Synthesis of Tin Dioxide Octahedral Nanoparticles with Exposed High‐Energy {221} Facets and Enhanced Gas‐Sensing Properties

Selective exposure of high-energy {221} facets with many surface dangling bonds, (111) terraces, and (110) steps (bottom picture) at the surface of octahedral SnO2 nanoparticles (top) through a simple hydrothermal synthesis route gives them enhanced gas-sensing performance over particles with other shapes, whereby the sensing activity is proportional to the fraction of {221} facets among the exposed surfaces. 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.