Site-Isolated Upconversion Nanoparticle Arrays Synthesized in Polyol Nanoreactors

• DOI: 10.1021/acs.jpcc.1c08562
• Publication Date: 2021-11-18T20:45:05Z
• Authors: David D. Xu; Carolin B. Wahl; Jingshan S. Du; Shawn Irgen-Gioro; Emily A. Weiss; Chad A. Mirkin
• Keywords: Nanoreactor; Nanomaterials; Photon Upconversion

A versatile approach for synthesizing Yb3+- and Er3+-doped NaYF4 upconversion nanoparticle (UCNP) arrays is presented. The nanoparticles are positioned at precisely defined locations through the tip-directed deposition of polyol nanoreactors subsequent thermal conversion. This method based on conducting a solution-phase synthesis in nanometer-scale reactors, which provide isolated confined reaction vessels decomposition fluoride precursor coarsening nanoparticles. When annealed 350 °C, degrades, nanoparticles, exhibit properties, crystallize. Single attained each nanoreactor by tuning concentration, size, temperature ramping rate. strategy enhances scope nanostructures that can be synthesized routes and, when combined with massively parallel pen approaches such as polymer lithography, provides generalizable platform high-throughput synthesis, screening, discovery nanomaterials photonics other applications.