Why Nanoparticles Break the Rules
Gold melts at 1064 °C — unless the particle is 2 nm across, when it melts hundreds of degrees lower. Three mechanisms explain nearly everything nanoscale.
Category: Materials
What Is a Unit Cell? Crystallography From Scratch
A unit cell is the smallest repeating box that builds a whole crystal. How to count its atoms, work out its packing, and connect it to density you can measure.
BCC vs FCC vs HCP: Why Crystal Structure Decides Ductility
BCC steel has 48 slip systems and shatters in the cold. FCC copper has 12 and never does. Here is the packing-and-slip physics that decides which.