This involves flowing a fluid over the surface wherein {HEAD ~ the fluid} contains positively charged ions and {TAIL ~ electrons} 
contains
This involves flowing a fluid over the surface wherein { HEAD ~ the fluid } contains positively charged ions and { TAIL ~ electrons }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL