在基于颜色变化时间的色彩测试中,Aptamer功能化金纳米颗粒用于检测离子,作为信号读出信号
Bin Cai1, Tingyan Ren1, Xiaowei Yu1
1Ministry of Ecology and Environment, South China Institute of Environmental Science, Guangzhou, 510655, China.
Mikrochimica acta
|January 3, 2024
概括
一种新的色度测量方法快速检测水中的离子 (Hg2+). 这种方法使用了DNA功能化的金纳米粒子,并测量了敏感的量化颜色变化时间.
科学领域:
- 纳米技术纳米技术
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 离子 (Hg2+) 构成重大环境和健康风险.
- 现有的检测方法可能很复杂或缺乏灵敏度.
- 测色方法为快速和经济有效的检测提供了潜力.
研究的目的:
- 开发一种通用和快速的色度计策略,用于量化水溶液中的离子.
- 为了利用离子和DNA功能化的金纳米粒子之间的相互作用来产生信号.
- 为环境监测建立一种灵敏可靠的检测方法.
主要方法:
- 黄金纳米颗粒 (AuNPs) 的功能化与硫化DNA.
- 利用Hg2+与胆氨酸-Hg2+-胆氨酸的特定结合.
- 在p-nitrophenol和NaBH4.4的存在下测量AuNPs的催化活性.
- 基于使用UV-Vis光谱的颜色变化时间 (CCT) 量化Hg2+.
主要成果:
- 观察到Hg2+度和CCT之间的直接相关性.
- 该方法实现了Hg2+的0.20nM检测极限,远低于EPA标准.
- 为Hg2+建立了10-600nM的线性检测范围.
- 颜色变化时间 (CCT) 作为一个敏感的指标,超过了传统的基于吸收的方法.
结论:
- 开发的色度测量方法为Hg2+检测提供了灵敏和快速的方法.
- 该策略利用了对信号放大AuNP催化活性的固体阻碍效应.
- 这种方法为监测水资源中的污染提供了一个有前途的工具.
相关概念视频
Labeling DNA Probes
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
DNA Microarrays
Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...


