期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 401, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2023.135041
关键词
High-entropy alloy; Nanochain-like internetworks; Label-free immunosensor; Neuron-specific enolase; Cocktail effect
In this study, self-supported PtPdMnCoFe high-entropy alloy with nanochain-like internetworks was synthesized and found to be effective in reducing H2O2. It was used as a signal amplifier for the development of a novel label-free electrochemical amperometric immunosensor for ultrasensitive determination of biomarker NSE. The sensor showed a broad linear range and low detection limit for NSE immunoassay, and demonstrated satisfactory results in quantifying NSE in human serum samples.
High-entropy nanomaterials are regarded as the new research hotspots for their intriguing cocktail effect. Herein, self-supported PtPdMnCoFe high-entropy alloy with nanochain-like internetworks (PtPdMnCoFe HEAINN) were synthesized by a one-pot co-reduction method, where newly-generated H2 bubbles served as dynamic template, as identified by a series of characterizations. The high-entropy architecture was certificated effectiveness for reduction of H2O2, which was explored as signal amplifier to develop a novel label-free electrochemical amperometric immunosensor for ultrasensitive determination of biomarker neuron-specific enolase (NSE). In the optimized analytical surroundings, the as-fabricated sensor showed a broad linear range of 0.1 pg mL-1 to 200 ng mL-1 for immunoassay of NSE with a low limit of detection (LOD = 0.0036 pg mL-1, S/N = 3), coupled by its quantification in human serum samples with satisfactory results. This work provides valuable guidance for potential applications of high-entropy alloyed materials in biosensors and immunoanalysis.
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