It is important to differentiate when the crystals have been rounded through natural process (such as long-term metamorphosis) versus through cultural practices. In the case of Figure 2, the ...

Yield stresses are found to increase substantially in crystal grains smaller than a micrometre and continue to deviate on the nanoscale, following a 'smaller is stronger' trend 5. The complete ...

These materials exhibit unique properties and behaviors that differ significantly from their bulk counterparts due to the high volume fraction of grain boundaries and interfaces at the nanoscale.