Stability of Grafted Polymer Nanoscale Films toward Gamma Irradiation.

The present article focuses on the influence of gamma irradiation on nanoscale polymer grafted films and explores avenues for improvements in their stability toward the ionizing radiation. In terms of applications, we concentrate on enrichment polymer layers (EPLs), which are polymer thin films employed in sensor devices for the detection of chemical and biological substances. Specifically, we have studied the influence of gamma irradiation on nanoscale poly(glycidyl methacrylate) (PGMA) grafted EPL films.

Color kinetic nanoparticles.

Eu3+ doped LaF3 nanoparticles functionalized with a 3-4 formylphenyl benzoic acid ligand were synthesized. Excitation energy-dependent energy transfer from the ligand to Eu3+ yields color tunability from the red to greenish-blue as a function of excitation wavelengths. This synthetic approach provides large shifts in the resultant chromaticity with an excitation wavelength including the generation of white light.