先进材料疑固实验室 Types of crystal growth Laboratory of Advanced Materials Solidification Continuous growth Liquid R:Growth speed Deposited↓ Rebound个 Interface Solid >Continuous growth occurs on a rough interface,where more than 50%lattice points are void. >Rough surface is normally more than one atomic layer. >Deposited atoms are more stable at the new position due to the bonding from the neighbor atoms. 上游文通大学 SHANGHAI JIAO TONG UNIVERSITY
Types of crystal growth Continuous growth Deposited Rebound Liquid Solid Interface R: Growth speed Continuous growth occurs on a rough interface, where more than 50% lattice points are void. Rough surface is normally more than one atomic layer. Deposited atoms are more stable at the new position due to the bonding from the neighbor atoms
先进材料疑固实验室 Types of crystal growth Laboratory of Advanced Materials Solidification Lateral growth >Sharp interface(smooth surface)only has less than 10%void lattice points.This Arriving atom void lattice points will form Ledges (steps). >The ledges forming from void lattice points are normally less than a few atomic layers. >The deposited atoms on this kind of surface are less bonded. broken bonds'by four.(b)Addition to a ledge (L)only increases the number of broken boods by two,whereas at a jog in a ledge (J)there is no increase. >But the energy barrier for deposition of atoms are different with the deposition position. 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
Types of crystal growth Lateral growth Sharp interface (smooth surface) only has less than 10% void lattice points. This void lattice points will form Ledges (steps). The ledges forming from void lattice points are normally less than a few atomic layers. The deposited atoms on this kind of surface are less bonded. But the energy barrier for deposition of atoms are different with the deposition position
先进材料疑固实验室 Type of crystal growth Laboratory of Advanced Materials Solidification Bonding force (energy barrier for escape)at different position. 0 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
Type of crystal growth Bonding force (energy barrier for escape) at different position