通过利用粒子聚合度的磁性 in situ 确定表面协调图案
Andreas Wolf1, Andreas Zink2, Lisa M S Stiegler3
1Department of Chemistry and Pharmacy, Professorship for Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany; Fraunhofer Institute for Silicate Research ISC, Neunerplatz 2, 97082 Wuerzburg, Germany.
Journal of colloid and interface science
|June 15, 2023
概括
磁粒子光谱 (MPS) 提供了一种快速的方法来分析液体中的超偏磁铁氧化物纳米粒子 (SPIONs). 这种技术揭示了SPION表面协调的离子选择性,使新的表征方法成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 分析化学 分析化学
背景情况:
- 超偏磁铁氧化物纳米粒子 (SPIONs) 对于诸如高热疗法和生物感知等应用至关重要.
- 现有的表面分析技术往往不适合对SPIONs进行现场液体研究.
- 磁粒子光谱 (MPS) 提供了磁纳米粒子相互作用的快速,现场分析.
研究的目的:
- 开发一种用于分析液体环境中的SPION表面化学的新方法.
- 通过使用MPS. 调查对SPION表面协调站点的阳离子选择性.
- 为了建立一个磁性指示的复合度计定位用于纳米粒子表征.
主要方法:
- 使用磁粒子光谱 (MPS) 来监测SPION聚合物的变化.
- 使用合剂 (例如,EDTA) 来诱导SPION的重新分散.
- 用分析超离心法 (AUC) 和低温传输电子显微镜 (cryo-TEM) 验证的MPS发现.
主要成果:
- MPS可以检测到SPION聚合物和表面协调中的阴离子诱导的变化.
- 化剂有效地去除了阳离子,导致SPION重新分散和改变了MPS信号.
- 显著的MPS信号变化需要微米大小的SPION聚合物,正如AUC和冷TEM所证实的那样.
结论:
- 展示了一种快速的现场方法,用于在光密介质中表征SPION表面协调图案.
- MPS为了解液体中的纳米颗粒-连接体相互作用提供了一种有价值的工具.
- 这种技术为纳米粒子分析提供了一种新的方法,类似于复杂度定位.
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