Jia-Ahn Pan, Artiom Skripka, Changhwan Lee, Xiao Qi, Anne L Pham, Joshua J Woods, Rebecca J Abergel, P James Schuck, Bruce E Cohen, Emory M Chan
Upconverting nanoparticles (UCNPs) exhibit unique nonlinear optical properties that can be harnessed in microscopy, sensing, and photonics. However, forming high-resolution nano- and micropatterns of UCNPs with large packing fractions is still challenging. Additionally, there is limited understanding of how nanoparticle patterning chemistries are affected by the particle size. Here, we explore direct patterning chemistries for 6-18 nm Tm3+ -, Yb3+ /Tm3+ -, and Yb3+ /Er3+ -based UCNPs using ligands that form either new ionic linkages or covalent bonds between UCNPs under ultraviolet (UV), electron-beam (e-beam), and near-infrared (NIR) exposure...
March 11, 2024: Journal of the American Chemical Society