表面增强的尖端金色微针装饰在笔石墨微电极上,作为高效的电化学传感平台,用于在血清和尿液样本中敏感检测NADH
Mani Arivazhagan1, Paramasivam Shanmugam2, Samikannu Prabu3
1Research Laboratory for Analytical Instrument and Electrochemistry Innovation, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Research Laboratory on Advanced Materials for Sensor and Biosensor Innovation, Materials Science Research Center, and Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
Talanta
|November 5, 2025
概括
研究人员在石墨微电极上开发了新的金色微针,用于敏感的NADH检测. 这种类似酶的平台为诊断疾病和监测代谢功能提供了快速,可靠的传感.
科学领域:
- 电化学 电化学 电化学
- 纳米材料科学 科学 纳米材料科学
- 生物医学传感传感器
背景情况:
- 准确的尼古丁胺胺二核酸 (NADH) 检测对于诊断代谢和神经退行性疾病至关重要.
- NADH水平是线粒体功能和细胞能量代谢的关键指标.
- 现有的NADH检测方法往往缺乏灵敏度,速度或稳定性.
研究的目的:
- 设计和合成一个微型,高度敏感的电化学传感器用于NADH检测.
- 创建一个酶模拟平台,利用金纳米结构来增强NADH氧化.
- 在灵敏度,响应时间和反干扰能力方面评估传感器的性能.
主要方法:
- 使用绿色电化学沉积,在笔石墨微电极 (PGME) 上装饰的尖端超分支金微针 (Au MND) 的制造.
- 对于NADH氧化的Au MNDs@PGME平台的电化学表征.
- 评估传感器性能,包括灵敏度,线性范围,响应时间和检测极限 (LOD).
- 对抗干扰性质的评估和在真实生物样本 (人体血清和尿液) 中的应用.
主要成果:
- 在 Au MNDs@PGME 展示了对 NADH 氧化直接的电催化特性.
- 传感器表现出高灵敏度 (62.80 μA/μM cm−2),两个线性范围 (0.1-4.5 μM和4.5-54.5 μM),以及快速响应时间 (<2秒).
- 该传感器显示出出色的抗干扰能力,并成功应用于在人体血清和尿液样本中检测NADH.
结论:
- 开发的Au MNDs@PGME传感器作为一个强大的酶模拟平台,用于敏感和可靠的NADH检测.
- 金色微针的独特纳米结构和利的边缘提高了电化学性能.
- 这种微型传感器具有临床诊断和生物医学应用的巨大潜力.
相关概念视频
01:15Potentiometry: Membrane Electrodes
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
01:18Effects of EDTA on End-Point Detection Methods
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...