year: 2026
Type: article
Abstract: Dopamine (DA) is an important catecholamine neurotransmitter in human metabolism that is associated with various critical diseases. Accurate detection of DA is of great significance for the diagnosis of these diseases. Here, we constructed a sensitive electrochemical sensor, S, N co-doped multi-walled carbon nanotubes (MWCNTs-N-S) loaded with Pd nanoparticles (Pd/MWCNTs-N-S). The linear range of the Pd/MWCNTs-N-S sensor is from 0.0001 to 2.0 mM, and the limit of detection (LOD) is 4.37 nM (S/N = 3) for DA detection. The improved detection performance of this sensor is attributed to the optimization of MWCNTs carrier structure and surface properties by N, S co-doping, as well as the significant improvement of electrochemical surface area (ECSA) for the commendable dispersion of Pd nanoparticles (3.79 nm). What is more, the Pd/MWCNTs-N-S sensor also exhibits good reproducibility, stability, and anti-interference ability. Overall, this study presents a straightforward strategy for the potential applications of Pd-based double co-doped MWCNTs sensors.
Source: Molecules
Authors: Jingjing Du, Jinpu Xie, Yukun Tang, Zhaopu Li, Yinchen Liu, Kun Qian, Tengfei Duan, Xinrui Wu, Zengmin Tang, Hengde Zhang, Jialing Zhu, Pingping Yang, Lijian Xu
Institution: Hunan University of Technology
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,258
OpenAlex ID: W7131287680