Gold core-labeled TiO2 nanoparticles for tracking behavior in complex matrices: synthesis, characterization, and demonstration
| Autor: | Alyssa R. Deline, William M. Young, Jeffrey A. Nason |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polyvinylpyrrolidone Materials Science (miscellaneous) technology industry and agriculture Ionic bonding Nanoparticle chemistry.chemical_element 02 engineering and technology respiratory system 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Characterization (materials science) Surface coating chemistry Chemical engineering medicine Particle Inductively coupled plasma 0210 nano-technology 0105 earth and related environmental sciences General Environmental Science medicine.drug Titanium |
| Zdroj: | Environmental Science: Nano. 5:956-968 |
| ISSN: | 2051-8161 2051-8153 |
| Popis: | Titanium dioxide nanoparticles (TiO2 NPs) are increasingly entering natural systems due to their widespread production and use. It is critical that TiO2 NP behavior is studied in real-world systems, but experimental work is complicated by the high levels of background titanium present in every environmental compartment. To assist in distinguishing between engineered NPs and background titanium, labeled particles with gold nanoparticle cores and TiO2 shells (Au@TiO2 NPs) were developed and the properties and behavior compared to unlabeled TiO2 NPs. Both particle types had primary particle diameters of approximately 200 nm and were stable in solutions at ionic strengths up to 500 mM due to a polyvinylpyrrolidone surface coating. To demonstrate utility, the Au@TiO2 NPs were used in several spike-and-recovery experiments in complex matrices such as activated sludge and a river water–sunscreen mixture. Au@TiO2 NPs were accurately quantified at using instrumental neutron activation analysis and inductively coupled plasma optical emission spectrometry. |
| Databáze: | OpenAIRE |
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