Fluorine has been recognized to selectively stabilize anatase titani-um dioxide (TiO2) crystal facets, however, resolving its physical location at the nanometer scale remains empirically elusive. Here, we provide direct experimental evidence to reveal the spatial distri-bution of fluorine on single truncated anatase bipyramids (TABs) using nanoscale secondary ion mass spectrometry (NanoSIMS). Fluorine was found to preferentially adsorb on the (001) facet over the (101) facet of TABs. Moreover, NanoSIMS depth profiling exhibited a significantly different fluorine distribution between these two facets in the near-surface region, illustrating the essential role of lattice-doped fluorine in the anisotropic crystal growth of TABs.
Revised: March 6, 2020 |
Published: January 18, 2019
Citation
Mulcahy J.R., S. He, D.S. Jin, W. Guo, S. Arteta, J.B. Cliff, and Z. Zhu, et al. 2019.Experimental Insights into the Growth of Single Truncated Anatase Bipyramids.Chemistry - A European Journal 25, no. 4:993-996.PNNL-SA-140103.doi:10.1002/chem.201805773