Functional Paper-Based Platform for Rapid Capture and Detection of CeO2Nanoparticles.
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 (CeO2or 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.
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.
Ali
A
Othman
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.
Daniel
D
Andreescu
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.
Dinusha P
DP
Karunaratne
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.
S V
SV
Babu
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.
Silvana
http://orcid.org/0000-0003-3382-7939
S
Andreescu
functional membranes; ligand grafted; metal oxide; multivalent binding; nanoparticle tracking