使用共振雷利散射的磁性罗达胺B印记聚烯胺pH探测器
Leyao Zhang1,2, Wenxin Wan1,2, Guiqing Wen1,2
1Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China.
Langmuir : the ACS journal of surfaces and colloids
|September 4, 2025
概括
一种新的磁性分子印记聚合物纳米探针被开发用于pH传感. 这种新的传感器在检测水和食品样本中的pH值方面具有很高的灵敏度和稳定性.
科学领域:
- 材料科学
- 分析化学
- 纳米技术
背景情况:
- 开发用于环境和食品监测的敏感和选择性传感器至关重要.
- 分子印记聚合物 (MIP) 为特定的分析物提供了量身定制的识别点.
- 磁纳米粒子提供了一个易于分离的平台,
研究的目的:
- 开发一种用于pH检测的新型纳米表面分子印记聚烯胺纳米探针 (Fe3O4@MIPB).
- 在印制聚合物中使用罗达胺B (RhB) 作为模板和传感分子.
- 建立基于共振雷利散射 (RRS) 和磁纳米粒子的新pH传感平台.
主要方法:
- 使用Fe3O4磁纳米粒子,RhB,烯胺 (AM) 和乙烯基醇二甲酸盐 (EGDMA) 制备Fe3O4@MIPB.
- 使用扫描电子显微镜 (SEM),歇斯底里循环,富里埃变换红外光谱 (FT-IR) 和RRS光谱进行表征.
- 通过监测由于RRS-能量转移 (RRS-ET) 效应而导致的RRS强度变化来量化pH.
主要成果:
- Fe3O4@MIPB纳米探测器在375nm显示出强烈的RRS峰值.
- 观察到RRS强度的线性下降,pH值在2. 2- 6. 2范围内增加,这与增强的RRS- ET有关.
- 在7. 0- 9. 8的pH范围内观察到RRS强度的进一步线性下降.
- 传感器在李河水 (0.43-1.4%) 和食品样本中检测出较低的相对标准偏差 (RSD).
结论:
- 成功开发了一种新的RhB印制磁性分子印制聚合物与RRS结合用于pH检测.
- 开发的传感器具有高灵敏度,广泛的pH检测范围,在复杂的矩阵中具有出色的选择性和稳定性.
- 这种方法为现实样本的pH检测提供了一个有前途的新方法.
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