Department of Chemistry and Biomolecular Science, ‡Department of Chemical and Biomolecular Engineering, and §Center for Advanced Materials Processing, Clarkson University , Potsdam, New York 13699, United States.
ACS Appl Mater Interfaces. 2017 Apr 12;9(14):12893-12905. doi: 10.1021/acsami.7b02823. Epub 2017 Mar 31.
Development of systems for capture, sequestration, and tracking of nanoparticles (NPs) is becoming a significant focus in many aspects of nanotechnology and environmental research. These systems enable a broad range of applications for evaluating concentration, distribution, and effects of NPs for environmental, clinical, epidemiological, and occupational exposure studies. Herein, we describe the first example of a ligand-graft multifunctional platform for capture and detection of cerium oxide (CeO or ceria) NPs. The approach involves the use of redox-active ligands containing o-dihydroxy functionality, enabling multivalent binding, surface retention, and formation of charge transfer complexes between the grafted ligand and the NPs. Using this strategy, paper-based and microarray-printed platforms with NP-capture ability involving either catechol or ascorbic acid as ligands were successfully fabricated. Surface modification was determined by infrared spectroscopy, electron microscopy, X-ray spectroscopy, and thermogravimetric analysis. Functionality was demonstrated for the rapid assessment of NPs in chemical mechanical planarization (CMP) slurries and CMP wastewaters. This novel approach can enable further development of devices and separation technologies including platforms for retention and separation of NPs and measurement tools for detection of NPs in various environments.
开发用于捕获、隔离和跟踪纳米粒子（NPs）的系统，已成为纳米技术和环境研究众多方面的重要关注点。这些系统为评估 NPs 的浓度、分布和环境、临床、流行病学和职业暴露研究中的影响提供了广泛的应用。在此，我们描述了第一个用于捕获和检测氧化铈（CeO 或 ceria）NPs 的配体接枝多功能平台的示例。该方法涉及使用含有邻二羟基官能团的氧化还原活性配体，实现多价结合、表面保留以及接枝配体与 NPs 之间形成电荷转移复合物。使用该策略，成功制备了具有 NP 捕获能力的基于纸和微阵列印刷的平台，其配体为儿茶酚或抗坏血酸。表面修饰通过红外光谱、电子显微镜、X 射线光谱和热重分析确定。功能证明可用于快速评估化学机械平面化（CMP）浆料和 CMP 废水中的 NPs。这种新方法可以进一步开发包括用于保留和分离 NPs 的平台以及用于检测各种环境中 NPs 的测量工具的器件和分离技术。
