1. Luminescent Ink Based on Upconversion of NaYF4:Er,Yb@MA Nanoparticles: Environmental Friendly Synthesis and Structural and Spectroscopic Assessment
- Author
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Quang Vinh Lam, T.T. Van Tran, Sylvia Turrell, T.T. Giang Le, Maurizio Ferrari, and T.M. Dung Cao
- Subjects
Luminescence ,Photoluminescence ,Materials science ,Optical Phenomena ,Polymers ,Pharmaceutical Science ,Nanoparticle ,hydrophilic ,NaYF4:Er-Yb ,NaYF4:Er,Yb ,Vibration ,Article ,upconversion emission ,Analytical Chemistry ,lcsh:QD241-441 ,Fluorides ,chemistry.chemical_compound ,lcsh:Organic chemistry ,X-Ray Diffraction ,Spectroscopy, Fourier Transform Infrared ,Drug Discovery ,Yttrium ,Ytterbium ,Physical and Theoretical Chemistry ,Maleic Anhydrides ,Spectrum Analysis ,Organic Chemistry ,screen printing ,Maleic anhydride ,Green Chemistry Technology ,Photon upconversion ,Chemical engineering ,chemistry ,Chemistry (miscellaneous) ,Transmission electron microscopy ,Screen printing ,Nanoparticles ,Molecular Medicine ,Ink ,Ethylene glycol ,surface modification ,Erbium - Abstract
NaYF4:Er,Yb upconversion luminescent nanoparticles (UCNPs) were prepared by hydrothermal methods at 180 °C for 24 h. The X-ray diffraction (XRD) and TEM (transmission electron microscopy) images show that the resulting 60 nm UCNPs possess a hexagonal structure. In this work, maleic anhydride (MA) was grafted on the surface of UCNPs to induce hydrophilic properties. The photoluminescence spectra (PL) show upconversion emissions centered around 545 nm and 660 nm under excitation at 980 nm. The luminescent inks, including UCNPs@MA, polyvinyl alcohol (PVA), deionized water (DI), and ethylene glycol (EG), exhibit suitable properties for screen printing, such as high stability, emission intensity, and tunable dynamic viscosity. The printed patterns with a height of 5 mm and a width of 1.5 mm were clearly observed under the irradiation of a 980 nm laser. Our strategy provides a new route for the controlled synthesis of hydrophilic UCNPs, and shows that the UCNPs@MAs have great potential in applications of anti-counterfeiting packing.
- Published
- 2021