Size-controlled gold nanoparticles inside polyacrylamide microgels
| Autor: | A. Barrera, M. Díaz, I. Ceja, S. López-Cuenca, M. Rabelero, S. Y. Martínez-Salazar, V. V. A. Fernández, J. Aguilar |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Polyacrylamide Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Polymerization Nanocrystal chemistry Chemical engineering Colloidal gold Transmission electron microscopy Polymer chemistry Materials Chemistry Particle size 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Applied Polymer Science. 133 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.43560 |
| Popis: | Gold nanoparticles (AuNPs) of different sizes were synthesized into a crosslinked network of polyacrylamide (PAAm) microgels. PAAm was prepared by means of semicontinuous inverse heterophase polymerization under monomer-starving conditions with a z-average particle size of 384 ± 18 nm. AuNPs with controlled size were obtained by a reduction reaction of Au+3 to Au0 from a gold(III) chloride trihydrate (HAuCl4) solution inside microgel the crosslinked network (AuNP-PAAm). The reduction reaction was verified for 2 h by ultraviolet–visible spectroscopy (UV–vis). AuNP–PAAm exhibited a particle size between 288 ± 12 and 230 ± 15 nm at HAuCl4 concentrations of 0.4 and 1.3 mM, respectively. The AuNP–PAAms were observed by transmission electron microscopy, and their sizes were determined to be 19 ± 2 nm (1.3 mM) and 17 ± 2 nm (1.1 mM). With UV–vis spectroscopy, we detected the formation of AuNPs at a wavelength of 552 nm, and with X-ray diffraction analysis, we proved that the crystal arrangement was face-centered cubic. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43560. |
| Databáze: | OpenAIRE |
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