Solid‐to‐Hollow Single‐Particle Manipulation of a Self‐Assembled Luminescent NaYF4:Yb,Er Nanocrystal Monolayer by Electron‐Beam Lithography

A hollow victory: Hollow-sphere nanocrystals are fabricated by electron-beam lithography in a self-assembled luminescent NaYF4:Yb,Er nanocrystal monolayer (see picture). The formation mechanism is a heat-induced inner acid-etching process. Pattern formation can be achieved with single-nanoparticle resolution. The 20-nm β-NaYF4:Yb,Er nanocrystal monolayer acts as a data-storage medium. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.