The greyscale adjustments were performed using open source image processing software ImageJ, v. 1.52p (National Institutes of Health; Bethesda, MD, USA). 3. Results and Discussion 3.1. Synthesis of Gd(Tb)F3:Tb3+
In the P(PEGMA-AA) molecule, there is a single carbonyl frequency at 1723 cm−1, resembling a combination of the carbonyls of PEGMA ester and dissociated (acrylate) AA, and suggesting an interaction between those via, for example, H-bonding [42]. The carbonyl C=O stretching of P(PEGMA...