Synthesis of Cu–Co bimetallic nanoparticles using TiN-coated electrodes for glucose-sensing applications
| Autor: | Chia-Jung Yang, Kai-Ling Chuang, Fu-Hsing Lu, Hui-Ting Lee, Pei-Jung Tsai |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Metals and Alloys chemistry.chemical_element Nanoparticle 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Concentration ratio 0104 chemical sciences chemistry Chemical engineering Mechanics of Materials Transmission electron microscopy Materials Chemistry Particle 0210 nano-technology Tin Bimetallic strip |
| Zdroj: | Journal of Alloys and Compounds. 785:191-199 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.01.141 |
| Popis: | This study focuses on the synthesis of Cu–Co bimetallic nanoparticles (NPs) by electrodeposition on conductive TiN-coated electrodes for nonenzymatic glucose-sensing applications. By changing the (Cu/Co)sol. ratio in electrolytes, the atomic concentrations and particle sizes of the Cu–Co NPs over the TiN-coated substrates were tailored. It was easier to incorporate Cu (which exhibits a higher reduction potential) into the NPs than Co. The bimetallic features of Cu–Co NPs were verified by investigating the energy-dispersive spectroscopy/field-emission scanning electron microscopy and field-emission transmission electron microscopy high-resolution images with the corresponding fast Fourier transform patterns. Even a small amount of bimetallic Cu–Co NPs greatly enhanced the detection sensitivity of glucose because of both the synergistic and nanosize effects. At a [Cu/(Cu+Co)]sol. concentration ratio of 0.5, the glucose sensitivity of the obtained Cu–Co NPs with particle sizes of 50 ± 14 nm reached 1602 ± 92 μA cm−2 mM−1, which is much higher than that of the monometallic Cu or Co NPs and lies in the medium–high regime of reported values from the literature. |
| Databáze: | OpenAIRE |
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