Unravelling the complex formation mechanism of HfO<sub>2</sub> nanocrystals using <i>in situ</i> pair distribution function analysis
Rasmus S. Christensen, Magnus Kløve, Martin Roelsgaard, Sanna Sommer, Bo B. Iversen
Abstract
nanocrystals have significant disorder as reflected in large Hf atomic displacement parameter (ADP) values, but as the nanocrystals grow to 5-6 nm in size during extended heating, the Hf ADPs decrease toward the values obtained for ordered bulk structures. The nanocrystal growth is not well modelled by the Johnson-Mehl-Avrami expression reflecting that multiple complex chemical processes occur during this highly nonclassical nanocrystal formation under solvothermal conditions.
Topics & Concepts
In situNanocrystalPair distribution functionMaterials scienceFunction (biology)Mechanism (biology)Chemical physicsNanotechnologyChemical engineeringChemistryPhysicsEngineeringBiologyOrganic chemistryGeneticsQuantum mechanicsX-ray Diffraction in CrystallographyMachine Learning in Materials ScienceSemiconductor materials and devices